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Merge branch 'akpm' (Andrew's incoming - part two)

Browse source 
Says Andrew:

 "60 patches.  That's good enough for -rc1 I guess.  I have quite a lot
  of detritus to be rechecked, work through maintainers, etc.

 - most of the remains of MM
 - rtc
 - various misc
 - cgroups
 - memcg
 - cpusets
 - procfs
 - ipc
 - rapidio
 - sysctl
 - pps
 - w1
 - drivers/misc
 - aio"

* akpm: (60 commits)
  memcg: replace ss->id_lock with a rwlock
  aio: allocate kiocbs in batches
  drivers/misc/vmw_balloon.c: fix typo in code comment
  drivers/misc/vmw_balloon.c: determine page allocation flag can_sleep outside loop
  w1: disable irqs in critical section
  drivers/w1/w1_int.c: multiple masters used same init_name
  drivers/power/ds2780_battery.c: fix deadlock upon insertion and removal
  drivers/power/ds2780_battery.c: add a nolock function to w1 interface
  drivers/power/ds2780_battery.c: create central point for calling w1 interface
  w1: ds2760 and ds2780, use ida for id and ida_simple_get() to get it
  pps gpio client: add missing dependency
  pps: new client driver using GPIO
  pps: default echo function
  include/linux/dma-mapping.h: add dma_zalloc_coherent()
  sysctl: make CONFIG_SYSCTL_SYSCALL default to n
  sysctl: add support for poll()
  RapidIO: documentation update
  drivers/net/rionet.c: fix ethernet address macros for LE platforms
  RapidIO: fix potential null deref in rio_setup_device()
  RapidIO: add mport driver for Tsi721 bridge
  ...
This commit is contained in:
Linus Torvalds 2011-11-02 16:07:27 -07:00
commit 092f4c56c1
70 changed files with 4915 additions and 1041 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
Documentation/DMA-API.txt
View file

@ -50,6 +50,13 @@ specify the GFP_ flags (see kmalloc) for the allocation (the
implementation may choose to ignore flags that affect the location of
the returned memory, like GFP_DMA).
void *
dma_zalloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
Wraps dma_alloc_coherent() and also zeroes the returned memory if the
allocation attempt succeeded.
void
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle)

1
Documentation/cgroups/memory.txt
View file

@ -418,7 +418,6 @@ total_unevictable - sum of all children's "unevictable"
# The following additional stats are dependent on CONFIG_DEBUG_VM.
inactive_ratio - VM internal parameter. (see mm/page_alloc.c)
recent_rotated_anon - VM internal parameter. (see mm/vmscan.c)
recent_rotated_file - VM internal parameter. (see mm/vmscan.c)
recent_scanned_anon - VM internal parameter. (see mm/vmscan.c)

35
Documentation/feature-removal-schedule.txt
View file

@ -133,41 +133,6 @@ Who: Pavel Machek <pavel@ucw.cz>
---------------------------
What: sys_sysctl
When: September 2010
Option: CONFIG_SYSCTL_SYSCALL
Why: The same information is available in a more convenient from
/proc/sys, and none of the sysctl variables appear to be
important performance wise.
Binary sysctls are a long standing source of subtle kernel
bugs and security issues.
When I looked several months ago all I could find after
searching several distributions were 5 user space programs and
glibc (which falls back to /proc/sys) using this syscall.
The man page for sysctl(2) documents it as unusable for user
space programs.
sysctl(2) is not generally ABI compatible to a 32bit user
space application on a 64bit and a 32bit kernel.
For the last several months the policy has been no new binary
sysctls and no one has put forward an argument to use them.
Binary sysctls issues seem to keep happening appearing so
properly deprecating them (with a warning to user space) and a
2 year grace warning period will mean eventually we can kill
them and end the pain.
In the mean time individual binary sysctls can be dealt with
in a piecewise fashion.
Who: Eric Biederman <ebiederm@xmission.com>
---------------------------
What: /proc/<pid>/oom_adj
When: August 2012
Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's

2
Documentation/rapidio/rapidio.txt
View file

@ -144,7 +144,7 @@ and the default device ID in order to access the device on the active port.
After the host has completed enumeration of the entire network it releases
devices by clearing device ID locks (calls rio_clear_locks()). For each endpoint
in the system, it sets the Master Enable bit in the Port General Control CSR
in the system, it sets the Discovered bit in the Port General Control CSR
to indicate that enumeration is completed and agents are allowed to execute
passive discovery of the network.

49
Documentation/rapidio/tsi721.txt Normal file
View file

@ -0,0 +1,49 @@
RapidIO subsystem mport driver for IDT Tsi721 PCI Express-to-SRIO bridge.
=========================================================================
I. Overview
This driver implements all currently defined RapidIO mport callback functions.
It supports maintenance read and write operations, inbound and outbound RapidIO
doorbells, inbound maintenance port-writes and RapidIO messaging.
To generate SRIO maintenance transactions this driver uses one of Tsi721 DMA
channels. This mechanism provides access to larger range of hop counts and
destination IDs without need for changes in outbound window translation.
RapidIO messaging support uses dedicated messaging channels for each mailbox.
For inbound messages this driver uses destination ID matching to forward messages
into the corresponding message queue. Messaging callbacks are implemented to be
fully compatible with RIONET driver (Ethernet over RapidIO messaging services).
II. Known problems
None.
III. To do
Add DMA data transfers (non-messaging).
Add inbound region (SRIO-to-PCIe) mapping.
IV. Version History
1.0.0 - Initial driver release.
V. License
-----------------------------------------------
Copyright(c) 2011 Integrated Device Technology, Inc. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

12
arch/powerpc/mm/gup.c
View file

@ -16,16 +16,6 @@
#ifdef __HAVE_ARCH_PTE_SPECIAL
static inline void get_huge_page_tail(struct page *page)
{
/*
* __split_huge_page_refcount() cannot run
* from under us.
*/
VM_BUG_ON(atomic_read(&page->_count) < 0);
atomic_inc(&page->_count);
}
/*
* The performance critical leaf functions are made noinline otherwise gcc
* inlines everything into a single function which results in too much
@ -57,8 +47,6 @@ static noinline int gup_pte_range(pmd_t pmd, unsigned long addr,
put_page(page);
return 0;
}
if (PageTail(page))
get_huge_page_tail(page);
pages[*nr] = page;
(*nr)++;

21
arch/powerpc/mm/hugetlbpage.c
View file

@ -390,7 +390,7 @@ static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long add
{
unsigned long mask;
unsigned long pte_end;
struct page *head, *page;
struct page *head, *page, *tail;
pte_t pte;
int refs;
@ -413,6 +413,7 @@ static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long add
head = pte_page(pte);
page = head + ((addr & (sz-1)) >> PAGE_SHIFT);
tail = page;
do {
VM_BUG_ON(compound_head(page) != head);
pages[*nr] = page;
@ -428,10 +429,20 @@ static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long add
if (unlikely(pte_val(pte) != pte_val(*ptep))) {
/* Could be optimized better */
while (*nr) {
put_page(page);
(*nr)--;
}
*nr -= refs;
while (refs--)
put_page(head);
return 0;
}
/*
* Any tail page need their mapcount reference taken before we
* return.
*/
while (refs--) {
if (PageTail(tail))
get_huge_page_tail(tail);
tail++;
}
return 1;

1
arch/powerpc/sysdev/fsl_rio.c
View file

@ -1608,6 +1608,7 @@ int fsl_rio_setup(struct platform_device *dev)
return 0;
err:
iounmap(priv->regs_win);
release_resource(&port->iores);
err_res:
kfree(priv);
err_priv:

14
arch/s390/mm/gup.c
View file

@ -52,7 +52,7 @@ static inline int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
unsigned long end, int write, struct page **pages, int *nr)
{
unsigned long mask, result;
struct page *head, *page;
struct page *head, *page, *tail;
int refs;
result = write ? 0 : _SEGMENT_ENTRY_RO;
@ -64,6 +64,7 @@ static inline int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
refs = 0;
head = pmd_page(pmd);
page = head + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
tail = page;
do {
VM_BUG_ON(compound_head(page) != head);
pages[*nr] = page;
@ -81,6 +82,17 @@ static inline int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
*nr -= refs;
while (refs--)
put_page(head);
return 0;
}
/*
* Any tail page need their mapcount reference taken before we
* return.
*/
while (refs--) {
if (PageTail(tail))
get_huge_page_tail(tail);
tail++;
}
return 1;

2
arch/sparc/mm/gup.c
View file

@ -56,6 +56,8 @@ static noinline int gup_pte_range(pmd_t pmd, unsigned long addr,
put_page(head);
return 0;
}
if (head != page)
get_huge_page_tail(page);
pages[*nr] = page;
(*nr)++;

10
arch/x86/mm/gup.c
View file

@ -108,16 +108,6 @@ static inline void get_head_page_multiple(struct page *page, int nr)
SetPageReferenced(page);
}
static inline void get_huge_page_tail(struct page *page)
{
/*
* __split_huge_page_refcount() cannot run
* from under us.
*/
VM_BUG_ON(atomic_read(&page->_count) < 0);
atomic_inc(&page->_count);
}
static noinline int gup_huge_pmd(pmd_t pmd, unsigned long addr,
unsigned long end, int write, struct page **pages, int *nr)
{

4
drivers/misc/vmw_balloon.c
View file

@ -151,7 +151,7 @@ MODULE_LICENSE("GPL");
struct vmballoon_stats {
unsigned int timer;
/* allocation statustics */
/* allocation statistics */
unsigned int alloc;
unsigned int alloc_fail;
unsigned int sleep_alloc;
@ -412,6 +412,7 @@ static int vmballoon_reserve_page(struct vmballoon *b, bool can_sleep)
gfp_t flags;
unsigned int hv_status;
bool locked = false;
flags = can_sleep ? VMW_PAGE_ALLOC_CANSLEEP : VMW_PAGE_ALLOC_NOSLEEP;
do {
if (!can_sleep)
@ -419,7 +420,6 @@ static int vmballoon_reserve_page(struct vmballoon *b, bool can_sleep)
else
STATS_INC(b->stats.sleep_alloc);
flags = can_sleep ? VMW_PAGE_ALLOC_CANSLEEP : VMW_PAGE_ALLOC_NOSLEEP;
page = alloc_page(flags);
if (!page) {
if (!can_sleep)

4
drivers/net/rionet.c
View file

@ -88,8 +88,8 @@ static struct rio_dev **rionet_active;
#define dev_rionet_capable(dev) \
is_rionet_capable(dev->src_ops, dev->dst_ops)
#define RIONET_MAC_MATCH(x) (*(u32 *)x == 0x00010001)
#define RIONET_GET_DESTID(x) (*(u16 *)(x + 4))
#define RIONET_MAC_MATCH(x) (!memcmp((x), "\00\01\00\01", 4))
#define RIONET_GET_DESTID(x) ((*((u8 *)x + 4) << 8) | *((u8 *)x + 5))
static int rionet_rx_clean(struct net_device *ndev)
{

86
drivers/power/ds2780_battery.c
View file

@ -39,6 +39,7 @@ struct ds2780_device_info {
struct device *dev;
struct power_supply bat;
struct device *w1_dev;
struct task_struct *mutex_holder;
};
enum current_types {
@ -49,8 +50,8 @@ enum current_types {
static const char model[] = "DS2780";
static const char manufacturer[] = "Maxim/Dallas";
static inline struct ds2780_device_info *to_ds2780_device_info(
struct power_supply *psy)
static inline struct ds2780_device_info *
to_ds2780_device_info(struct power_supply *psy)
{
return container_of(psy, struct ds2780_device_info, bat);
}
@ -60,17 +61,28 @@ static inline struct power_supply *to_power_supply(struct device *dev)
return dev_get_drvdata(dev);
}
static inline int ds2780_read8(struct device *dev, u8 *val, int addr)
static inline int ds2780_battery_io(struct ds2780_device_info *dev_info,
char *buf, int addr, size_t count, int io)
{
return w1_ds2780_io(dev, val, addr, sizeof(u8), 0);
if (dev_info->mutex_holder == current)
return w1_ds2780_io_nolock(dev_info->w1_dev, buf, addr, count, io);
else
return w1_ds2780_io(dev_info->w1_dev, buf, addr, count, io);
}
static int ds2780_read16(struct device *dev, s16 *val, int addr)
static inline int ds2780_read8(struct ds2780_device_info *dev_info, u8 *val,
int addr)
{
return ds2780_battery_io(dev_info, val, addr, sizeof(u8), 0);
}
static int ds2780_read16(struct ds2780_device_info *dev_info, s16 *val,
int addr)
{
int ret;
u8 raw[2];
ret = w1_ds2780_io(dev, raw, addr, sizeof(u8) * 2, 0);
ret = ds2780_battery_io(dev_info, raw, addr, sizeof(raw), 0);
if (ret < 0)
return ret;
@ -79,16 +91,16 @@ static int ds2780_read16(struct device *dev, s16 *val, int addr)
return 0;
}
static inline int ds2780_read_block(struct device *dev, u8 *val, int addr,
size_t count)
static inline int ds2780_read_block(struct ds2780_device_info *dev_info,
u8 *val, int addr, size_t count)
{
return w1_ds2780_io(dev, val, addr, count, 0);
return ds2780_battery_io(dev_info, val, addr, count, 0);
}
static inline int ds2780_write(struct device *dev, u8 *val, int addr,
size_t count)
static inline int ds2780_write(struct ds2780_device_info *dev_info, u8 *val,
int addr, size_t count)
{
return w1_ds2780_io(dev, val, addr, count, 1);
return ds2780_battery_io(dev_info, val, addr, count, 1);
}
static inline int ds2780_store_eeprom(struct device *dev, int addr)
@ -122,7 +134,7 @@ static int ds2780_set_sense_register(struct ds2780_device_info *dev_info,
{
int ret;
ret = ds2780_write(dev_info->w1_dev, &conductance,
ret = ds2780_write(dev_info, &conductance,
DS2780_RSNSP_REG, sizeof(u8));
if (ret < 0)
return ret;
@ -134,7 +146,7 @@ static int ds2780_set_sense_register(struct ds2780_device_info *dev_info,
static int ds2780_get_rsgain_register(struct ds2780_device_info *dev_info,
u16 *rsgain)
{
return ds2780_read16(dev_info->w1_dev, rsgain, DS2780_RSGAIN_MSB_REG);
return ds2780_read16(dev_info, rsgain, DS2780_RSGAIN_MSB_REG);
}
/* Set RSGAIN value from 0 to 1.999 in steps of 0.001 */
@ -144,8 +156,8 @@ static int ds2780_set_rsgain_register(struct ds2780_device_info *dev_info,
int ret;
u8 raw[] = {rsgain >> 8, rsgain & 0xFF};
ret = ds2780_write(dev_info->w1_dev, raw,
DS2780_RSGAIN_MSB_REG, sizeof(u8) * 2);
ret = ds2780_write(dev_info, raw,
DS2780_RSGAIN_MSB_REG, sizeof(raw));
if (ret < 0)
return ret;
@ -167,7 +179,7 @@ static int ds2780_get_voltage(struct ds2780_device_info *dev_info,
* Bits 2 - 0 of the voltage value are in bits 7 - 5 of the
* voltage LSB register
*/
ret = ds2780_read16(dev_info->w1_dev, &voltage_raw,
ret = ds2780_read16(dev_info, &voltage_raw,
DS2780_VOLT_MSB_REG);
if (ret < 0)
return ret;
@ -196,7 +208,7 @@ static int ds2780_get_temperature(struct ds2780_device_info *dev_info,
* Bits 2 - 0 of the temperature value are in bits 7 - 5 of the
* temperature LSB register
*/
ret = ds2780_read16(dev_info->w1_dev, &temperature_raw,
ret = ds2780_read16(dev_info, &temperature_raw,
DS2780_TEMP_MSB_REG);
if (ret < 0)
return ret;
@ -222,13 +234,13 @@ static int ds2780_get_current(struct ds2780_device_info *dev_info,
* The units of measurement for current are dependent on the value of
* the sense resistor.
*/
ret = ds2780_read8(dev_info->w1_dev, &sense_res_raw, DS2780_RSNSP_REG);
ret = ds2780_read8(dev_info, &sense_res_raw, DS2780_RSNSP_REG);
if (ret < 0)
return ret;
if (sense_res_raw == 0) {
dev_err(dev_info->dev, "sense resistor value is 0\n");
return -ENXIO;
return -EINVAL;
}
sense_res = 1000 / sense_res_raw;
@ -248,7 +260,7 @@ static int ds2780_get_current(struct ds2780_device_info *dev_info,
* Bits 7 - 0 of the current value are in bits 7 - 0 of the current
* LSB register
*/
ret = ds2780_read16(dev_info->w1_dev, &current_raw, reg_msb);
ret = ds2780_read16(dev_info, &current_raw, reg_msb);
if (ret < 0)
return ret;
@ -267,7 +279,7 @@ static int ds2780_get_accumulated_current(struct ds2780_device_info *dev_info,
* The units of measurement for accumulated current are dependent on
* the value of the sense resistor.
*/
ret = ds2780_read8(dev_info->w1_dev, &sense_res_raw, DS2780_RSNSP_REG);
ret = ds2780_read8(dev_info, &sense_res_raw, DS2780_RSNSP_REG);
if (ret < 0)
return ret;
@ -285,7 +297,7 @@ static int ds2780_get_accumulated_current(struct ds2780_device_info *dev_info,
* Bits 7 - 0 of the ACR value are in bits 7 - 0 of the ACR
* LSB register
*/
ret = ds2780_read16(dev_info->w1_dev, &current_raw, DS2780_ACR_MSB_REG);
ret = ds2780_read16(dev_info, &current_raw, DS2780_ACR_MSB_REG);
if (ret < 0)
return ret;
@ -299,7 +311,7 @@ static int ds2780_get_capacity(struct ds2780_device_info *dev_info,
int ret;
u8 raw;
ret = ds2780_read8(dev_info->w1_dev, &raw, DS2780_RARC_REG);
ret = ds2780_read8(dev_info, &raw, DS2780_RARC_REG);
if (ret < 0)
return ret;
@ -345,7 +357,7 @@ static int ds2780_get_charge_now(struct ds2780_device_info *dev_info,
* Bits 7 - 0 of the RAAC value are in bits 7 - 0 of the RAAC
* LSB register
*/
ret = ds2780_read16(dev_info->w1_dev, &charge_raw, DS2780_RAAC_MSB_REG);
ret = ds2780_read16(dev_info, &charge_raw, DS2780_RAAC_MSB_REG);
if (ret < 0)
return ret;
@ -356,7 +368,7 @@ static int ds2780_get_charge_now(struct ds2780_device_info *dev_info,
static int ds2780_get_control_register(struct ds2780_device_info *dev_info,
u8 *control_reg)
{
return ds2780_read8(dev_info->w1_dev, control_reg, DS2780_CONTROL_REG);
return ds2780_read8(dev_info, control_reg, DS2780_CONTROL_REG);
}
static int ds2780_set_control_register(struct ds2780_device_info *dev_info,
@ -364,7 +376,7 @@ static int ds2780_set_control_register(struct ds2780_device_info *dev_info,
{
int ret;
ret = ds2780_write(dev_info->w1_dev, &control_reg,
ret = ds2780_write(dev_info, &control_reg,
DS2780_CONTROL_REG, sizeof(u8));
if (ret < 0)
return ret;
@ -503,7 +515,7 @@ static ssize_t ds2780_get_sense_resistor_value(struct device *dev,
struct power_supply *psy = to_power_supply(dev);
struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
ret = ds2780_read8(dev_info->w1_dev, &sense_resistor, DS2780_RSNSP_REG);
ret = ds2780_read8(dev_info, &sense_resistor, DS2780_RSNSP_REG);
if (ret < 0)
return ret;
@ -584,7 +596,7 @@ static ssize_t ds2780_get_pio_pin(struct device *dev,
struct power_supply *psy = to_power_supply(dev);
struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
ret = ds2780_read8(dev_info->w1_dev, &sfr, DS2780_SFR_REG);
ret = ds2780_read8(dev_info, &sfr, DS2780_SFR_REG);
if (ret < 0)
return ret;
@ -611,7 +623,7 @@ static ssize_t ds2780_set_pio_pin(struct device *dev,
return -EINVAL;
}
ret = ds2780_write(dev_info->w1_dev, &new_setting,
ret = ds2780_write(dev_info, &new_setting,
DS2780_SFR_REG, sizeof(u8));
if (ret < 0)
return ret;
@ -632,7 +644,7 @@ static ssize_t ds2780_read_param_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK1_END -
DS2780_EEPROM_BLOCK1_START + 1 - off);
return ds2780_read_block(dev_info->w1_dev, buf,
return ds2780_read_block(dev_info, buf,
DS2780_EEPROM_BLOCK1_START + off, count);
}
@ -650,7 +662,7 @@ static ssize_t ds2780_write_param_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK1_END -
DS2780_EEPROM_BLOCK1_START + 1 - off);
ret = ds2780_write(dev_info->w1_dev, buf,
ret = ds2780_write(dev_info, buf,
DS2780_EEPROM_BLOCK1_START + off, count);
if (ret < 0)
return ret;
@ -685,9 +697,8 @@ static ssize_t ds2780_read_user_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK0_END -
DS2780_EEPROM_BLOCK0_START + 1 - off);
return ds2780_read_block(dev_info->w1_dev, buf,
return ds2780_read_block(dev_info, buf,
DS2780_EEPROM_BLOCK0_START + off, count);
}
static ssize_t ds2780_write_user_eeprom_bin(struct file *filp,
@ -704,7 +715,7 @@ static ssize_t ds2780_write_user_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK0_END -
DS2780_EEPROM_BLOCK0_START + 1 - off);
ret = ds2780_write(dev_info->w1_dev, buf,
ret = ds2780_write(dev_info, buf,
DS2780_EEPROM_BLOCK0_START + off, count);
if (ret < 0)
return ret;
@ -768,6 +779,7 @@ static int __devinit ds2780_battery_probe(struct platform_device *pdev)
dev_info->bat.properties = ds2780_battery_props;
dev_info->bat.num_properties = ARRAY_SIZE(ds2780_battery_props);
dev_info->bat.get_property = ds2780_battery_get_property;
dev_info->mutex_holder = current;
ret = power_supply_register(&pdev->dev, &dev_info->bat);
if (ret) {
@ -797,6 +809,8 @@ static int __devinit ds2780_battery_probe(struct platform_device *pdev)
goto fail_remove_bin_file;
}
dev_info->mutex_holder = NULL;
return 0;
fail_remove_bin_file:
@ -816,6 +830,8 @@ static int __devexit ds2780_battery_remove(struct platform_device *pdev)
{
struct ds2780_device_info *dev_info = platform_get_drvdata(pdev);
dev_info->mutex_holder = current;
/* remove attributes */
sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2780_attr_group);

9
drivers/pps/clients/Kconfig
View file

@ -29,4 +29,13 @@ config PPS_CLIENT_PARPORT
If you say yes here you get support for a PPS source connected
with the interrupt pin of your parallel port.
config PPS_CLIENT_GPIO
tristate "PPS client using GPIO"
depends on PPS && GENERIC_HARDIRQS
help
If you say yes here you get support for a PPS source using
GPIO. To be useful you must also register a platform device
specifying the GPIO pin and other options, usually in your board
setup.
endif

1
drivers/pps/clients/Makefile
View file

@ -5,5 +5,6 @@
obj-$(CONFIG_PPS_CLIENT_KTIMER) += pps-ktimer.o
obj-$(CONFIG_PPS_CLIENT_LDISC) += pps-ldisc.o
obj-$(CONFIG_PPS_CLIENT_PARPORT) += pps_parport.o
obj-$(CONFIG_PPS_CLIENT_GPIO) += pps-gpio.o
ccflags-$(CONFIG_PPS_DEBUG) := -DDEBUG

227
drivers/pps/clients/pps-gpio.c Normal file
View file

@ -0,0 +1,227 @@
/*
* pps-gpio.c -- PPS client driver using GPIO
*
*
* Copyright (C) 2010 Ricardo Martins <rasm@fe.up.pt>
* Copyright (C) 2011 James Nuss <jamesnuss@nanometrics.ca>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define PPS_GPIO_NAME "pps-gpio"
#define pr_fmt(fmt) PPS_GPIO_NAME ": " fmt
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/pps_kernel.h>
#include <linux/pps-gpio.h>
#include <linux/gpio.h>
#include <linux/list.h>
/* Info for each registered platform device */
struct pps_gpio_device_data {
int irq; /* IRQ used as PPS source */
struct pps_device *pps; /* PPS source device */
struct pps_source_info info; /* PPS source information */
const struct pps_gpio_platform_data *pdata;
};
/*
* Report the PPS event
*/
static irqreturn_t pps_gpio_irq_handler(int irq, void *data)
{
const struct pps_gpio_device_data *info;
struct pps_event_time ts;
int rising_edge;
/* Get the time stamp first */
pps_get_ts(&ts);
info = data;
rising_edge = gpio_get_value(info->pdata->gpio_pin);
if ((rising_edge && !info->pdata->assert_falling_edge) ||
(!rising_edge && info->pdata->assert_falling_edge))
pps_event(info->pps, &ts, PPS_CAPTUREASSERT, NULL);
else if (info->pdata->capture_clear &&
((rising_edge && info->pdata->assert_falling_edge) ||
(!rising_edge && !info->pdata->assert_falling_edge)))
pps_event(info->pps, &ts, PPS_CAPTURECLEAR, NULL);
return IRQ_HANDLED;
}
static int pps_gpio_setup(struct platform_device *pdev)
{
int ret;
const struct pps_gpio_platform_data *pdata = pdev->dev.platform_data;
ret = gpio_request(pdata->gpio_pin, pdata->gpio_label);
if (ret) {
pr_warning("failed to request GPIO %u\n", pdata->gpio_pin);
return -EINVAL;
}
ret = gpio_direction_input(pdata->gpio_pin);
if (ret) {
pr_warning("failed to set pin direction\n");
gpio_free(pdata->gpio_pin);
return -EINVAL;
}
return 0;
}
static unsigned long
get_irqf_trigger_flags(const struct pps_gpio_platform_data *pdata)
{
unsigned long flags = pdata->assert_falling_edge ?
IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING;
if (pdata->capture_clear) {
flags |= ((flags & IRQF_TRIGGER_RISING) ?
IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING);
}
return flags;
}
static int pps_gpio_probe(struct platform_device *pdev)
{
struct pps_gpio_device_data *data;
int irq;
int ret;
int err;
int pps_default_params;
const struct pps_gpio_platform_data *pdata = pdev->dev.platform_data;
/* GPIO setup */
ret = pps_gpio_setup(pdev);
if (ret)
return -EINVAL;
/* IRQ setup */
irq = gpio_to_irq(pdata->gpio_pin);
if (irq < 0) {
pr_err("failed to map GPIO to IRQ: %d\n", irq);
err = -EINVAL;
goto return_error;
}
/* allocate space for device info */
data = kzalloc(sizeof(struct pps_gpio_device_data), GFP_KERNEL);
if (data == NULL) {
err = -ENOMEM;
goto return_error;
}
/* initialize PPS specific parts of the bookkeeping data structure. */
data->info.mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT |
PPS_ECHOASSERT | PPS_CANWAIT | PPS_TSFMT_TSPEC;
if (pdata->capture_clear)
data->info.mode |= PPS_CAPTURECLEAR | PPS_OFFSETCLEAR |
PPS_ECHOCLEAR;
data->info.owner = THIS_MODULE;
snprintf(data->info.name, PPS_MAX_NAME_LEN - 1, "%s.%d",
pdev->name, pdev->id);
/* register PPS source */
pps_default_params = PPS_CAPTUREASSERT | PPS_OFFSETASSERT;
if (pdata->capture_clear)
pps_default_params |= PPS_CAPTURECLEAR | PPS_OFFSETCLEAR;
data->pps = pps_register_source(&data->info, pps_default_params);
if (data->pps == NULL) {
kfree(data);
pr_err("failed to register IRQ %d as PPS source\n", irq);
err = -EINVAL;
goto return_error;
}
data->irq = irq;
data->pdata = pdata;
/* register IRQ interrupt handler */
ret = request_irq(irq, pps_gpio_irq_handler,
get_irqf_trigger_flags(pdata), data->info.name, data);
if (ret) {
pps_unregister_source(data->pps);
kfree(data);
pr_err("failed to acquire IRQ %d\n", irq);
err = -EINVAL;
goto return_error;
}
platform_set_drvdata(pdev, data);
dev_info(data->pps->dev, "Registered IRQ %d as PPS source\n", irq);
return 0;
return_error:
gpio_free(pdata->gpio_pin);
return err;
}
static int pps_gpio_remove(struct platform_device *pdev)
{
struct pps_gpio_device_data *data = platform_get_drvdata(pdev);
const struct pps_gpio_platform_data *pdata = data->pdata;
platform_set_drvdata(pdev, NULL);
free_irq(data->irq, data);
gpio_free(pdata->gpio_pin);
pps_unregister_source(data->pps);
pr_info("removed IRQ %d as PPS source\n", data->irq);
kfree(data);
return 0;
}
static struct platform_driver pps_gpio_driver = {
.probe = pps_gpio_probe,
.remove = __devexit_p(pps_gpio_remove),
.driver = {
.name = PPS_GPIO_NAME,
.owner = THIS_MODULE
},
};
static int __init pps_gpio_init(void)
{
int ret = platform_driver_register(&pps_gpio_driver);
if (ret < 0)
pr_err("failed to register platform driver\n");
return ret;
}
static void __exit pps_gpio_exit(void)
{
platform_driver_unregister(&pps_gpio_driver);
pr_debug("unregistered platform driver\n");
}
module_init(pps_gpio_init);
module_exit(pps_gpio_exit);
MODULE_AUTHOR("Ricardo Martins <rasm@fe.up.pt>");
MODULE_AUTHOR("James Nuss <jamesnuss@nanometrics.ca>");
MODULE_DESCRIPTION("Use GPIO pin as PPS source");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.0.0");

12
drivers/pps/clients/pps-ktimer.c
View file

@ -51,17 +51,6 @@ static void pps_ktimer_event(unsigned long ptr)
mod_timer(&ktimer, jiffies + HZ);
}
/*
* The echo function
*/
static void pps_ktimer_echo(struct pps_device *pps, int event, void *data)
{
dev_info(pps->dev, "echo %s %s\n",
event & PPS_CAPTUREASSERT ? "assert" : "",
event & PPS_CAPTURECLEAR ? "clear" : "");
}
/*
* The PPS info struct
*/
@ -72,7 +61,6 @@ static struct pps_source_info pps_ktimer_info = {
.mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT |
PPS_ECHOASSERT |
PPS_CANWAIT | PPS_TSFMT_TSPEC,
.echo = pps_ktimer_echo,
.owner = THIS_MODULE,
};

9
drivers/pps/clients/pps_parport.c
View file

@ -133,14 +133,6 @@ static void parport_irq(void *handle)
return;
}
/* the PPS echo function */
static void pps_echo(struct pps_device *pps, int event, void *data)
{
dev_info(pps->dev, "echo %s %s\n",
event & PPS_CAPTUREASSERT ? "assert" : "",
event & PPS_CAPTURECLEAR ? "clear" : "");
}
static void parport_attach(struct parport *port)
{
struct pps_client_pp *device;
@ -151,7 +143,6 @@ static void parport_attach(struct parport *port)
PPS_OFFSETASSERT | PPS_OFFSETCLEAR | \
PPS_ECHOASSERT | PPS_ECHOCLEAR | \
PPS_CANWAIT | PPS_TSFMT_TSPEC,
.echo = pps_echo,
.owner = THIS_MODULE,
.dev = NULL
};

20
drivers/pps/kapi.c
View file

@ -52,6 +52,14 @@ static void pps_add_offset(struct pps_ktime *ts, struct pps_ktime *offset)
ts->sec += offset->sec;
}
static void pps_echo_client_default(struct pps_device *pps, int event,
void *data)
{
dev_info(pps->dev, "echo %s %s\n",
event & PPS_CAPTUREASSERT ? "assert" : "",
event & PPS_CAPTURECLEAR ? "clear" : "");
}
/*
* Exported functions
*/
@ -80,13 +88,6 @@ struct pps_device *pps_register_source(struct pps_source_info *info,
err = -EINVAL;
goto pps_register_source_exit;
}
if ((info->mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)) != 0 &&
info->echo == NULL) {
pr_err("%s: echo function is not defined\n",
info->name);
err = -EINVAL;
goto pps_register_source_exit;
}
if ((info->mode & (PPS_TSFMT_TSPEC | PPS_TSFMT_NTPFP)) == 0) {
pr_err("%s: unspecified time format\n",
info->name);
@ -108,6 +109,11 @@ struct pps_device *pps_register_source(struct pps_source_info *info,
pps->params.mode = default_params;
pps->info = *info;
/* check for default echo function */
if ((pps->info.mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)) &&
pps->info.echo == NULL)
pps->info.echo = pps_echo_client_default;
init_waitqueue_head(&pps->queue);
spin_lock_init(&pps->lock);

6
drivers/rapidio/Kconfig
View file

@ -1,6 +1,8 @@
#
# RapidIO configuration
#
source "drivers/rapidio/devices/Kconfig"
config RAPIDIO_DISC_TIMEOUT
int "Discovery timeout duration (seconds)"
depends on RAPIDIO
@ -20,8 +22,6 @@ config RAPIDIO_ENABLE_RX_TX_PORTS
ports for Input/Output direction to allow other traffic
than Maintenance transfers.
source "drivers/rapidio/switches/Kconfig"
config RAPIDIO_DEBUG
bool "RapidIO subsystem debug messages"
depends on RAPIDIO
@ -32,3 +32,5 @@ config RAPIDIO_DEBUG
going on.
If you are unsure about this, say N here.
source "drivers/rapidio/switches/Kconfig"

1
drivers/rapidio/Makefile
View file

@ -4,5 +4,6 @@
obj-y += rio.o rio-access.o rio-driver.o rio-scan.o rio-sysfs.o
obj-$(CONFIG_RAPIDIO) += switches/
obj-$(CONFIG_RAPIDIO) += devices/
subdir-ccflags-$(CONFIG_RAPIDIO_DEBUG) := -DDEBUG

10
drivers/rapidio/devices/Kconfig Normal file
View file

@ -0,0 +1,10 @@
#
# RapidIO master port configuration
#
config RAPIDIO_TSI721
bool "IDT Tsi721 PCI Express SRIO Controller support"
depends on RAPIDIO && PCIEPORTBUS
default "n"
---help---
Include support for IDT Tsi721 PCI Express Serial RapidIO controller.

5
drivers/rapidio/devices/Makefile Normal file
View file

@ -0,0 +1,5 @@
#
# Makefile for RapidIO devices
#
obj-$(CONFIG_RAPIDIO_TSI721) += tsi721.o

2360
drivers/rapidio/devices/tsi721.c Normal file
View file

File diff suppressed because it is too large Load diff

766
drivers/rapidio/devices/tsi721.h Normal file
View file

@ -0,0 +1,766 @@
/*
* Tsi721 PCIExpress-to-SRIO bridge definitions
*
* Copyright 2011, Integrated Device Technology, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __TSI721_H
#define __TSI721_H
#define DRV_NAME "tsi721"
#define DEFAULT_HOPCOUNT 0xff
#define DEFAULT_DESTID 0xff
/* PCI device ID */
#define PCI_DEVICE_ID_TSI721 0x80ab
#define BAR_0 0
#define BAR_1 1
#define BAR_2 2
#define BAR_4 4
#define TSI721_PC2SR_BARS 2
#define TSI721_PC2SR_WINS 8
#define TSI721_PC2SR_ZONES 8
#define TSI721_MAINT_WIN 0 /* Window for outbound maintenance requests */
#define IDB_QUEUE 0 /* Inbound Doorbell Queue to use */
#define IDB_QSIZE 512 /* Inbound Doorbell Queue size */
/* Memory space sizes */
#define TSI721_REG_SPACE_SIZE (512 * 1024) /* 512K */
#define TSI721_DB_WIN_SIZE (16 * 1024 * 1024) /* 16MB */
#define RIO_TT_CODE_8 0x00000000
#define RIO_TT_CODE_16 0x00000001
#define TSI721_DMA_MAXCH 8
#define TSI721_DMA_MINSTSSZ 32
#define TSI721_DMA_STSBLKSZ 8
#define TSI721_SRIO_MAXCH 8
#define DBELL_SID(buf) (((u8)buf[2] << 8) | (u8)buf[3])
#define DBELL_TID(buf) (((u8)buf[4] << 8) | (u8)buf[5])
#define DBELL_INF(buf) (((u8)buf[0] << 8) | (u8)buf[1])
#define TSI721_RIO_PW_MSG_SIZE 16 /* Tsi721 saves only 16 bytes of PW msg */
/* Register definitions */
/*
* Registers in PCIe configuration space
*/
#define TSI721_PCIECFG_MSIXTBL 0x0a4
#define TSI721_MSIXTBL_OFFSET 0x2c000
#define TSI721_PCIECFG_MSIXPBA 0x0a8
#define TSI721_MSIXPBA_OFFSET 0x2a000
#define TSI721_PCIECFG_EPCTL 0x400
/*
* Event Management Registers
*/
#define TSI721_RIO_EM_INT_STAT 0x10910
#define TSI721_RIO_EM_INT_STAT_PW_RX 0x00010000
#define TSI721_RIO_EM_INT_ENABLE 0x10914
#define TSI721_RIO_EM_INT_ENABLE_PW_RX 0x00010000
#define TSI721_RIO_EM_DEV_INT_EN 0x10930
#define TSI721_RIO_EM_DEV_INT_EN_INT 0x00000001
/*
* Port-Write Block Registers
*/
#define TSI721_RIO_PW_CTL 0x10a04
#define TSI721_RIO_PW_CTL_PW_TIMER 0xf0000000
#define TSI721_RIO_PW_CTL_PWT_DIS (0 << 28)
#define TSI721_RIO_PW_CTL_PWT_103 (1 << 28)
#define TSI721_RIO_PW_CTL_PWT_205 (1 << 29)
#define TSI721_RIO_PW_CTL_PWT_410 (1 << 30)
#define TSI721_RIO_PW_CTL_PWT_820 (1 << 31)
#define TSI721_RIO_PW_CTL_PWC_MODE 0x01000000
#define TSI721_RIO_PW_CTL_PWC_CONT 0x00000000
#define TSI721_RIO_PW_CTL_PWC_REL 0x01000000
#define TSI721_RIO_PW_RX_STAT 0x10a10
#define TSI721_RIO_PW_RX_STAT_WR_SIZE 0x0000f000
#define TSI_RIO_PW_RX_STAT_WDPTR 0x00000100
#define TSI721_RIO_PW_RX_STAT_PW_SHORT 0x00000008
#define TSI721_RIO_PW_RX_STAT_PW_TRUNC 0x00000004
#define TSI721_RIO_PW_RX_STAT_PW_DISC 0x00000002
#define TSI721_RIO_PW_RX_STAT_PW_VAL 0x00000001
#define TSI721_RIO_PW_RX_CAPT(x) (0x10a20 + (x)*4)
/*
* Inbound Doorbells
*/
#define TSI721_IDB_ENTRY_SIZE 64
#define TSI721_IDQ_CTL(x) (0x20000 + (x) * 1000)
#define TSI721_IDQ_SUSPEND 0x00000002
#define TSI721_IDQ_INIT 0x00000001
#define TSI721_IDQ_STS(x) (0x20004 + (x) * 1000)
#define TSI721_IDQ_RUN 0x00200000
#define TSI721_IDQ_MASK(x) (0x20008 + (x) * 1000)
#define TSI721_IDQ_MASK_MASK 0xffff0000
#define TSI721_IDQ_MASK_PATT 0x0000ffff
#define TSI721_IDQ_RP(x) (0x2000c + (x) * 1000)
#define TSI721_IDQ_RP_PTR 0x0007ffff
#define TSI721_IDQ_WP(x) (0x20010 + (x) * 1000)
#define TSI721_IDQ_WP_PTR 0x0007ffff
#define TSI721_IDQ_BASEL(x) (0x20014 + (x) * 1000)
#define TSI721_IDQ_BASEL_ADDR 0xffffffc0
#define TSI721_IDQ_BASEU(x) (0x20018 + (x) * 1000)
#define TSI721_IDQ_SIZE(x) (0x2001c + (x) * 1000)
#define TSI721_IDQ_SIZE_VAL(size) (__fls(size) - 4)
#define TSI721_IDQ_SIZE_MIN 512
#define TSI721_IDQ_SIZE_MAX (512 * 1024)
#define TSI721_SR_CHINT(x) (0x20040 + (x) * 1000)
#define TSI721_SR_CHINTE(x) (0x20044 + (x) * 1000)
#define TSI721_SR_CHINTSET(x) (0x20048 + (x) * 1000)
#define TSI721_SR_CHINT_ODBOK 0x00000020
#define TSI721_SR_CHINT_IDBQRCV 0x00000010
#define TSI721_SR_CHINT_SUSP 0x00000008
#define TSI721_SR_CHINT_ODBTO 0x00000004
#define TSI721_SR_CHINT_ODBRTRY 0x00000002
#define TSI721_SR_CHINT_ODBERR 0x00000001
#define TSI721_SR_CHINT_ALL 0x0000003f
#define TSI721_IBWIN_NUM 8
#define TSI721_IBWINLB(x) (0x29000 + (x) * 20)
#define TSI721_IBWINLB_BA 0xfffff000
#define TSI721_IBWINLB_WEN 0x00000001
#define TSI721_SR2PC_GEN_INTE 0x29800
#define TSI721_SR2PC_PWE 0x29804
#define TSI721_SR2PC_GEN_INT 0x29808
#define TSI721_DEV_INTE 0x29840
#define TSI721_DEV_INT 0x29844
#define TSI721_DEV_INTSET 0x29848
#define TSI721_DEV_INT_SMSG_CH 0x00000800
#define TSI721_DEV_INT_SMSG_NCH 0x00000400
#define TSI721_DEV_INT_SR2PC_CH 0x00000200
#define TSI721_DEV_INT_SRIO 0x00000020
#define TSI721_DEV_CHAN_INTE 0x2984c
#define TSI721_DEV_CHAN_INT 0x29850
#define TSI721_INT_SR2PC_CHAN_M 0xff000000
#define TSI721_INT_SR2PC_CHAN(x) (1 << (24 + (x)))
#define TSI721_INT_IMSG_CHAN_M 0x00ff0000
#define TSI721_INT_IMSG_CHAN(x) (1 << (16 + (x)))
#define TSI721_INT_OMSG_CHAN_M 0x0000ff00
#define TSI721_INT_OMSG_CHAN(x) (1 << (8 + (x)))
/*
* PC2SR block registers
*/
#define TSI721_OBWIN_NUM TSI721_PC2SR_WINS
#define TSI721_OBWINLB(x) (0x40000 + (x) * 20)
#define TSI721_OBWINLB_BA 0xffff8000
#define TSI721_OBWINLB_WEN 0x00000001
#define TSI721_OBWINUB(x) (0x40004 + (x) * 20)
#define TSI721_OBWINSZ(x) (0x40008 + (x) * 20)
#define TSI721_OBWINSZ_SIZE 0x00001f00
#define TSI721_OBWIN_SIZE(size) (__fls(size) - 15)
#define TSI721_ZONE_SEL 0x41300
#define TSI721_ZONE_SEL_RD_WRB 0x00020000
#define TSI721_ZONE_SEL_GO 0x00010000
#define TSI721_ZONE_SEL_WIN 0x00000038
#define TSI721_ZONE_SEL_ZONE 0x00000007
#define TSI721_LUT_DATA0 0x41304
#define TSI721_LUT_DATA0_ADD 0xfffff000
#define TSI721_LUT_DATA0_RDTYPE 0x00000f00
#define TSI721_LUT_DATA0_NREAD 0x00000100
#define TSI721_LUT_DATA0_MNTRD 0x00000200
#define TSI721_LUT_DATA0_RDCRF 0x00000020
#define TSI721_LUT_DATA0_WRCRF 0x00000010
#define TSI721_LUT_DATA0_WRTYPE 0x0000000f
#define TSI721_LUT_DATA0_NWR 0x00000001
#define TSI721_LUT_DATA0_MNTWR 0x00000002
#define TSI721_LUT_DATA0_NWR_R 0x00000004
#define TSI721_LUT_DATA1 0x41308
#define TSI721_LUT_DATA2 0x4130c
#define TSI721_LUT_DATA2_HC 0xff000000
#define TSI721_LUT_DATA2_ADD65 0x000c0000
#define TSI721_LUT_DATA2_TT 0x00030000
#define TSI721_LUT_DATA2_DSTID 0x0000ffff
#define TSI721_PC2SR_INTE 0x41310
#define TSI721_DEVCTL 0x48004
#define TSI721_DEVCTL_SRBOOT_CMPL 0x00000004
#define TSI721_I2C_INT_ENABLE 0x49120
/*
* Block DMA Engine Registers
* x = 0..7
*/
#define TSI721_DMAC_DWRCNT(x) (0x51000 + (x) * 0x1000)
#define TSI721_DMAC_DRDCNT(x) (0x51004 + (x) * 0x1000)
#define TSI721_DMAC_CTL(x) (0x51008 + (x) * 0x1000)
#define TSI721_DMAC_CTL_SUSP 0x00000002
#define TSI721_DMAC_CTL_INIT 0x00000001
#define TSI721_DMAC_INT(x) (0x5100c + (x) * 0x1000)
#define TSI721_DMAC_INT_STFULL 0x00000010
#define TSI721_DMAC_INT_DONE 0x00000008
#define TSI721_DMAC_INT_SUSP 0x00000004
#define TSI721_DMAC_INT_ERR 0x00000002
#define TSI721_DMAC_INT_IOFDONE 0x00000001
#define TSI721_DMAC_INT_ALL 0x0000001f
#define TSI721_DMAC_INTSET(x) (0x51010 + (x) * 0x1000)
#define TSI721_DMAC_STS(x) (0x51014 + (x) * 0x1000)
#define TSI721_DMAC_STS_ABORT 0x00400000
#define TSI721_DMAC_STS_RUN 0x00200000
#define TSI721_DMAC_STS_CS 0x001f0000
#define TSI721_DMAC_INTE(x) (0x51018 + (x) * 0x1000)
#define TSI721_DMAC_DPTRL(x) (0x51024 + (x) * 0x1000)
#define TSI721_DMAC_DPTRL_MASK 0xffffffe0
#define TSI721_DMAC_DPTRH(x) (0x51028 + (x) * 0x1000)
#define TSI721_DMAC_DSBL(x) (0x5102c + (x) * 0x1000)
#define TSI721_DMAC_DSBL_MASK 0xffffffc0
#define TSI721_DMAC_DSBH(x) (0x51030 + (x) * 0x1000)
#define TSI721_DMAC_DSSZ(x) (0x51034 + (x) * 0x1000)
#define TSI721_DMAC_DSSZ_SIZE_M 0x0000000f
#define TSI721_DMAC_DSSZ_SIZE(size) (__fls(size) - 4)
#define TSI721_DMAC_DSRP(x) (0x51038 + (x) * 0x1000)
#define TSI721_DMAC_DSRP_MASK 0x0007ffff
#define TSI721_DMAC_DSWP(x) (0x5103c + (x) * 0x1000)
#define TSI721_DMAC_DSWP_MASK 0x0007ffff
#define TSI721_BDMA_INTE 0x5f000
/*
* Messaging definitions
*/
#define TSI721_MSG_BUFFER_SIZE RIO_MAX_MSG_SIZE
#define TSI721_MSG_MAX_SIZE RIO_MAX_MSG_SIZE
#define TSI721_IMSG_MAXCH 8
#define TSI721_IMSG_CHNUM TSI721_IMSG_MAXCH
#define TSI721_IMSGD_MIN_RING_SIZE 32
#define TSI721_IMSGD_RING_SIZE 512
#define TSI721_OMSG_CHNUM 4 /* One channel per MBOX */
#define TSI721_OMSGD_MIN_RING_SIZE 32
#define TSI721_OMSGD_RING_SIZE 512
/*
* Outbound Messaging Engine Registers
* x = 0..7
*/
#define TSI721_OBDMAC_DWRCNT(x) (0x61000 + (x) * 0x1000)
#define TSI721_OBDMAC_DRDCNT(x) (0x61004 + (x) * 0x1000)
#define TSI721_OBDMAC_CTL(x) (0x61008 + (x) * 0x1000)
#define TSI721_OBDMAC_CTL_MASK 0x00000007
#define TSI721_OBDMAC_CTL_RETRY_THR 0x00000004
#define TSI721_OBDMAC_CTL_SUSPEND 0x00000002
#define TSI721_OBDMAC_CTL_INIT 0x00000001
#define TSI721_OBDMAC_INT(x) (0x6100c + (x) * 0x1000)
#define TSI721_OBDMAC_INTSET(x) (0x61010 + (x) * 0x1000)
#define TSI721_OBDMAC_INTE(x) (0x61018 + (x) * 0x1000)
#define TSI721_OBDMAC_INT_MASK 0x0000001F
#define TSI721_OBDMAC_INT_ST_FULL 0x00000010
#define TSI721_OBDMAC_INT_DONE 0x00000008
#define TSI721_OBDMAC_INT_SUSPENDED 0x00000004
#define TSI721_OBDMAC_INT_ERROR 0x00000002
#define TSI721_OBDMAC_INT_IOF_DONE 0x00000001
#define TSI721_OBDMAC_INT_ALL TSI721_OBDMAC_INT_MASK
#define TSI721_OBDMAC_STS(x) (0x61014 + (x) * 0x1000)
#define TSI721_OBDMAC_STS_MASK 0x007f0000
#define TSI721_OBDMAC_STS_ABORT 0x00400000
#define TSI721_OBDMAC_STS_RUN 0x00200000
#define TSI721_OBDMAC_STS_CS 0x001f0000
#define TSI721_OBDMAC_PWE(x) (0x6101c + (x) * 0x1000)
#define TSI721_OBDMAC_PWE_MASK 0x00000002
#define TSI721_OBDMAC_PWE_ERROR_EN 0x00000002
#define TSI721_OBDMAC_DPTRL(x) (0x61020 + (x) * 0x1000)
#define TSI721_OBDMAC_DPTRL_MASK 0xfffffff0
#define TSI721_OBDMAC_DPTRH(x) (0x61024 + (x) * 0x1000)
#define TSI721_OBDMAC_DPTRH_MASK 0xffffffff
#define TSI721_OBDMAC_DSBL(x) (0x61040 + (x) * 0x1000)
#define TSI721_OBDMAC_DSBL_MASK 0xffffffc0
#define TSI721_OBDMAC_DSBH(x) (0x61044 + (x) * 0x1000)
#define TSI721_OBDMAC_DSBH_MASK 0xffffffff
#define TSI721_OBDMAC_DSSZ(x) (0x61048 + (x) * 0x1000)
#define TSI721_OBDMAC_DSSZ_MASK 0x0000000f
#define TSI721_OBDMAC_DSRP(x) (0x6104c + (x) * 0x1000)
#define TSI721_OBDMAC_DSRP_MASK 0x0007ffff
#define TSI721_OBDMAC_DSWP(x) (0x61050 + (x) * 0x1000)
#define TSI721_OBDMAC_DSWP_MASK 0x0007ffff
#define TSI721_RQRPTO 0x60010
#define TSI721_RQRPTO_MASK 0x00ffffff
#define TSI721_RQRPTO_VAL 400 /* Response TO value */
/*
* Inbound Messaging Engine Registers
* x = 0..7
*/
#define TSI721_IB_DEVID_GLOBAL 0xffff
#define TSI721_IBDMAC_FQBL(x) (0x61200 + (x) * 0x1000)
#define TSI721_IBDMAC_FQBL_MASK 0xffffffc0
#define TSI721_IBDMAC_FQBH(x) (0x61204 + (x) * 0x1000)
#define TSI721_IBDMAC_FQBH_MASK 0xffffffff
#define TSI721_IBDMAC_FQSZ_ENTRY_INX TSI721_IMSGD_RING_SIZE
#define TSI721_IBDMAC_FQSZ(x) (0x61208 + (x) * 0x1000)
#define TSI721_IBDMAC_FQSZ_MASK 0x0000000f
#define TSI721_IBDMAC_FQRP(x) (0x6120c + (x) * 0x1000)
#define TSI721_IBDMAC_FQRP_MASK 0x0007ffff
#define TSI721_IBDMAC_FQWP(x) (0x61210 + (x) * 0x1000)
#define TSI721_IBDMAC_FQWP_MASK 0x0007ffff
#define TSI721_IBDMAC_FQTH(x) (0x61214 + (x) * 0x1000)
#define TSI721_IBDMAC_FQTH_MASK 0x0007ffff
#define TSI721_IB_DEVID 0x60020
#define TSI721_IB_DEVID_MASK 0x0000ffff
#define TSI721_IBDMAC_CTL(x) (0x61240 + (x) * 0x1000)
#define TSI721_IBDMAC_CTL_MASK 0x00000003
#define TSI721_IBDMAC_CTL_SUSPEND 0x00000002
#define TSI721_IBDMAC_CTL_INIT 0x00000001
#define TSI721_IBDMAC_STS(x) (0x61244 + (x) * 0x1000)
#define TSI721_IBDMAC_STS_MASK 0x007f0000
#define TSI721_IBSMAC_STS_ABORT 0x00400000
#define TSI721_IBSMAC_STS_RUN 0x00200000
#define TSI721_IBSMAC_STS_CS 0x001f0000
#define TSI721_IBDMAC_INT(x) (0x61248 + (x) * 0x1000)
#define TSI721_IBDMAC_INTSET(x) (0x6124c + (x) * 0x1000)
#define TSI721_IBDMAC_INTE(x) (0x61250 + (x) * 0x1000)
#define TSI721_IBDMAC_INT_MASK 0x0000100f
#define TSI721_IBDMAC_INT_SRTO 0x00001000
#define TSI721_IBDMAC_INT_SUSPENDED 0x00000008
#define TSI721_IBDMAC_INT_PC_ERROR 0x00000004
#define TSI721_IBDMAC_INT_FQ_LOW 0x00000002
#define TSI721_IBDMAC_INT_DQ_RCV 0x00000001
#define TSI721_IBDMAC_INT_ALL TSI721_IBDMAC_INT_MASK
#define TSI721_IBDMAC_PWE(x) (0x61254 + (x) * 0x1000)
#define TSI721_IBDMAC_PWE_MASK 0x00001700
#define TSI721_IBDMAC_PWE_SRTO 0x00001000
#define TSI721_IBDMAC_PWE_ILL_FMT 0x00000400
#define TSI721_IBDMAC_PWE_ILL_DEC 0x00000200
#define TSI721_IBDMAC_PWE_IMP_SP 0x00000100
#define TSI721_IBDMAC_DQBL(x) (0x61300 + (x) * 0x1000)
#define TSI721_IBDMAC_DQBL_MASK 0xffffffc0
#define TSI721_IBDMAC_DQBL_ADDR 0xffffffc0
#define TSI721_IBDMAC_DQBH(x) (0x61304 + (x) * 0x1000)
#define TSI721_IBDMAC_DQBH_MASK 0xffffffff
#define TSI721_IBDMAC_DQRP(x) (0x61308 + (x) * 0x1000)
#define TSI721_IBDMAC_DQRP_MASK 0x0007ffff
#define TSI721_IBDMAC_DQWR(x) (0x6130c + (x) * 0x1000)
#define TSI721_IBDMAC_DQWR_MASK 0x0007ffff
#define TSI721_IBDMAC_DQSZ(x) (0x61314 + (x) * 0x1000)
#define TSI721_IBDMAC_DQSZ_MASK 0x0000000f
/*
* Messaging Engine Interrupts
*/
#define TSI721_SMSG_PWE 0x6a004
#define TSI721_SMSG_INTE 0x6a000
#define TSI721_SMSG_INT 0x6a008
#define TSI721_SMSG_INTSET 0x6a010
#define TSI721_SMSG_INT_MASK 0x0086ffff
#define TSI721_SMSG_INT_UNS_RSP 0x00800000
#define TSI721_SMSG_INT_ECC_NCOR 0x00040000
#define TSI721_SMSG_INT_ECC_COR 0x00020000
#define TSI721_SMSG_INT_ECC_NCOR_CH 0x0000ff00
#define TSI721_SMSG_INT_ECC_COR_CH 0x000000ff
#define TSI721_SMSG_ECC_LOG 0x6a014
#define TSI721_SMSG_ECC_LOG_MASK 0x00070007
#define TSI721_SMSG_ECC_LOG_ECC_NCOR_M 0x00070000
#define TSI721_SMSG_ECC_LOG_ECC_COR_M 0x00000007
#define TSI721_RETRY_GEN_CNT 0x6a100
#define TSI721_RETRY_GEN_CNT_MASK 0xffffffff
#define TSI721_RETRY_RX_CNT 0x6a104
#define TSI721_RETRY_RX_CNT_MASK 0xffffffff
#define TSI721_SMSG_ECC_COR_LOG(x) (0x6a300 + (x) * 4)
#define TSI721_SMSG_ECC_COR_LOG_MASK 0x000000ff
#define TSI721_SMSG_ECC_NCOR(x) (0x6a340 + (x) * 4)
#define TSI721_SMSG_ECC_NCOR_MASK 0x000000ff
/*
* Block DMA Descriptors
*/
struct tsi721_dma_desc {
__le32 type_id;
#define TSI721_DMAD_DEVID 0x0000ffff
#define TSI721_DMAD_CRF 0x00010000
#define TSI721_DMAD_PRIO 0x00060000
#define TSI721_DMAD_RTYPE 0x00780000
#define TSI721_DMAD_IOF 0x08000000
#define TSI721_DMAD_DTYPE 0xe0000000
__le32 bcount;
#define TSI721_DMAD_BCOUNT1 0x03ffffff /* if DTYPE == 1 */
#define TSI721_DMAD_BCOUNT2 0x0000000f /* if DTYPE == 2 */
#define TSI721_DMAD_TT 0x0c000000
#define TSI721_DMAD_RADDR0 0xc0000000
union {
__le32 raddr_lo; /* if DTYPE == (1 || 2) */
__le32 next_lo; /* if DTYPE == 3 */
};
#define TSI721_DMAD_CFGOFF 0x00ffffff
#define TSI721_DMAD_HOPCNT 0xff000000
union {
__le32 raddr_hi; /* if DTYPE == (1 || 2) */
__le32 next_hi; /* if DTYPE == 3 */
};
union {
struct { /* if DTYPE == 1 */
__le32 bufptr_lo;
__le32 bufptr_hi;
__le32 s_dist;
__le32 s_size;
} t1;
__le32 data[4]; /* if DTYPE == 2 */
u32 reserved[4]; /* if DTYPE == 3 */
};
} __aligned(32);
/*
* Inbound Messaging Descriptor
*/
struct tsi721_imsg_desc {
__le32 type_id;
#define TSI721_IMD_DEVID 0x0000ffff
#define TSI721_IMD_CRF 0x00010000
#define TSI721_IMD_PRIO 0x00060000
#define TSI721_IMD_TT 0x00180000
#define TSI721_IMD_DTYPE 0xe0000000
__le32 msg_info;
#define TSI721_IMD_BCOUNT 0x00000ff8
#define TSI721_IMD_SSIZE 0x0000f000
#define TSI721_IMD_LETER 0x00030000
#define TSI721_IMD_XMBOX 0x003c0000
#define TSI721_IMD_MBOX 0x00c00000
#define TSI721_IMD_CS 0x78000000
#define TSI721_IMD_HO 0x80000000
__le32 bufptr_lo;
__le32 bufptr_hi;
u32 reserved[12];
} __aligned(64);
/*
* Outbound Messaging Descriptor
*/
struct tsi721_omsg_desc {
__le32 type_id;
#define TSI721_OMD_DEVID 0x0000ffff
#define TSI721_OMD_CRF 0x00010000
#define TSI721_OMD_PRIO 0x00060000
#define TSI721_OMD_IOF 0x08000000
#define TSI721_OMD_DTYPE 0xe0000000
#define TSI721_OMD_RSRVD 0x17f80000
__le32 msg_info;
#define TSI721_OMD_BCOUNT 0x00000ff8
#define TSI721_OMD_SSIZE 0x0000f000
#define TSI721_OMD_LETER 0x00030000
#define TSI721_OMD_XMBOX 0x003c0000
#define TSI721_OMD_MBOX 0x00c00000
#define TSI721_OMD_TT 0x0c000000
union {
__le32 bufptr_lo; /* if DTYPE == 4 */
__le32 next_lo; /* if DTYPE == 5 */
};
union {
__le32 bufptr_hi; /* if DTYPE == 4 */
__le32 next_hi; /* if DTYPE == 5 */
};
} __aligned(16);
struct tsi721_dma_sts {
__le64 desc_sts[8];
} __aligned(64);
struct tsi721_desc_sts_fifo {
union {
__le64 da64;
struct {
__le32 lo;
__le32 hi;
} da32;
} stat[8];
} __aligned(64);
/* Descriptor types for BDMA and Messaging blocks */
enum dma_dtype {
DTYPE1 = 1, /* Data Transfer DMA Descriptor */
DTYPE2 = 2, /* Immediate Data Transfer DMA Descriptor */
DTYPE3 = 3, /* Block Pointer DMA Descriptor */
DTYPE4 = 4, /* Outbound Msg DMA Descriptor */
DTYPE5 = 5, /* OB Messaging Block Pointer Descriptor */
DTYPE6 = 6 /* Inbound Messaging Descriptor */
};
enum dma_rtype {
NREAD = 0,
LAST_NWRITE_R = 1,
ALL_NWRITE = 2,
ALL_NWRITE_R = 3,
MAINT_RD = 4,
MAINT_WR = 5
};
/*
* mport Driver Definitions
*/
#define TSI721_DMA_CHNUM TSI721_DMA_MAXCH
#define TSI721_DMACH_MAINT 0 /* DMA channel for maint requests */
#define TSI721_DMACH_MAINT_NBD 32 /* Number of BDs for maint requests */
#define MSG_DMA_ENTRY_INX_TO_SIZE(x) ((0x10 << (x)) & 0xFFFF0)
enum tsi721_smsg_int_flag {
SMSG_INT_NONE = 0x00000000,
SMSG_INT_ECC_COR_CH = 0x000000ff,
SMSG_INT_ECC_NCOR_CH = 0x0000ff00,
SMSG_INT_ECC_COR = 0x00020000,
SMSG_INT_ECC_NCOR = 0x00040000,
SMSG_INT_UNS_RSP = 0x00800000,
SMSG_INT_ALL = 0x0006ffff
};
/* Structures */
struct tsi721_bdma_chan {
int bd_num; /* number of buffer descriptors */
void *bd_base; /* start of DMA descriptors */
dma_addr_t bd_phys;
void *sts_base; /* start of DMA BD status FIFO */
dma_addr_t sts_phys;
int sts_size;
};
struct tsi721_imsg_ring {
u32 size;
/* VA/PA of data buffers for incoming messages */
void *buf_base;
dma_addr_t buf_phys;
/* VA/PA of circular free buffer list */
void *imfq_base;
dma_addr_t imfq_phys;
/* VA/PA of Inbound message descriptors */
void *imd_base;
dma_addr_t imd_phys;
/* Inbound Queue buffer pointers */
void *imq_base[TSI721_IMSGD_RING_SIZE];
u32 rx_slot;
void *dev_id;
u32 fq_wrptr;
u32 desc_rdptr;
spinlock_t lock;
};
struct tsi721_omsg_ring {
u32 size;
/* VA/PA of OB Msg descriptors */
void *omd_base;
dma_addr_t omd_phys;
/* VA/PA of OB Msg data buffers */
void *omq_base[TSI721_OMSGD_RING_SIZE];
dma_addr_t omq_phys[TSI721_OMSGD_RING_SIZE];
/* VA/PA of OB Msg descriptor status FIFO */
void *sts_base;
dma_addr_t sts_phys;
u32 sts_size; /* # of allocated status entries */
u32 sts_rdptr;
u32 tx_slot;
void *dev_id;
u32 wr_count;
spinlock_t lock;
};
enum tsi721_flags {
TSI721_USING_MSI = (1 << 0),
TSI721_USING_MSIX = (1 << 1),
TSI721_IMSGID_SET = (1 << 2),
};
#ifdef CONFIG_PCI_MSI
/*
* MSI-X Table Entries (0 ... 69)
*/
#define TSI721_MSIX_DMACH_DONE(x) (0 + (x))
#define TSI721_MSIX_DMACH_INT(x) (8 + (x))
#define TSI721_MSIX_BDMA_INT 16
#define TSI721_MSIX_OMSG_DONE(x) (17 + (x))
#define TSI721_MSIX_OMSG_INT(x) (25 + (x))
#define TSI721_MSIX_IMSG_DQ_RCV(x) (33 + (x))
#define TSI721_MSIX_IMSG_INT(x) (41 + (x))
#define TSI721_MSIX_MSG_INT 49
#define TSI721_MSIX_SR2PC_IDBQ_RCV(x) (50 + (x))
#define TSI721_MSIX_SR2PC_CH_INT(x) (58 + (x))
#define TSI721_MSIX_SR2PC_INT 66
#define TSI721_MSIX_PC2SR_INT 67
#define TSI721_MSIX_SRIO_MAC_INT 68
#define TSI721_MSIX_I2C_INT 69
/* MSI-X vector and init table entry indexes */
enum tsi721_msix_vect {
TSI721_VECT_IDB,
TSI721_VECT_PWRX, /* PW_RX is part of SRIO MAC Interrupt reporting */
TSI721_VECT_OMB0_DONE,
TSI721_VECT_OMB1_DONE,
TSI721_VECT_OMB2_DONE,
TSI721_VECT_OMB3_DONE,
TSI721_VECT_OMB0_INT,
TSI721_VECT_OMB1_INT,
TSI721_VECT_OMB2_INT,
TSI721_VECT_OMB3_INT,
TSI721_VECT_IMB0_RCV,
TSI721_VECT_IMB1_RCV,
TSI721_VECT_IMB2_RCV,
TSI721_VECT_IMB3_RCV,
TSI721_VECT_IMB0_INT,
TSI721_VECT_IMB1_INT,
TSI721_VECT_IMB2_INT,
TSI721_VECT_IMB3_INT,
TSI721_VECT_MAX
};
#define IRQ_DEVICE_NAME_MAX 64
struct msix_irq {
u16 vector;
char irq_name[IRQ_DEVICE_NAME_MAX];
};
#endif /* CONFIG_PCI_MSI */
struct tsi721_device {
struct pci_dev *pdev;
struct rio_mport *mport;
u32 flags;
void __iomem *regs;
#ifdef CONFIG_PCI_MSI
struct msix_irq msix[TSI721_VECT_MAX];
#endif
/* Doorbells */
void __iomem *odb_base;
void *idb_base;
dma_addr_t idb_dma;
struct work_struct idb_work;
u32 db_discard_count;
/* Inbound Port-Write */
struct work_struct pw_work;
struct kfifo pw_fifo;
spinlock_t pw_fifo_lock;
u32 pw_discard_count;
/* BDMA Engine */
struct tsi721_bdma_chan bdma[TSI721_DMA_CHNUM];
/* Inbound Messaging */
int imsg_init[TSI721_IMSG_CHNUM];
struct tsi721_imsg_ring imsg_ring[TSI721_IMSG_CHNUM];
/* Outbound Messaging */
int omsg_init[TSI721_OMSG_CHNUM];
struct tsi721_omsg_ring omsg_ring[TSI721_OMSG_CHNUM];
};
#endif

6
drivers/rapidio/rio-scan.c
View file

@ -516,7 +516,7 @@ static struct rio_dev __devinit *rio_setup_device(struct rio_net *net,
return rdev;
cleanup:
if (rio_is_switch(rdev))
if (rswitch)
kfree(rswitch->route_table);
kfree(rdev);
@ -923,7 +923,7 @@ static int __devinit rio_enum_peer(struct rio_net *net, struct rio_mport *port,
* rio_enum_complete- Tests if enumeration of a network is complete
* @port: Master port to send transaction
*
* Tests the Component Tag CSR for non-zero value (enumeration
* Tests the PGCCSR discovered bit for non-zero value (enumeration
* complete flag). Return %1 if enumeration is complete or %0 if
* enumeration is incomplete.
*/
@ -933,7 +933,7 @@ static int rio_enum_complete(struct rio_mport *port)
rio_local_read_config_32(port, port->phys_efptr + RIO_PORT_GEN_CTL_CSR,
&regval);
return (regval & RIO_PORT_GEN_MASTER) ? 1 : 0;
return (regval & RIO_PORT_GEN_DISCOVERED) ? 1 : 0;
}
/**

32
drivers/rtc/class.c
View file

@ -21,16 +21,13 @@
#include "rtc-core.h"
static DEFINE_IDR(rtc_idr);
static DEFINE_MUTEX(idr_lock);
static DEFINE_IDA(rtc_ida);
struct class *rtc_class;
static void rtc_device_release(struct device *dev)
{
struct rtc_device *rtc = to_rtc_device(dev);
mutex_lock(&idr_lock);
idr_remove(&rtc_idr, rtc->id);
mutex_unlock(&idr_lock);
ida_simple_remove(&rtc_ida, rtc->id);
kfree(rtc);
}
@ -146,25 +143,16 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev,
struct rtc_wkalrm alrm;
int id, err;
if (idr_pre_get(&rtc_idr, GFP_KERNEL) == 0) {
err = -ENOMEM;
id = ida_simple_get(&rtc_ida, 0, 0, GFP_KERNEL);
if (id < 0) {
err = id;
goto exit;
}
mutex_lock(&idr_lock);
err = idr_get_new(&rtc_idr, NULL, &id);
mutex_unlock(&idr_lock);
if (err < 0)
goto exit;
id = id & MAX_ID_MASK;
rtc = kzalloc(sizeof(struct rtc_device), GFP_KERNEL);
if (rtc == NULL) {
err = -ENOMEM;
goto exit_idr;
goto exit_ida;
}
rtc->id = id;
@ -222,10 +210,8 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev,
exit_kfree:
kfree(rtc);
exit_idr:
mutex_lock(&idr_lock);
idr_remove(&rtc_idr, id);
mutex_unlock(&idr_lock);
exit_ida:
ida_simple_remove(&rtc_ida, id);
exit:
dev_err(dev, "rtc core: unable to register %s, err = %d\n",
@ -276,7 +262,7 @@ static void __exit rtc_exit(void)
{
rtc_dev_exit();
class_destroy(rtc_class);
idr_destroy(&rtc_idr);
ida_destroy(&rtc_ida);
}
subsys_initcall(rtc_init);

27
drivers/rtc/rtc-ds1307.c
View file

@ -34,6 +34,7 @@ enum ds_type {
ds_1388,
ds_3231,
m41t00,
mcp7941x,
rx_8025,
// rs5c372 too? different address...
};
@ -43,6 +44,7 @@ enum ds_type {
#define DS1307_REG_SECS 0x00 /* 00-59 */
# define DS1307_BIT_CH 0x80
# define DS1340_BIT_nEOSC 0x80
# define MCP7941X_BIT_ST 0x80
#define DS1307_REG_MIN 0x01 /* 00-59 */
#define DS1307_REG_HOUR 0x02 /* 00-23, or 1-12{am,pm} */
# define DS1307_BIT_12HR 0x40 /* in REG_HOUR */
@ -50,6 +52,7 @@ enum ds_type {
# define DS1340_BIT_CENTURY_EN 0x80 /* in REG_HOUR */
# define DS1340_BIT_CENTURY 0x40 /* in REG_HOUR */
#define DS1307_REG_WDAY 0x03 /* 01-07 */
# define MCP7941X_BIT_VBATEN 0x08
#define DS1307_REG_MDAY 0x04 /* 01-31 */
#define DS1307_REG_MONTH 0x05 /* 01-12 */
# define DS1337_BIT_CENTURY 0x80 /* in REG_MONTH */
@ -137,6 +140,8 @@ static const struct chip_desc chips[] = {
},
[m41t00] = {
},
[mcp7941x] = {
},
[rx_8025] = {
}, };
@ -149,6 +154,7 @@ static const struct i2c_device_id ds1307_id[] = {
{ "ds1340", ds_1340 },
{ "ds3231", ds_3231 },
{ "m41t00", m41t00 },
{ "mcp7941x", mcp7941x },
{ "pt7c4338", ds_1307 },
{ "rx8025", rx_8025 },
{ }
@ -365,6 +371,10 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
buf[DS1307_REG_HOUR] |= DS1340_BIT_CENTURY_EN
| DS1340_BIT_CENTURY;
break;
case mcp7941x:
buf[DS1307_REG_SECS] |= MCP7941X_BIT_ST;
buf[DS1307_REG_WDAY] |= MCP7941X_BIT_VBATEN;
break;
default:
break;
}
@ -808,6 +818,23 @@ static int __devinit ds1307_probe(struct i2c_client *client,
i2c_smbus_write_byte_data(client, DS1340_REG_FLAG, 0);
dev_warn(&client->dev, "SET TIME!\n");
}
break;
case mcp7941x:
/* make sure that the backup battery is enabled */
if (!(ds1307->regs[DS1307_REG_WDAY] & MCP7941X_BIT_VBATEN)) {
i2c_smbus_write_byte_data(client, DS1307_REG_WDAY,
ds1307->regs[DS1307_REG_WDAY]
| MCP7941X_BIT_VBATEN);
}
/* clock halted? turn it on, so clock can tick. */
if (!(tmp & MCP7941X_BIT_ST)) {
i2c_smbus_write_byte_data(client, DS1307_REG_SECS,
MCP7941X_BIT_ST);
dev_warn(&client->dev, "SET TIME!\n");
goto read_rtc;
}
break;
case rx_8025:
case ds_1337:

6
drivers/rtc/rtc-mc13xxx.c
View file

@ -309,7 +309,7 @@ static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev)
return IRQ_HANDLED;
}
static int __devinit mc13xxx_rtc_probe(struct platform_device *pdev)
static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
{
int ret;
struct mc13xxx_rtc *priv;
@ -378,7 +378,7 @@ static int __devinit mc13xxx_rtc_probe(struct platform_device *pdev)
return ret;
}
static int __devexit mc13xxx_rtc_remove(struct platform_device *pdev)
static int __exit mc13xxx_rtc_remove(struct platform_device *pdev)
{
struct mc13xxx_rtc *priv = platform_get_drvdata(pdev);
@ -410,7 +410,7 @@ const struct platform_device_id mc13xxx_rtc_idtable[] = {
static struct platform_driver mc13xxx_rtc_driver = {
.id_table = mc13xxx_rtc_idtable,
.remove = __devexit_p(mc13xxx_rtc_remove),
.remove = __exit_p(mc13xxx_rtc_remove),
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,

48
drivers/w1/slaves/w1_ds2760.c
View file

@ -114,43 +114,7 @@ static struct bin_attribute w1_ds2760_bin_attr = {
.read = w1_ds2760_read_bin,
};
static DEFINE_IDR(bat_idr);
static DEFINE_MUTEX(bat_idr_lock);
static int new_bat_id(void)
{
int ret;
while (1) {
int id;
ret = idr_pre_get(&bat_idr, GFP_KERNEL);
if (ret == 0)
return -ENOMEM;
mutex_lock(&bat_idr_lock);
ret = idr_get_new(&bat_idr, NULL, &id);
mutex_unlock(&bat_idr_lock);
if (ret == 0) {
ret = id & MAX_ID_MASK;
break;
} else if (ret == -EAGAIN) {
continue;
} else {
break;
}
}
return ret;
}
static void release_bat_id(int id)
{
mutex_lock(&bat_idr_lock);
idr_remove(&bat_idr, id);
mutex_unlock(&bat_idr_lock);
}
static DEFINE_IDA(bat_ida);
static int w1_ds2760_add_slave(struct w1_slave *sl)
{
@ -158,7 +122,7 @@ static int w1_ds2760_add_slave(struct w1_slave *sl)
int id;
struct platform_device *pdev;
id = new_bat_id();
id = ida_simple_get(&bat_ida, 0, 0, GFP_KERNEL);
if (id < 0) {
ret = id;
goto noid;
@ -187,7 +151,7 @@ static int w1_ds2760_add_slave(struct w1_slave *sl)
pdev_add_failed:
platform_device_unregister(pdev);
pdev_alloc_failed:
release_bat_id(id);
ida_simple_remove(&bat_ida, id);
noid:
success:
return ret;
@ -199,7 +163,7 @@ static void w1_ds2760_remove_slave(struct w1_slave *sl)
int id = pdev->id;
platform_device_unregister(pdev);
release_bat_id(id);
ida_simple_remove(&bat_ida, id);
sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2760_bin_attr);
}
@ -217,14 +181,14 @@ static int __init w1_ds2760_init(void)
{
printk(KERN_INFO "1-Wire driver for the DS2760 battery monitor "
" chip - (c) 2004-2005, Szabolcs Gyurko\n");
idr_init(&bat_idr);
ida_init(&bat_ida);
return w1_register_family(&w1_ds2760_family);
}
static void __exit w1_ds2760_exit(void)
{
w1_unregister_family(&w1_ds2760_family);
idr_destroy(&bat_idr);
ida_destroy(&bat_ida);
}
EXPORT_SYMBOL(w1_ds2760_read);

98
drivers/w1/slaves/w1_ds2780.c
View file

@ -26,20 +26,14 @@
#include "../w1_family.h"
#include "w1_ds2780.h"
int w1_ds2780_io(struct device *dev, char *buf, int addr, size_t count,
int io)
static int w1_ds2780_do_io(struct device *dev, char *buf, int addr,
size_t count, int io)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
if (!dev)
return -ENODEV;
if (addr > DS2780_DATA_SIZE || addr < 0)
return 0;
mutex_lock(&sl->master->mutex);
if (addr > DS2780_DATA_SIZE || addr < 0) {
count = 0;
goto out;
}
count = min_t(int, count, DS2780_DATA_SIZE - addr);
if (w1_reset_select_slave(sl) == 0) {
@ -47,7 +41,6 @@ int w1_ds2780_io(struct device *dev, char *buf, int addr, size_t count,
w1_write_8(sl->master, W1_DS2780_WRITE_DATA);
w1_write_8(sl->master, addr);
w1_write_block(sl->master, buf, count);
/* XXX w1_write_block returns void, not n_written */
} else {
w1_write_8(sl->master, W1_DS2780_READ_DATA);
w1_write_8(sl->master, addr);
@ -55,13 +48,42 @@ int w1_ds2780_io(struct device *dev, char *buf, int addr, size_t count,
}
}
out:
mutex_unlock(&sl->master->mutex);
return count;
}
int w1_ds2780_io(struct device *dev, char *buf, int addr, size_t count,
int io)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
int ret;
if (!dev)
return -ENODEV;
mutex_lock(&sl->master->mutex);
ret = w1_ds2780_do_io(dev, buf, addr, count, io);
mutex_unlock(&sl->master->mutex);
return ret;
}
EXPORT_SYMBOL(w1_ds2780_io);
int w1_ds2780_io_nolock(struct device *dev, char *buf, int addr, size_t count,
int io)
{
int ret;
if (!dev)
return -ENODEV;
ret = w1_ds2780_do_io(dev, buf, addr, count, io);
return ret;
}
EXPORT_SYMBOL(w1_ds2780_io_nolock);
int w1_ds2780_eeprom_cmd(struct device *dev, int addr, int cmd)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
@ -99,43 +121,7 @@ static struct bin_attribute w1_ds2780_bin_attr = {
.read = w1_ds2780_read_bin,
};
static DEFINE_IDR(bat_idr);
static DEFINE_MUTEX(bat_idr_lock);
static int new_bat_id(void)
{
int ret;
while (1) {
int id;
ret = idr_pre_get(&bat_idr, GFP_KERNEL);
if (ret == 0)
return -ENOMEM;
mutex_lock(&bat_idr_lock);
ret = idr_get_new(&bat_idr, NULL, &id);
mutex_unlock(&bat_idr_lock);
if (ret == 0) {
ret = id & MAX_ID_MASK;
break;
} else if (ret == -EAGAIN) {
continue;
} else {
break;
}
}
return ret;
}
static void release_bat_id(int id)
{
mutex_lock(&bat_idr_lock);
idr_remove(&bat_idr, id);
mutex_unlock(&bat_idr_lock);
}
static DEFINE_IDA(bat_ida);
static int w1_ds2780_add_slave(struct w1_slave *sl)
{
@ -143,7 +129,7 @@ static int w1_ds2780_add_slave(struct w1_slave *sl)
int id;
struct platform_device *pdev;
id = new_bat_id();
id = ida_simple_get(&bat_ida, 0, 0, GFP_KERNEL);
if (id < 0) {
ret = id;
goto noid;
@ -172,7 +158,7 @@ static int w1_ds2780_add_slave(struct w1_slave *sl)
pdev_add_failed:
platform_device_unregister(pdev);
pdev_alloc_failed:
release_bat_id(id);
ida_simple_remove(&bat_ida, id);
noid:
return ret;
}
@ -183,7 +169,7 @@ static void w1_ds2780_remove_slave(struct w1_slave *sl)
int id = pdev->id;
platform_device_unregister(pdev);
release_bat_id(id);
ida_simple_remove(&bat_ida, id);
sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2780_bin_attr);
}
@ -199,14 +185,14 @@ static struct w1_family w1_ds2780_family = {
static int __init w1_ds2780_init(void)
{
idr_init(&bat_idr);
ida_init(&bat_ida);
return w1_register_family(&w1_ds2780_family);
}
static void __exit w1_ds2780_exit(void)
{
w1_unregister_family(&w1_ds2780_family);
idr_destroy(&bat_idr);
ida_destroy(&bat_ida);
}
module_init(w1_ds2780_init);

2
drivers/w1/slaves/w1_ds2780.h
View file

@ -124,6 +124,8 @@
extern int w1_ds2780_io(struct device *dev, char *buf, int addr, size_t count,
int io);
extern int w1_ds2780_io_nolock(struct device *dev, char *buf, int addr,
size_t count, int io);
extern int w1_ds2780_eeprom_cmd(struct device *dev, int addr, int cmd);
#endif /* !_W1_DS2780_H */

1
drivers/w1/w1_int.c
View file

@ -78,6 +78,7 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
memcpy(&dev->dev, device, sizeof(struct device));
dev_set_name(&dev->dev, "w1_bus_master%u", dev->id);
snprintf(dev->name, sizeof(dev->name), "w1_bus_master%u", dev->id);
dev->dev.init_name = dev->name;
dev->driver = driver;

5
drivers/w1/w1_io.c
View file

@ -158,13 +158,18 @@ EXPORT_SYMBOL_GPL(w1_write_8);
static u8 w1_read_bit(struct w1_master *dev)
{
int result;
unsigned long flags;
/* sample timing is critical here */
local_irq_save(flags);
dev->bus_master->write_bit(dev->bus_master->data, 0);
w1_delay(6);
dev->bus_master->write_bit(dev->bus_master->data, 1);
w1_delay(9);
result = dev->bus_master->read_bit(dev->bus_master->data);
local_irq_restore(flags);
w1_delay(55);
return result & 0x1;

146
fs/aio.c
View file

@ -440,8 +440,6 @@ void exit_aio(struct mm_struct *mm)
static struct kiocb *__aio_get_req(struct kioctx *ctx)
{
struct kiocb *req = NULL;
struct aio_ring *ring;
int okay = 0;
req = kmem_cache_alloc(kiocb_cachep, GFP_KERNEL);
if (unlikely(!req))
@ -459,39 +457,114 @@ static struct kiocb *__aio_get_req(struct kioctx *ctx)
INIT_LIST_HEAD(&req->ki_run_list);
req->ki_eventfd = NULL;
/* Check if the completion queue has enough free space to
* accept an event from this io.
*/
spin_lock_irq(&ctx->ctx_lock);
ring = kmap_atomic(ctx->ring_info.ring_pages[0], KM_USER0);
if (ctx->reqs_active < aio_ring_avail(&ctx->ring_info, ring)) {
list_add(&req->ki_list, &ctx->active_reqs);
ctx->reqs_active++;
okay = 1;
}
kunmap_atomic(ring, KM_USER0);
spin_unlock_irq(&ctx->ctx_lock);
if (!okay) {
kmem_cache_free(kiocb_cachep, req);
req = NULL;
}
return req;
}
static inline struct kiocb *aio_get_req(struct kioctx *ctx)
/*
* struct kiocb's are allocated in batches to reduce the number of
* times the ctx lock is acquired and released.
*/
#define KIOCB_BATCH_SIZE 32L
struct kiocb_batch {
struct list_head head;
long count; /* number of requests left to allocate */
};
static void kiocb_batch_init(struct kiocb_batch *batch, long total)
{
INIT_LIST_HEAD(&batch->head);
batch->count = total;
}
static void kiocb_batch_free(struct kiocb_batch *batch)
{
struct kiocb *req, *n;
list_for_each_entry_safe(req, n, &batch->head, ki_batch) {
list_del(&req->ki_batch);
kmem_cache_free(kiocb_cachep, req);
}
}
/*
* Allocate a batch of kiocbs. This avoids taking and dropping the
* context lock a lot during setup.
*/
static int kiocb_batch_refill(struct kioctx *ctx, struct kiocb_batch *batch)
{
unsigned short allocated, to_alloc;
long avail;
bool called_fput = false;
struct kiocb *req, *n;
struct aio_ring *ring;
to_alloc = min(batch->count, KIOCB_BATCH_SIZE);
for (allocated = 0; allocated < to_alloc; allocated++) {
req = __aio_get_req(ctx);
if (!req)
/* allocation failed, go with what we've got */
break;
list_add(&req->ki_batch, &batch->head);
}
if (allocated == 0)
goto out;
retry:
spin_lock_irq(&ctx->ctx_lock);
ring = kmap_atomic(ctx->ring_info.ring_pages[0]);
avail = aio_ring_avail(&ctx->ring_info, ring) - ctx->reqs_active;
BUG_ON(avail < 0);
if (avail == 0 && !called_fput) {
/*
* Handle a potential starvation case. It is possible that
* we hold the last reference on a struct file, causing us
* to delay the final fput to non-irq context. In this case,
* ctx->reqs_active is artificially high. Calling the fput
* routine here may free up a slot in the event completion
* ring, allowing this allocation to succeed.
*/
kunmap_atomic(ring);
spin_unlock_irq(&ctx->ctx_lock);
aio_fput_routine(NULL);
called_fput = true;
goto retry;
}
if (avail < allocated) {
/* Trim back the number of requests. */
list_for_each_entry_safe(req, n, &batch->head, ki_batch) {
list_del(&req->ki_batch);
kmem_cache_free(kiocb_cachep, req);
if (--allocated <= avail)
break;
}
}
batch->count -= allocated;
list_for_each_entry(req, &batch->head, ki_batch) {
list_add(&req->ki_list, &ctx->active_reqs);
ctx->reqs_active++;
}
kunmap_atomic(ring);
spin_unlock_irq(&ctx->ctx_lock);
out:
return allocated;
}
static inline struct kiocb *aio_get_req(struct kioctx *ctx,
struct kiocb_batch *batch)
{
struct kiocb *req;
/* Handle a potential starvation case -- should be exceedingly rare as
* requests will be stuck on fput_head only if the aio_fput_routine is
* delayed and the requests were the last user of the struct file.
*/
req = __aio_get_req(ctx);
if (unlikely(NULL == req)) {
aio_fput_routine(NULL);
req = __aio_get_req(ctx);
}
if (list_empty(&batch->head))
if (kiocb_batch_refill(ctx, batch) == 0)
return NULL;
req = list_first_entry(&batch->head, struct kiocb, ki_batch);
list_del(&req->ki_batch);
return req;
}
@ -1515,7 +1588,8 @@ static ssize_t aio_setup_iocb(struct kiocb *kiocb, bool compat)
}
static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
struct iocb *iocb, bool compat)
struct iocb *iocb, struct kiocb_batch *batch,
bool compat)
{
struct kiocb *req;
struct file *file;
@ -1541,7 +1615,7 @@ static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
if (unlikely(!file))
return -EBADF;
req = aio_get_req(ctx); /* returns with 2 references to req */
req = aio_get_req(ctx, batch); /* returns with 2 references to req */
if (unlikely(!req)) {
fput(file);
return -EAGAIN;
@ -1621,8 +1695,9 @@ long do_io_submit(aio_context_t ctx_id, long nr,
{
struct kioctx *ctx;
long ret = 0;
int i;
int i = 0;
struct blk_plug plug;
struct kiocb_batch batch;
if (unlikely(nr < 0))
return -EINVAL;
@ -1639,6 +1714,8 @@ long do_io_submit(aio_context_t ctx_id, long nr,
return -EINVAL;
}
kiocb_batch_init(&batch, nr);
blk_start_plug(&plug);
/*
@ -1659,12 +1736,13 @@ long do_io_submit(aio_context_t ctx_id, long nr,
break;
}
ret = io_submit_one(ctx, user_iocb, &tmp, compat);
ret = io_submit_one(ctx, user_iocb, &tmp, &batch, compat);
if (ret)
break;
}
blk_finish_plug(&plug);
kiocb_batch_free(&batch);
put_ioctx(ctx);
return i ? i : ret;
}

11
fs/binfmt_elf.c
View file

@ -795,7 +795,16 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
* might try to exec. This is because the brk will
* follow the loader, and is not movable. */
#if defined(CONFIG_X86) || defined(CONFIG_ARM)
load_bias = 0;
/* Memory randomization might have been switched off
* in runtime via sysctl.
* If that is the case, retain the original non-zero
* load_bias value in order to establish proper
* non-randomized mappings.
*/
if (current->flags & PF_RANDOMIZE)
load_bias = 0;
else
load_bias = ELF_PAGESTART(ELF_ET_DYN_BASE - vaddr);
#else
load_bias = ELF_PAGESTART(ELF_ET_DYN_BASE - vaddr);
#endif

20
fs/hfs/btree.c
View file

@ -46,11 +46,26 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke
case HFS_EXT_CNID:
hfs_inode_read_fork(tree->inode, mdb->drXTExtRec, mdb->drXTFlSize,
mdb->drXTFlSize, be32_to_cpu(mdb->drXTClpSiz));
if (HFS_I(tree->inode)->alloc_blocks >
HFS_I(tree->inode)->first_blocks) {
printk(KERN_ERR "hfs: invalid btree extent records\n");
unlock_new_inode(tree->inode);
goto free_inode;
}
tree->inode->i_mapping->a_ops = &hfs_btree_aops;
break;
case HFS_CAT_CNID:
hfs_inode_read_fork(tree->inode, mdb->drCTExtRec, mdb->drCTFlSize,
mdb->drCTFlSize, be32_to_cpu(mdb->drCTClpSiz));
if (!HFS_I(tree->inode)->first_blocks) {
printk(KERN_ERR "hfs: invalid btree extent records "
"(0 size).\n");
unlock_new_inode(tree->inode);
goto free_inode;
}
tree->inode->i_mapping->a_ops = &hfs_btree_aops;
break;
default:
@ -59,11 +74,6 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke
}
unlock_new_inode(tree->inode);
if (!HFS_I(tree->inode)->first_blocks) {
printk(KERN_ERR "hfs: invalid btree extent records (0 size).\n");
goto free_inode;
}
mapping = tree->inode->i_mapping;
page = read_mapping_page(mapping, 0, NULL);
if (IS_ERR(page))

10
fs/isofs/inode.c
View file

@ -20,6 +20,7 @@
#include <linux/statfs.h>
#include <linux/cdrom.h>
#include <linux/parser.h>
#include <linux/mpage.h>
#include "isofs.h"
#include "zisofs.h"
@ -1148,7 +1149,13 @@ struct buffer_head *isofs_bread(struct inode *inode, sector_t block)
static int isofs_readpage(struct file *file, struct page *page)
{
return block_read_full_page(page,isofs_get_block);
return mpage_readpage(page, isofs_get_block);
}
static int isofs_readpages(struct file *file, struct address_space *mapping,
struct list_head *pages, unsigned nr_pages)
{
return mpage_readpages(mapping, pages, nr_pages, isofs_get_block);
}
static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
@ -1158,6 +1165,7 @@ static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
static const struct address_space_operations isofs_aops = {
.readpage = isofs_readpage,
.readpages = isofs_readpages,
.bmap = _isofs_bmap
};

142
fs/proc/base.c
View file

@ -1652,12 +1652,46 @@ static int proc_pid_readlink(struct dentry * dentry, char __user * buffer, int b
return error;
}
static int proc_pid_fd_link_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
struct inode *inode = dentry->d_inode;
struct task_struct *task = get_proc_task(inode);
int rc;
if (task == NULL)
return -ESRCH;
rc = -EACCES;
if (lock_trace(task))
goto out_task;
generic_fillattr(inode, stat);
unlock_trace(task);
rc = 0;
out_task:
put_task_struct(task);
return rc;
}
static const struct inode_operations proc_pid_link_inode_operations = {
.readlink = proc_pid_readlink,
.follow_link = proc_pid_follow_link,
.setattr = proc_setattr,
};
static const struct inode_operations proc_fdinfo_link_inode_operations = {
.setattr = proc_setattr,
.getattr = proc_pid_fd_link_getattr,
};
static const struct inode_operations proc_fd_link_inode_operations = {
.readlink = proc_pid_readlink,
.follow_link = proc_pid_follow_link,
.setattr = proc_setattr,
.getattr = proc_pid_fd_link_getattr,
};
/* building an inode */
@ -1889,49 +1923,61 @@ static unsigned name_to_int(struct dentry *dentry)
static int proc_fd_info(struct inode *inode, struct path *path, char *info)
{
struct task_struct *task = get_proc_task(inode);
struct files_struct *files = NULL;
struct task_struct *task;
struct files_struct *files;
struct file *file;
int fd = proc_fd(inode);
int rc;
if (task) {
files = get_files_struct(task);
put_task_struct(task);
}
if (files) {
/*
* We are not taking a ref to the file structure, so we must
* hold ->file_lock.
*/
spin_lock(&files->file_lock);
file = fcheck_files(files, fd);
if (file) {
unsigned int f_flags;
struct fdtable *fdt;
task = get_proc_task(inode);
if (!task)
return -ENOENT;
fdt = files_fdtable(files);
f_flags = file->f_flags & ~O_CLOEXEC;
if (FD_ISSET(fd, fdt->close_on_exec))
f_flags |= O_CLOEXEC;
rc = -EACCES;
if (lock_trace(task))
goto out_task;
if (path) {
*path = file->f_path;
path_get(&file->f_path);
}
if (info)
snprintf(info, PROC_FDINFO_MAX,
"pos:\t%lli\n"
"flags:\t0%o\n",
(long long) file->f_pos,
f_flags);
spin_unlock(&files->file_lock);
put_files_struct(files);
return 0;
rc = -ENOENT;
files = get_files_struct(task);
if (files == NULL)
goto out_unlock;
/*
* We are not taking a ref to the file structure, so we must
* hold ->file_lock.
*/
spin_lock(&files->file_lock);
file = fcheck_files(files, fd);
if (file) {
unsigned int f_flags;
struct fdtable *fdt;
fdt = files_fdtable(files);
f_flags = file->f_flags & ~O_CLOEXEC;
if (FD_ISSET(fd, fdt->close_on_exec))
f_flags |= O_CLOEXEC;
if (path) {
*path = file->f_path;
path_get(&file->f_path);
}
spin_unlock(&files->file_lock);
put_files_struct(files);
}
return -ENOENT;
if (info)
snprintf(info, PROC_FDINFO_MAX,
"pos:\t%lli\n"
"flags:\t0%o\n",
(long long) file->f_pos,
f_flags);
rc = 0;
} else
rc = -ENOENT;
spin_unlock(&files->file_lock);
put_files_struct(files);
out_unlock:
unlock_trace(task);
out_task:
put_task_struct(task);
return rc;
}
static int proc_fd_link(struct inode *inode, struct path *path)
@ -2026,7 +2072,7 @@ static struct dentry *proc_fd_instantiate(struct inode *dir,
spin_unlock(&files->file_lock);
put_files_struct(files);
inode->i_op = &proc_pid_link_inode_operations;
inode->i_op = &proc_fd_link_inode_operations;
inode->i_size = 64;
ei->op.proc_get_link = proc_fd_link;
d_set_d_op(dentry, &tid_fd_dentry_operations);
@ -2058,7 +2104,12 @@ static struct dentry *proc_lookupfd_common(struct inode *dir,
if (fd == ~0U)
goto out;
result = ERR_PTR(-EACCES);
if (lock_trace(task))
goto out;
result = instantiate(dir, dentry, task, &fd);
unlock_trace(task);
out:
put_task_struct(task);
out_no_task:
@ -2078,23 +2129,28 @@ static int proc_readfd_common(struct file * filp, void * dirent,
retval = -ENOENT;
if (!p)
goto out_no_task;
retval = -EACCES;
if (lock_trace(p))
goto out;
retval = 0;
fd = filp->f_pos;
switch (fd) {
case 0:
if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
goto out;
goto out_unlock;
filp->f_pos++;
case 1:
ino = parent_ino(dentry);
if (filldir(dirent, "..", 2, 1, ino, DT_DIR) < 0)
goto out;
goto out_unlock;
filp->f_pos++;
default:
files = get_files_struct(p);
if (!files)
goto out;
goto out_unlock;
rcu_read_lock();
for (fd = filp->f_pos-2;
fd < files_fdtable(files)->max_fds;
@ -2118,6 +2174,9 @@ static int proc_readfd_common(struct file * filp, void * dirent,
rcu_read_unlock();
put_files_struct(files);
}
out_unlock:
unlock_trace(p);
out:
put_task_struct(p);
out_no_task:
@ -2195,6 +2254,7 @@ static struct dentry *proc_fdinfo_instantiate(struct inode *dir,
ei->fd = fd;
inode->i_mode = S_IFREG | S_IRUSR;
inode->i_fop = &proc_fdinfo_file_operations;
inode->i_op = &proc_fdinfo_link_inode_operations;
d_set_d_op(dentry, &tid_fd_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */

46
fs/proc/proc_sysctl.c
View file

@ -3,6 +3,7 @@
*/
#include <linux/init.h>
#include <linux/sysctl.h>
#include <linux/poll.h>
#include <linux/proc_fs.h>
#include <linux/security.h>
#include <linux/namei.h>
@ -14,6 +15,15 @@ static const struct inode_operations proc_sys_inode_operations;
static const struct file_operations proc_sys_dir_file_operations;
static const struct inode_operations proc_sys_dir_operations;
void proc_sys_poll_notify(struct ctl_table_poll *poll)
{
if (!poll)
return;
atomic_inc(&poll->event);
wake_up_interruptible(&poll->wait);
}
static struct inode *proc_sys_make_inode(struct super_block *sb,
struct ctl_table_header *head, struct ctl_table *table)
{
@ -176,6 +186,39 @@ static ssize_t proc_sys_write(struct file *filp, const char __user *buf,
return proc_sys_call_handler(filp, (void __user *)buf, count, ppos, 1);
}
static int proc_sys_open(struct inode *inode, struct file *filp)
{
struct ctl_table *table = PROC_I(inode)->sysctl_entry;
if (table->poll)
filp->private_data = proc_sys_poll_event(table->poll);
return 0;
}
static unsigned int proc_sys_poll(struct file *filp, poll_table *wait)
{
struct inode *inode = filp->f_path.dentry->d_inode;
struct ctl_table *table = PROC_I(inode)->sysctl_entry;
unsigned long event = (unsigned long)filp->private_data;
unsigned int ret = DEFAULT_POLLMASK;
if (!table->proc_handler)
goto out;
if (!table->poll)
goto out;
poll_wait(filp, &table->poll->wait, wait);
if (event != atomic_read(&table->poll->event)) {
filp->private_data = proc_sys_poll_event(table->poll);
ret = POLLIN | POLLRDNORM | POLLERR | POLLPRI;
}
out:
return ret;
}
static int proc_sys_fill_cache(struct file *filp, void *dirent,
filldir_t filldir,
@ -364,12 +407,15 @@ static int proc_sys_getattr(struct vfsmount *mnt, struct dentry *dentry, struct
}
static const struct file_operations proc_sys_file_operations = {
.open = proc_sys_open,
.poll = proc_sys_poll,
.read = proc_sys_read,
.write = proc_sys_write,
.llseek = default_llseek,
};
static const struct file_operations proc_sys_dir_file_operations = {
.read = generic_read_dir,
.readdir = proc_sys_readdir,
.llseek = generic_file_llseek,
};

10
fs/ramfs/inode.c
View file

@ -23,7 +23,6 @@
* caches is sufficient.
*/
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/highmem.h>
@ -288,14 +287,7 @@ static int __init init_ramfs_fs(void)
{
return register_filesystem(&ramfs_fs_type);
}
static void __exit exit_ramfs_fs(void)
{
unregister_filesystem(&ramfs_fs_type);
}
module_init(init_ramfs_fs)
module_exit(exit_ramfs_fs)
int __init init_rootfs(void)
{
@ -311,5 +303,3 @@ int __init init_rootfs(void)
return err;
}
MODULE_LICENSE("GPL");

1
include/linux/aio.h
View file

@ -117,6 +117,7 @@ struct kiocb {
struct list_head ki_list; /* the aio core uses this
* for cancellation */
struct list_head ki_batch; /* batch allocation */
/*
* If the aio_resfd field of the userspace iocb is not zero,

2
include/linux/cgroup.h
View file

@ -516,7 +516,7 @@ struct cgroup_subsys {
struct list_head sibling;
/* used when use_id == true */
struct idr idr;
spinlock_t id_lock;
rwlock_t id_lock;
/* should be defined only by modular subsystems */
struct module *module;

10
include/linux/dma-mapping.h
View file

@ -1,6 +1,7 @@
#ifndef _LINUX_DMA_MAPPING_H
#define _LINUX_DMA_MAPPING_H
#include <linux/string.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/dma-attrs.h>
@ -117,6 +118,15 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
return -EIO;
}
static inline void *dma_zalloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
void *ret = dma_alloc_coherent(dev, size, dma_handle, flag);
if (ret)
memset(ret, 0, size);
return ret;
}
#ifdef CONFIG_HAS_DMA
static inline int dma_get_cache_alignment(void)
{

10
include/linux/magic.h
View file

@ -30,11 +30,11 @@
#define ANON_INODE_FS_MAGIC 0x09041934
#define PSTOREFS_MAGIC 0x6165676C
#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
#define MINIX3_SUPER_MAGIC 0x4d5a /* minix V3 fs */
#define MINIX_SUPER_MAGIC 0x137F /* minix v1 fs, 14 char names */
#define MINIX_SUPER_MAGIC2 0x138F /* minix v1 fs, 30 char names */
#define MINIX2_SUPER_MAGIC 0x2468 /* minix v2 fs, 14 char names */
#define MINIX2_SUPER_MAGIC2 0x2478 /* minix v2 fs, 30 char names */
#define MINIX3_SUPER_MAGIC 0x4d5a /* minix v3 fs, 60 char names */
#define MSDOS_SUPER_MAGIC 0x4d44 /* MD */
#define NCP_SUPER_MAGIC 0x564c /* Guess, what 0x564c is :-) */

44
include/linux/memcontrol.h
View file

@ -78,8 +78,8 @@ extern void mem_cgroup_uncharge_end(void);
extern void mem_cgroup_uncharge_page(struct page *page);
extern void mem_cgroup_uncharge_cache_page(struct page *page);
extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask);
int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg);
extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
@ -88,26 +88,28 @@ extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
static inline
int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
{
struct mem_cgroup *mem;
struct mem_cgroup *memcg;
rcu_read_lock();
mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner));
rcu_read_unlock();
return cgroup == mem;
return cgroup == memcg;
}
extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem);
extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
extern int
mem_cgroup_prepare_migration(struct page *page,
struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask);
extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
extern void mem_cgroup_end_migration(struct mem_cgroup *memcg,
struct page *oldpage, struct page *newpage, bool migration_ok);
/*
* For memory reclaim.
*/
int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg,
struct zone *zone);
int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg,
struct zone *zone);
int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
int nid, int zid, unsigned int lrumask);
@ -148,7 +150,7 @@ static inline void mem_cgroup_dec_page_stat(struct page *page,
unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
gfp_t gfp_mask,
unsigned long *total_scanned);
u64 mem_cgroup_get_limit(struct mem_cgroup *mem);
u64 mem_cgroup_get_limit(struct mem_cgroup *memcg);
void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
@ -244,18 +246,20 @@ static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm
return NULL;
}
static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
static inline int mm_match_cgroup(struct mm_struct *mm,
struct mem_cgroup *memcg)
{
return 1;
}
static inline int task_in_mem_cgroup(struct task_struct *task,
const struct mem_cgroup *mem)
const struct mem_cgroup *memcg)
{
return 1;
}
static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem)
static inline struct cgroup_subsys_state
*mem_cgroup_css(struct mem_cgroup *memcg)
{
return NULL;
}
@ -267,22 +271,22 @@ mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
return 0;
}
static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg,
struct page *oldpage, struct page *newpage, bool migration_ok)
{
}
static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *memcg)
{
return 0;
}
static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *memcg,
int priority)
{
}
static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *memcg,
int priority)
{
}
@ -293,13 +297,13 @@ static inline bool mem_cgroup_disabled(void)
}
static inline int
mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
{
return 1;
}
static inline int
mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone)
{
return 1;
}
@ -348,7 +352,7 @@ unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
}
static inline
u64 mem_cgroup_get_limit(struct mem_cgroup *mem)
u64 mem_cgroup_get_limit(struct mem_cgroup *memcg)
{
return 0;
}

69
include/linux/mm.h
View file

@ -356,36 +356,50 @@ static inline struct page *compound_head(struct page *page)
return page;
}
/*
* The atomic page->_mapcount, starts from -1: so that transitions
* both from it and to it can be tracked, using atomic_inc_and_test
* and atomic_add_negative(-1).
*/
static inline void reset_page_mapcount(struct page *page)
{
atomic_set(&(page)->_mapcount, -1);
}
static inline int page_mapcount(struct page *page)
{
return atomic_read(&(page)->_mapcount) + 1;
}
static inline int page_count(struct page *page)
{
return atomic_read(&compound_head(page)->_count);
}
static inline void get_page(struct page *page)
static inline void get_huge_page_tail(struct page *page)
{
/*
* Getting a normal page or the head of a compound page
* requires to already have an elevated page->_count. Only if
* we're getting a tail page, the elevated page->_count is
* required only in the head page, so for tail pages the
* bugcheck only verifies that the page->_count isn't
* negative.
* __split_huge_page_refcount() cannot run
* from under us.
*/
VM_BUG_ON(atomic_read(&page->_count) < !PageTail(page));
atomic_inc(&page->_count);
VM_BUG_ON(page_mapcount(page) < 0);
VM_BUG_ON(atomic_read(&page->_count) != 0);
atomic_inc(&page->_mapcount);
}
extern bool __get_page_tail(struct page *page);
static inline void get_page(struct page *page)
{
if (unlikely(PageTail(page)))
if (likely(__get_page_tail(page)))
return;
/*
* Getting a tail page will elevate both the head and tail
* page->_count(s).
* Getting a normal page or the head of a compound page
* requires to already have an elevated page->_count.
*/
if (unlikely(PageTail(page))) {
/*
* This is safe only because
* __split_huge_page_refcount can't run under
* get_page().
*/
VM_BUG_ON(atomic_read(&page->first_page->_count) <= 0);
atomic_inc(&page->first_page->_count);
}
VM_BUG_ON(atomic_read(&page->_count) <= 0);
atomic_inc(&page->_count);
}
static inline struct page *virt_to_head_page(const void *x)
@ -803,21 +817,6 @@ static inline pgoff_t page_index(struct page *page)
return page->index;
}
/*
* The atomic page->_mapcount, like _count, starts from -1:
* so that transitions both from it and to it can be tracked,
* using atomic_inc_and_test and atomic_add_negative(-1).
*/
static inline void reset_page_mapcount(struct page *page)
{
atomic_set(&(page)->_mapcount, -1);
}
static inline int page_mapcount(struct page *page)
{
return atomic_read(&(page)->_mapcount) + 1;
}
/*
* Return true if this page is mapped into pagetables.
*/

21
include/linux/mm_types.h
View file

@ -62,10 +62,23 @@ struct page {
struct {
union {
atomic_t _mapcount; /* Count of ptes mapped in mms,
* to show when page is mapped
* & limit reverse map searches.
*/
/*
* Count of ptes mapped in
* mms, to show when page is
* mapped & limit reverse map
* searches.
*
* Used also for tail pages
* refcounting instead of
* _count. Tail pages cannot
* be mapped and keeping the
* tail page _count zero at
* all times guarantees
* get_page_unless_zero() will
* never succeed on tail
* pages.
*/
atomic_t _mapcount;
struct {
unsigned inuse:16;

32
include/linux/pps-gpio.h Normal file
View file

@ -0,0 +1,32 @@
/*
* pps-gpio.h -- PPS client for GPIOs
*
*
* Copyright (C) 2011 James Nuss <jamesnuss@nanometrics.ca>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _PPS_GPIO_H
#define _PPS_GPIO_H
struct pps_gpio_platform_data {
bool assert_falling_edge;
bool capture_clear;
unsigned int gpio_pin;
const char *gpio_label;
};
#endif

1
include/linux/rio_ids.h
View file

@ -39,5 +39,6 @@
#define RIO_DID_IDTCPS1616 0x0379
#define RIO_DID_IDTVPS1616 0x0377
#define RIO_DID_IDTSPS1616 0x0378
#define RIO_DID_TSI721 0x80ab
#endif /* LINUX_RIO_IDS_H */

49
include/linux/sem.h
View file

@ -83,13 +83,6 @@ struct seminfo {
struct task_struct;
/* One semaphore structure for each semaphore in the system. */
struct sem {
int semval; /* current value */
int sempid; /* pid of last operation */
struct list_head sem_pending; /* pending single-sop operations */
};
/* One sem_array data structure for each set of semaphores in the system. */
struct sem_array {
struct kern_ipc_perm ____cacheline_aligned_in_smp
@ -103,51 +96,21 @@ struct sem_array {
int complex_count; /* pending complex operations */
};
/* One queue for each sleeping process in the system. */
struct sem_queue {
struct list_head simple_list; /* queue of pending operations */
struct list_head list; /* queue of pending operations */
struct task_struct *sleeper; /* this process */
struct sem_undo *undo; /* undo structure */
int pid; /* process id of requesting process */
int status; /* completion status of operation */
struct sembuf *sops; /* array of pending operations */
int nsops; /* number of operations */
int alter; /* does the operation alter the array? */
};
/* Each task has a list of undo requests. They are executed automatically
* when the process exits.
*/
struct sem_undo {
struct list_head list_proc; /* per-process list: all undos from one process. */
/* rcu protected */
struct rcu_head rcu; /* rcu struct for sem_undo() */
struct sem_undo_list *ulp; /* sem_undo_list for the process */
struct list_head list_id; /* per semaphore array list: all undos for one array */
int semid; /* semaphore set identifier */
short * semadj; /* array of adjustments, one per semaphore */
};
/* sem_undo_list controls shared access to the list of sem_undo structures
* that may be shared among all a CLONE_SYSVSEM task group.
*/
struct sem_undo_list {
atomic_t refcnt;
spinlock_t lock;
struct list_head list_proc;
};
#ifdef CONFIG_SYSVIPC
struct sysv_sem {
struct sem_undo_list *undo_list;
};
#ifdef CONFIG_SYSVIPC
extern int copy_semundo(unsigned long clone_flags, struct task_struct *tsk);
extern void exit_sem(struct task_struct *tsk);
#else
struct sysv_sem {
/* empty */
};
static inline int copy_semundo(unsigned long clone_flags, struct task_struct *tsk)
{
return 0;

22
include/linux/sysctl.h
View file

@ -931,6 +931,7 @@ enum
#ifdef __KERNEL__
#include <linux/list.h>
#include <linux/rcupdate.h>
#include <linux/wait.h>
/* For the /proc/sys support */
struct ctl_table;
@ -1011,6 +1012,26 @@ extern int proc_do_large_bitmap(struct ctl_table *, int,
* cover common cases.
*/
/* Support for userspace poll() to watch for changes */
struct ctl_table_poll {
atomic_t event;
wait_queue_head_t wait;
};
static inline void *proc_sys_poll_event(struct ctl_table_poll *poll)
{
return (void *)(unsigned long)atomic_read(&poll->event);
}
void proc_sys_poll_notify(struct ctl_table_poll *poll);
#define __CTL_TABLE_POLL_INITIALIZER(name) { \
.event = ATOMIC_INIT(0), \
.wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait) }
#define DEFINE_CTL_TABLE_POLL(name) \
struct ctl_table_poll name = __CTL_TABLE_POLL_INITIALIZER(name)
/* A sysctl table is an array of struct ctl_table: */
struct ctl_table
{
@ -1021,6 +1042,7 @@ struct ctl_table
struct ctl_table *child;
struct ctl_table *parent; /* Automatically set */
proc_handler *proc_handler; /* Callback for text formatting */
struct ctl_table_poll *poll;
void *extra1;
void *extra2;
};

16
include/linux/utsname.h
View file

@ -37,6 +37,14 @@ struct new_utsname {
#include <linux/nsproxy.h>
#include <linux/err.h>
enum uts_proc {
UTS_PROC_OSTYPE,
UTS_PROC_OSRELEASE,
UTS_PROC_VERSION,
UTS_PROC_HOSTNAME,
UTS_PROC_DOMAINNAME,
};
struct user_namespace;
extern struct user_namespace init_user_ns;
@ -80,6 +88,14 @@ static inline struct uts_namespace *copy_utsname(unsigned long flags,
}
#endif
#ifdef CONFIG_PROC_SYSCTL
extern void uts_proc_notify(enum uts_proc proc);
#else
static inline void uts_proc_notify(enum uts_proc proc)
{
}
#endif
static inline struct new_utsname *utsname(void)
{
return &current->nsproxy->uts_ns->name;

4
init/Kconfig
View file

@ -947,7 +947,7 @@ config UID16
config SYSCTL_SYSCALL
bool "Sysctl syscall support" if EXPERT
depends on PROC_SYSCTL
default y
default n
select SYSCTL
---help---
sys_sysctl uses binary paths that have been found challenging
@ -959,7 +959,7 @@ config SYSCTL_SYSCALL
trying to save some space it is probably safe to disable this,
making your kernel marginally smaller.
If unsure say Y here.
If unsure say N here.
config KALLSYMS
bool "Load all symbols for debugging/ksymoops" if EXPERT

48
init/do_mounts.c
View file

@ -28,7 +28,7 @@ int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */
int root_mountflags = MS_RDONLY | MS_SILENT;
static char * __initdata root_device_name;
static char __initdata saved_root_name[64];
static int __initdata root_wait;
static int root_wait;
dev_t ROOT_DEV;
@ -85,12 +85,15 @@ static int match_dev_by_uuid(struct device *dev, void *data)
/**
* devt_from_partuuid - looks up the dev_t of a partition by its UUID
* @uuid: 36 byte char array containing a hex ascii UUID
* @uuid: min 36 byte char array containing a hex ascii UUID
*
* The function will return the first partition which contains a matching
* UUID value in its partition_meta_info struct. This does not search
* by filesystem UUIDs.
*
* If @uuid is followed by a "/PARTNROFF=%d", then the number will be
* extracted and used as an offset from the partition identified by the UUID.
*
* Returns the matching dev_t on success or 0 on failure.
*/
static dev_t devt_from_partuuid(char *uuid_str)
@ -98,6 +101,28 @@ static dev_t devt_from_partuuid(char *uuid_str)
dev_t res = 0;
struct device *dev = NULL;
u8 uuid[16];
struct gendisk *disk;
struct hd_struct *part;
int offset = 0;
if (strlen(uuid_str) < 36)
goto done;
/* Check for optional partition number offset attributes. */
if (uuid_str[36]) {
char c = 0;
/* Explicitly fail on poor PARTUUID syntax. */
if (sscanf(&uuid_str[36],
"/PARTNROFF=%d%c", &offset, &c) != 1) {
printk(KERN_ERR "VFS: PARTUUID= is invalid.\n"
"Expected PARTUUID=<valid-uuid-id>[/PARTNROFF=%%d]\n");
if (root_wait)
printk(KERN_ERR
"Disabling rootwait; root= is invalid.\n");
root_wait = 0;
goto done;
}
}
/* Pack the requested UUID in the expected format. */
part_pack_uuid(uuid_str, uuid);
@ -107,8 +132,21 @@ static dev_t devt_from_partuuid(char *uuid_str)
goto done;
res = dev->devt;
put_device(dev);
/* Attempt to find the partition by offset. */
if (!offset)
goto no_offset;
res = 0;
disk = part_to_disk(dev_to_part(dev));
part = disk_get_part(disk, dev_to_part(dev)->partno + offset);
if (part) {
res = part_devt(part);
put_device(part_to_dev(part));
}
no_offset:
put_device(dev);
done:
return res;
}
@ -126,6 +164,8 @@ static dev_t devt_from_partuuid(char *uuid_str)
* used when disk name of partitioned disk ends on a digit.
* 6) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing the
* unique id of a partition if the partition table provides it.
* 7) PARTUUID=<UUID>/PARTNROFF=<int> to select a partition in relation to
* a partition with a known unique id.
*
* If name doesn't have fall into the categories above, we return (0,0).
* block_class is used to check if something is a disk name. If the disk
@ -143,8 +183,6 @@ dev_t name_to_dev_t(char *name)
#ifdef CONFIG_BLOCK
if (strncmp(name, "PARTUUID=", 9) == 0) {
name += 9;
if (strlen(name) != 36)
goto fail;
res = devt_from_partuuid(name);
if (!res)
goto fail;

14
init/do_mounts_rd.c
View file

@ -119,6 +119,20 @@ identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
goto done;
}
/*
* Read 512 bytes further to check if cramfs is padded
*/
sys_lseek(fd, start_block * BLOCK_SIZE + 0x200, 0);
sys_read(fd, buf, size);
if (cramfsb->magic == CRAMFS_MAGIC) {
printk(KERN_NOTICE
"RAMDISK: cramfs filesystem found at block %d\n",
start_block);
nblocks = (cramfsb->size + BLOCK_SIZE - 1) >> BLOCK_SIZE_BITS;
goto done;
}
/*
* Read block 1 to test for minix and ext2 superblock
*/

56
ipc/sem.c
View file

@ -90,6 +90,52 @@
#include <asm/uaccess.h>
#include "util.h"
/* One semaphore structure for each semaphore in the system. */
struct sem {
int semval; /* current value */
int sempid; /* pid of last operation */
struct list_head sem_pending; /* pending single-sop operations */
};
/* One queue for each sleeping process in the system. */
struct sem_queue {
struct list_head simple_list; /* queue of pending operations */
struct list_head list; /* queue of pending operations */
struct task_struct *sleeper; /* this process */
struct sem_undo *undo; /* undo structure */
int pid; /* process id of requesting process */
int status; /* completion status of operation */
struct sembuf *sops; /* array of pending operations */
int nsops; /* number of operations */
int alter; /* does *sops alter the array? */
};
/* Each task has a list of undo requests. They are executed automatically
* when the process exits.
*/
struct sem_undo {
struct list_head list_proc; /* per-process list: *
* all undos from one process
* rcu protected */
struct rcu_head rcu; /* rcu struct for sem_undo */
struct sem_undo_list *ulp; /* back ptr to sem_undo_list */
struct list_head list_id; /* per semaphore array list:
* all undos for one array */
int semid; /* semaphore set identifier */
short *semadj; /* array of adjustments */
/* one per semaphore */
};
/* sem_undo_list controls shared access to the list of sem_undo structures
* that may be shared among all a CLONE_SYSVSEM task group.
*/
struct sem_undo_list {
atomic_t refcnt;
spinlock_t lock;
struct list_head list_proc;
};
#define sem_ids(ns) ((ns)->ids[IPC_SEM_IDS])
#define sem_unlock(sma) ipc_unlock(&(sma)->sem_perm)
@ -1426,6 +1472,8 @@ SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
queue.status = -EINTR;
queue.sleeper = current;
sleep_again:
current->state = TASK_INTERRUPTIBLE;
sem_unlock(sma);
@ -1460,7 +1508,6 @@ SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
* Array removed? If yes, leave without sem_unlock().
*/
if (IS_ERR(sma)) {
error = -EIDRM;
goto out_free;
}
@ -1479,6 +1526,13 @@ SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
*/
if (timeout && jiffies_left == 0)
error = -EAGAIN;
/*
* If the wakeup was spurious, just retry
*/
if (error == -EINTR && !signal_pending(current))
goto sleep_again;
unlink_queue(sma, &queue);
out_unlock_free:

39
kernel/cgroup.c
View file

@ -2027,7 +2027,7 @@ int cgroup_attach_proc(struct cgroup *cgrp, struct task_struct *leader)
goto out_free_group_list;
/* prevent changes to the threadgroup list while we take a snapshot. */
rcu_read_lock();
read_lock(&tasklist_lock);
if (!thread_group_leader(leader)) {
/*
* a race with de_thread from another thread's exec() may strip
@ -2036,7 +2036,7 @@ int cgroup_attach_proc(struct cgroup *cgrp, struct task_struct *leader)
* throw this task away and try again (from cgroup_procs_write);
* this is "double-double-toil-and-trouble-check locking".
*/
rcu_read_unlock();
read_unlock(&tasklist_lock);
retval = -EAGAIN;
goto out_free_group_list;
}
@ -2057,7 +2057,7 @@ int cgroup_attach_proc(struct cgroup *cgrp, struct task_struct *leader)
} while_each_thread(leader, tsk);
/* remember the number of threads in the array for later. */
group_size = i;
rcu_read_unlock();
read_unlock(&tasklist_lock);
/*
* step 1: check that we can legitimately attach to the cgroup.
@ -2135,14 +2135,17 @@ int cgroup_attach_proc(struct cgroup *cgrp, struct task_struct *leader)
oldcgrp = task_cgroup_from_root(tsk, root);
if (cgrp == oldcgrp)
continue;
/* attach each task to each subsystem */
for_each_subsys(root, ss) {
if (ss->attach_task)
ss->attach_task(cgrp, tsk);
}
/* if the thread is PF_EXITING, it can just get skipped. */
retval = cgroup_task_migrate(cgrp, oldcgrp, tsk, true);
BUG_ON(retval != 0 && retval != -ESRCH);
if (retval == 0) {
/* attach each task to each subsystem */
for_each_subsys(root, ss) {
if (ss->attach_task)
ss->attach_task(cgrp, tsk);
}
} else {
BUG_ON(retval != -ESRCH);
}
}
/* nothing is sensitive to fork() after this point. */
@ -4880,9 +4883,9 @@ void free_css_id(struct cgroup_subsys *ss, struct cgroup_subsys_state *css)
rcu_assign_pointer(id->css, NULL);
rcu_assign_pointer(css->id, NULL);
spin_lock(&ss->id_lock);
write_lock(&ss->id_lock);
idr_remove(&ss->idr, id->id);
spin_unlock(&ss->id_lock);
write_unlock(&ss->id_lock);
kfree_rcu(id, rcu_head);
}
EXPORT_SYMBOL_GPL(free_css_id);
@ -4908,10 +4911,10 @@ static struct css_id *get_new_cssid(struct cgroup_subsys *ss, int depth)
error = -ENOMEM;
goto err_out;
}
spin_lock(&ss->id_lock);
write_lock(&ss->id_lock);
/* Don't use 0. allocates an ID of 1-65535 */
error = idr_get_new_above(&ss->idr, newid, 1, &myid);
spin_unlock(&ss->id_lock);
write_unlock(&ss->id_lock);
/* Returns error when there are no free spaces for new ID.*/
if (error) {
@ -4926,9 +4929,9 @@ static struct css_id *get_new_cssid(struct cgroup_subsys *ss, int depth)
return newid;
remove_idr:
error = -ENOSPC;
spin_lock(&ss->id_lock);
write_lock(&ss->id_lock);
idr_remove(&ss->idr, myid);
spin_unlock(&ss->id_lock);
write_unlock(&ss->id_lock);
err_out:
kfree(newid);
return ERR_PTR(error);
@ -4940,7 +4943,7 @@ static int __init_or_module cgroup_init_idr(struct cgroup_subsys *ss,
{
struct css_id *newid;
spin_lock_init(&ss->id_lock);
rwlock_init(&ss->id_lock);
idr_init(&ss->idr);
newid = get_new_cssid(ss, 0);
@ -5035,9 +5038,9 @@ css_get_next(struct cgroup_subsys *ss, int id,
* scan next entry from bitmap(tree), tmpid is updated after
* idr_get_next().
*/
spin_lock(&ss->id_lock);
read_lock(&ss->id_lock);
tmp = idr_get_next(&ss->idr, &tmpid);
spin_unlock(&ss->id_lock);
read_unlock(&ss->id_lock);
if (!tmp)
break;

9
kernel/cpuset.c
View file

@ -949,6 +949,8 @@ static void cpuset_migrate_mm(struct mm_struct *mm, const nodemask_t *from,
static void cpuset_change_task_nodemask(struct task_struct *tsk,
nodemask_t *newmems)
{
bool masks_disjoint = !nodes_intersects(*newmems, tsk->mems_allowed);
repeat:
/*
* Allow tasks that have access to memory reserves because they have
@ -963,7 +965,6 @@ static void cpuset_change_task_nodemask(struct task_struct *tsk,
nodes_or(tsk->mems_allowed, tsk->mems_allowed, *newmems);
mpol_rebind_task(tsk, newmems, MPOL_REBIND_STEP1);
/*
* ensure checking ->mems_allowed_change_disable after setting all new
* allowed nodes.
@ -980,9 +981,11 @@ static void cpuset_change_task_nodemask(struct task_struct *tsk,
/*
* Allocation of memory is very fast, we needn't sleep when waiting
* for the read-side.
* for the read-side. No wait is necessary, however, if at least one
* node remains unchanged.
*/
while (ACCESS_ONCE(tsk->mems_allowed_change_disable)) {
while (masks_disjoint &&
ACCESS_ONCE(tsk->mems_allowed_change_disable)) {
task_unlock(tsk);
if (!task_curr(tsk))
yield();

2
kernel/sys.c
View file

@ -1286,6 +1286,7 @@ SYSCALL_DEFINE2(sethostname, char __user *, name, int, len)
memset(u->nodename + len, 0, sizeof(u->nodename) - len);
errno = 0;
}
uts_proc_notify(UTS_PROC_HOSTNAME);
up_write(&uts_sem);
return errno;
}
@ -1336,6 +1337,7 @@ SYSCALL_DEFINE2(setdomainname, char __user *, name, int, len)
memset(u->domainname + len, 0, sizeof(u->domainname) - len);
errno = 0;
}
uts_proc_notify(UTS_PROC_DOMAINNAME);
up_write(&uts_sem);
return errno;
}

23
kernel/utsname_sysctl.c
View file

@ -13,6 +13,7 @@
#include <linux/uts.h>
#include <linux/utsname.h>
#include <linux/sysctl.h>
#include <linux/wait.h>
static void *get_uts(ctl_table *table, int write)
{
@ -51,12 +52,19 @@ static int proc_do_uts_string(ctl_table *table, int write,
uts_table.data = get_uts(table, write);
r = proc_dostring(&uts_table,write,buffer,lenp, ppos);
put_uts(table, write, uts_table.data);
if (write)
proc_sys_poll_notify(table->poll);
return r;
}
#else
#define proc_do_uts_string NULL
#endif
static DEFINE_CTL_TABLE_POLL(hostname_poll);
static DEFINE_CTL_TABLE_POLL(domainname_poll);
static struct ctl_table uts_kern_table[] = {
{
.procname = "ostype",
@ -85,6 +93,7 @@ static struct ctl_table uts_kern_table[] = {
.maxlen = sizeof(init_uts_ns.name.nodename),
.mode = 0644,
.proc_handler = proc_do_uts_string,
.poll = &hostname_poll,
},
{
.procname = "domainname",
@ -92,6 +101,7 @@ static struct ctl_table uts_kern_table[] = {
.maxlen = sizeof(init_uts_ns.name.domainname),
.mode = 0644,
.proc_handler = proc_do_uts_string,
.poll = &domainname_poll,
},
{}
};
@ -105,6 +115,19 @@ static struct ctl_table uts_root_table[] = {
{}
};
#ifdef CONFIG_PROC_SYSCTL
/*
* Notify userspace about a change in a certain entry of uts_kern_table,
* identified by the parameter proc.
*/
void uts_proc_notify(enum uts_proc proc)
{
struct ctl_table *table = &uts_kern_table[proc];
proc_sys_poll_notify(table->poll);
}
#endif
static int __init utsname_sysctl_init(void)
{
register_sysctl_table(uts_root_table);

11
lib/idr.c
View file

@ -944,6 +944,7 @@ int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end,
{
int ret, id;
unsigned int max;
unsigned long flags;
BUG_ON((int)start < 0);
BUG_ON((int)end < 0);
@ -959,7 +960,7 @@ int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end,
if (!ida_pre_get(ida, gfp_mask))
return -ENOMEM;
spin_lock(&simple_ida_lock);
spin_lock_irqsave(&simple_ida_lock, flags);
ret = ida_get_new_above(ida, start, &id);
if (!ret) {
if (id > max) {
@ -969,7 +970,7 @@ int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end,
ret = id;
}
}
spin_unlock(&simple_ida_lock);
spin_unlock_irqrestore(&simple_ida_lock, flags);
if (unlikely(ret == -EAGAIN))
goto again;
@ -985,10 +986,12 @@ EXPORT_SYMBOL(ida_simple_get);
*/
void ida_simple_remove(struct ida *ida, unsigned int id)
{
unsigned long flags;
BUG_ON((int)id < 0);
spin_lock(&simple_ida_lock);
spin_lock_irqsave(&simple_ida_lock, flags);
ida_remove(ida, id);
spin_unlock(&simple_ida_lock);
spin_unlock_irqrestore(&simple_ida_lock, flags);
}
EXPORT_SYMBOL(ida_simple_remove);

37
mm/huge_memory.c
View file

@ -990,7 +990,7 @@ struct page *follow_trans_huge_pmd(struct mm_struct *mm,
page += (addr & ~HPAGE_PMD_MASK) >> PAGE_SHIFT;
VM_BUG_ON(!PageCompound(page));
if (flags & FOLL_GET)
get_page(page);
get_page_foll(page);
out:
return page;
@ -1202,6 +1202,7 @@ static void __split_huge_page_refcount(struct page *page)
unsigned long head_index = page->index;
struct zone *zone = page_zone(page);
int zonestat;
int tail_count = 0;
/* prevent PageLRU to go away from under us, and freeze lru stats */
spin_lock_irq(&zone->lru_lock);
@ -1210,11 +1211,27 @@ static void __split_huge_page_refcount(struct page *page)
for (i = 1; i < HPAGE_PMD_NR; i++) {
struct page *page_tail = page + i;
/* tail_page->_count cannot change */
atomic_sub(atomic_read(&page_tail->_count), &page->_count);
BUG_ON(page_count(page) <= 0);
atomic_add(page_mapcount(page) + 1, &page_tail->_count);
BUG_ON(atomic_read(&page_tail->_count) <= 0);
/* tail_page->_mapcount cannot change */
BUG_ON(page_mapcount(page_tail) < 0);
tail_count += page_mapcount(page_tail);
/* check for overflow */
BUG_ON(tail_count < 0);
BUG_ON(atomic_read(&page_tail->_count) != 0);
/*
* tail_page->_count is zero and not changing from
* under us. But get_page_unless_zero() may be running
* from under us on the tail_page. If we used
* atomic_set() below instead of atomic_add(), we
* would then run atomic_set() concurrently with
* get_page_unless_zero(), and atomic_set() is
* implemented in C not using locked ops. spin_unlock
* on x86 sometime uses locked ops because of PPro
* errata 66, 92, so unless somebody can guarantee
* atomic_set() here would be safe on all archs (and
* not only on x86), it's safer to use atomic_add().
*/
atomic_add(page_mapcount(page) + page_mapcount(page_tail) + 1,
&page_tail->_count);
/* after clearing PageTail the gup refcount can be released */
smp_mb();
@ -1232,10 +1249,7 @@ static void __split_huge_page_refcount(struct page *page)
(1L << PG_uptodate)));
page_tail->flags |= (1L << PG_dirty);
/*
* 1) clear PageTail before overwriting first_page
* 2) clear PageTail before clearing PageHead for VM_BUG_ON
*/
/* clear PageTail before overwriting first_page */
smp_wmb();
/*
@ -1252,7 +1266,6 @@ static void __split_huge_page_refcount(struct page *page)
* status is achieved setting a reserved bit in the
* pmd, not by clearing the present bit.
*/
BUG_ON(page_mapcount(page_tail));
page_tail->_mapcount = page->_mapcount;
BUG_ON(page_tail->mapping);
@ -1269,6 +1282,8 @@ static void __split_huge_page_refcount(struct page *page)
lru_add_page_tail(zone, page, page_tail);
}
atomic_sub(tail_count, &page->_count);
BUG_ON(atomic_read(&page->_count) <= 0);
__dec_zone_page_state(page, NR_ANON_TRANSPARENT_HUGEPAGES);
__mod_zone_page_state(zone, NR_ANON_PAGES, HPAGE_PMD_NR);

46
mm/internal.h
View file

@ -37,6 +37,52 @@ static inline void __put_page(struct page *page)
atomic_dec(&page->_count);
}
static inline void __get_page_tail_foll(struct page *page,
bool get_page_head)
{
/*
* If we're getting a tail page, the elevated page->_count is
* required only in the head page and we will elevate the head
* page->_count and tail page->_mapcount.
*
* We elevate page_tail->_mapcount for tail pages to force
* page_tail->_count to be zero at all times to avoid getting
* false positives from get_page_unless_zero() with
* speculative page access (like in
* page_cache_get_speculative()) on tail pages.
*/
VM_BUG_ON(atomic_read(&page->first_page->_count) <= 0);
VM_BUG_ON(atomic_read(&page->_count) != 0);
VM_BUG_ON(page_mapcount(page) < 0);
if (get_page_head)
atomic_inc(&page->first_page->_count);
atomic_inc(&page->_mapcount);
}
/*
* This is meant to be called as the FOLL_GET operation of
* follow_page() and it must be called while holding the proper PT
* lock while the pte (or pmd_trans_huge) is still mapping the page.
*/
static inline void get_page_foll(struct page *page)
{
if (unlikely(PageTail(page)))
/*
* This is safe only because
* __split_huge_page_refcount() can't run under
* get_page_foll() because we hold the proper PT lock.
*/
__get_page_tail_foll(page, true);
else {
/*
* Getting a normal page or the head of a compound page
* requires to already have an elevated page->_count.
*/
VM_BUG_ON(atomic_read(&page->_count) <= 0);
atomic_inc(&page->_count);
}
}
extern unsigned long highest_memmap_pfn;
/*

1008
mm/memcontrol.c
View file

File diff suppressed because it is too large Load diff

2
mm/memory.c
View file

@ -1503,7 +1503,7 @@ struct page *follow_page(struct vm_area_struct *vma, unsigned long address,
}
if (flags & FOLL_GET)
get_page(page);
get_page_foll(page);
if (flags & FOLL_TOUCH) {
if ((flags & FOLL_WRITE) &&
!pte_dirty(pte) && !PageDirty(page))

9
mm/page_cgroup.c
View file

@ -133,10 +133,13 @@ struct page *lookup_cgroup_page(struct page_cgroup *pc)
static void *__meminit alloc_page_cgroup(size_t size, int nid)
{
void *addr = NULL;
gfp_t flags = GFP_KERNEL | __GFP_NOWARN;
addr = alloc_pages_exact_nid(nid, size, GFP_KERNEL | __GFP_NOWARN);
if (addr)
addr = alloc_pages_exact_nid(nid, size, flags);
if (addr) {
kmemleak_alloc(addr, size, 1, flags);
return addr;
}
if (node_state(nid, N_HIGH_MEMORY))
addr = vmalloc_node(size, nid);
@ -357,7 +360,7 @@ struct swap_cgroup_ctrl {
spinlock_t lock;
};
struct swap_cgroup_ctrl swap_cgroup_ctrl[MAX_SWAPFILES];
static struct swap_cgroup_ctrl swap_cgroup_ctrl[MAX_SWAPFILES];
struct swap_cgroup {
unsigned short id;

83
mm/swap.c
View file

@ -78,39 +78,22 @@ static void put_compound_page(struct page *page)
{
if (unlikely(PageTail(page))) {
/* __split_huge_page_refcount can run under us */
struct page *page_head = page->first_page;
smp_rmb();
/*
* If PageTail is still set after smp_rmb() we can be sure
* that the page->first_page we read wasn't a dangling pointer.
* See __split_huge_page_refcount() smp_wmb().
*/
if (likely(PageTail(page) && get_page_unless_zero(page_head))) {
struct page *page_head = compound_trans_head(page);
if (likely(page != page_head &&
get_page_unless_zero(page_head))) {
unsigned long flags;
/*
* Verify that our page_head wasn't converted
* to a a regular page before we got a
* reference on it.
* page_head wasn't a dangling pointer but it
* may not be a head page anymore by the time
* we obtain the lock. That is ok as long as it
* can't be freed from under us.
*/
if (unlikely(!PageHead(page_head))) {
/* PageHead is cleared after PageTail */
smp_rmb();
VM_BUG_ON(PageTail(page));
goto out_put_head;
}
/*
* Only run compound_lock on a valid PageHead,
* after having it pinned with
* get_page_unless_zero() above.
*/
smp_mb();
/* page_head wasn't a dangling pointer */
flags = compound_lock_irqsave(page_head);
if (unlikely(!PageTail(page))) {
/* __split_huge_page_refcount run before us */
compound_unlock_irqrestore(page_head, flags);
VM_BUG_ON(PageHead(page_head));
out_put_head:
if (put_page_testzero(page_head))
__put_single_page(page_head);
out_put_single:
@ -121,16 +104,17 @@ static void put_compound_page(struct page *page)
VM_BUG_ON(page_head != page->first_page);
/*
* We can release the refcount taken by
* get_page_unless_zero now that
* split_huge_page_refcount is blocked on the
* compound_lock.
* get_page_unless_zero() now that
* __split_huge_page_refcount() is blocked on
* the compound_lock.
*/
if (put_page_testzero(page_head))
VM_BUG_ON(1);
/* __split_huge_page_refcount will wait now */
VM_BUG_ON(atomic_read(&page->_count) <= 0);
atomic_dec(&page->_count);
VM_BUG_ON(page_mapcount(page) <= 0);
atomic_dec(&page->_mapcount);
VM_BUG_ON(atomic_read(&page_head->_count) <= 0);
VM_BUG_ON(atomic_read(&page->_count) != 0);
compound_unlock_irqrestore(page_head, flags);
if (put_page_testzero(page_head)) {
if (PageHead(page_head))
@ -160,6 +144,45 @@ void put_page(struct page *page)
}
EXPORT_SYMBOL(put_page);
/*
* This function is exported but must not be called by anything other
* than get_page(). It implements the slow path of get_page().
*/
bool __get_page_tail(struct page *page)
{
/*
* This takes care of get_page() if run on a tail page
* returned by one of the get_user_pages/follow_page variants.
* get_user_pages/follow_page itself doesn't need the compound
* lock because it runs __get_page_tail_foll() under the
* proper PT lock that already serializes against
* split_huge_page().
*/
unsigned long flags;
bool got = false;
struct page *page_head = compound_trans_head(page);
if (likely(page != page_head && get_page_unless_zero(page_head))) {
/*
* page_head wasn't a dangling pointer but it
* may not be a head page anymore by the time
* we obtain the lock. That is ok as long as it
* can't be freed from under us.
*/
flags = compound_lock_irqsave(page_head);
/* here __split_huge_page_refcount won't run anymore */
if (likely(PageTail(page))) {
__get_page_tail_foll(page, false);
got = true;
}
compound_unlock_irqrestore(page_head, flags);
if (unlikely(!got))
put_page(page_head);
}
return got;
}
EXPORT_SYMBOL(__get_page_tail);
/**
* put_pages_list() - release a list of pages
* @pages: list of pages threaded on page->lru

4
mm/vmscan.c
View file

@ -1767,7 +1767,7 @@ static int inactive_anon_is_low(struct zone *zone, struct scan_control *sc)
if (scanning_global_lru(sc))
low = inactive_anon_is_low_global(zone);
else
low = mem_cgroup_inactive_anon_is_low(sc->mem_cgroup);
low = mem_cgroup_inactive_anon_is_low(sc->mem_cgroup, zone);
return low;
}
#else
@ -1810,7 +1810,7 @@ static int inactive_file_is_low(struct zone *zone, struct scan_control *sc)
if (scanning_global_lru(sc))
low = inactive_file_is_low_global(zone);
else
low = mem_cgroup_inactive_file_is_low(sc->mem_cgroup);
low = mem_cgroup_inactive_file_is_low(sc->mem_cgroup, zone);
return low;
}