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pktcdvd: improve BKL and compat_ioctl.c usage

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The pktcdvd driver uses proper locking and does not need the BKL in the
ioctl and llseek functions of the character device, so kill both.

Moving the compat_ioctl handling from common code into the driver itself
fixes build problems when CONFIG_BLOCK is disabled.

Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arnd Bergmann 2010-04-28 14:36:41 +02:00 committed by Linus Torvalds
parent a36fed12a4
commit f80a0ca6ad
2 changed files with 14 additions and 6 deletions
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17
drivers/block/pktcdvd.c
View file

@ -48,6 +48,7 @@
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/compat.h>
#include <linux/kthread.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
@ -2984,7 +2985,7 @@ static void pkt_get_status(struct pkt_ctrl_command *ctrl_cmd)
mutex_unlock(&ctl_mutex);
}
static int pkt_ctl_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
static long pkt_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
struct pkt_ctrl_command ctrl_cmd;
@ -3021,10 +3022,20 @@ static int pkt_ctl_ioctl(struct inode *inode, struct file *file, unsigned int cm
return ret;
}
#ifdef CONFIG_COMPAT
static long pkt_ctl_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
return pkt_ctl_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
}
#endif
static const struct file_operations pkt_ctl_fops = {
.ioctl = pkt_ctl_ioctl,
.owner = THIS_MODULE,
.open = nonseekable_open,
.unlocked_ioctl = pkt_ctl_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = pkt_ctl_compat_ioctl,
#endif
.owner = THIS_MODULE,
};
static struct miscdevice pkt_misc = {

3
fs/compat_ioctl.c
View file

@ -102,7 +102,6 @@
#include <linux/nbd.h>
#include <linux/random.h>
#include <linux/filter.h>
#include <linux/pktcdvd.h>
#include <linux/hiddev.h>
@ -1126,8 +1125,6 @@ COMPATIBLE_IOCTL(PPGETMODE)
COMPATIBLE_IOCTL(PPGETPHASE)
COMPATIBLE_IOCTL(PPGETFLAGS)
COMPATIBLE_IOCTL(PPSETFLAGS)
/* pktcdvd */
COMPATIBLE_IOCTL(PACKET_CTRL_CMD)
/* Big A */
/* sparc only */
/* Big Q for sound/OSS */