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Paul Mundt d02d6be5d5 sh: fix miscompilation of ip_fast_csum with gcc >= 4.3 
As noted by Matthew Wilcox:

    Kyle McMartin just tracked down a bug on parisc to a missing
    "memory" clobber in the inline assembly implementation of
    ip_fast_csum.  The FRV, SH and Xtensa ports are also missing a
    memory clobber, so I thought it would be polite to let you know.

    The bug manifests as dropped network packets (obviously they have
    the wrong checksum).  It started appearing for parisc with GCC 4.3.

    The GCC manual says:

     If your assembler instructions access memory in an unpredictable
     fashion, add `memory' to the list of clobbered registers.  This
     will cause GCC to not keep memory values cached in registers
     across the assembler instruction and not optimize stores or loads
     to that memory.

    I see that FRV has a 400 byte memory output which may prevent this
    problem from appearing, but SH and Xtensa have nothing to prevent
    this bug.  Hope this saves you a few days of debugging.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-06-02 12:40:14 +09:00
..
cpu-sh2 rtc: rtc-sh: Split out the CPU defs to asm/cpu/. 2008-01-28 13:18:58 +09:00
cpu-sh2a rtc: rtc-sh: Split out the CPU defs to asm/cpu/. 2008-01-28 13:18:58 +09:00
cpu-sh3 sh: Fix DMAC base address for SH7709S 2008-05-09 19:04:12 +09:00
cpu-sh4 sh: Add support for SH7723 CPU subtype. 2008-04-18 09:50:07 -07:00
cpu-sh5 sh: Kill off more dead symbols. 2008-02-14 14:22:12 +09:00
dreamcast sh: Add maple bus support for the SEGA Dreamcast. 2007-09-21 15:55:55 +09:00
hd64465
landisk
sh03 sh: intc - remove redundant irq code for sh03, snapgear and titan 2007-09-21 11:57:47 +09:00
.gitignore
a.out.h aout: move STACK_TOP[_MAX] to asm/processor.h 2008-02-08 09:22:29 -08:00
adc.h
addrspace.h sh: Clean up places that make 29-bit physical assumptions. 2008-01-28 13:18:59 +09:00
atomic-grb.h sh: GUSA atomic rollback support. 2008-01-28 13:18:58 +09:00
atomic-irq.h
atomic-llsc.h
atomic.h sh: GUSA atomic rollback support. 2008-01-28 13:18:58 +09:00
auxvec.h sh: Provide the FPSCR init through AT_FPUCW. 2008-01-28 13:19:00 +09:00
bitops-grb.h sh: GUSA atomic rollback support. 2008-01-28 13:18:58 +09:00
bitops-irq.h sh: GUSA atomic rollback support. 2008-01-28 13:18:58 +09:00
bitops.h generic: implement __fls on all 64-bit archs 2008-04-26 19:21:16 +02:00
bug.h sh: Fix up generic BUG build for SH-5. 2008-01-28 13:18:52 +09:00
bugs.h sh: Initial support for the MX-G CPU. 2008-04-18 09:50:01 -07:00
byteorder.h sh: Fix more user header breakage from sh64 integration. 2008-03-14 17:21:09 +09:00
cache.h sh: Split out cache status bits per-CPU family. 2008-01-28 13:18:38 +09:00
cacheflush.h sh: Fix argument page dcache flushing regression. 2008-01-07 13:50:18 +09:00
checksum.h sh: Split out checksum.h in to _32 and _64 variants. 2008-01-28 13:18:45 +09:00
checksum_32.h sh: fix miscompilation of ip_fast_csum with gcc >= 4.3 2008-06-02 12:40:14 +09:00
checksum_64.h sh: comment tidying for sh64->sh migration. 2008-01-28 13:18:58 +09:00
clock.h sh: Implement clk_round_rate() in the clock framework. 2007-07-20 13:29:09 +09:00
cmpxchg-grb.h sh: GUSA atomic rollback support. 2008-01-28 13:18:58 +09:00
cmpxchg-irq.h sh: GUSA atomic rollback support. 2008-01-28 13:18:58 +09:00
cpu-features.h
cputime.h
current.h
delay.h sh: Fix up the sh64 build. 2008-03-06 17:23:15 +09:00
device.h
div64.h
dma-mapping.h sh: declared coherent memory support V2 2008-01-28 13:19:04 +09:00
dma.h sh: dma: Fix CONFIG_SYSFS=n build. 2007-09-21 11:57:53 +09:00
dmabrg.h
edosk7705.h
elf.h sh: Kill off superfluous __KERNEL__ check in asm/elf.h. 2008-01-28 13:19:00 +09:00
emergency-restart.h
entry-macros.S sh: Fix up HAS_SR_RB typo in entry-macros. 2008-02-26 14:28:48 +09:00
errno.h
fb.h fbdev: detect primary display device 2007-07-17 10:23:11 -07:00
fcntl.h
fixmap.h sh: Preparation for uncached jumps through PMB. 2008-01-28 13:18:59 +09:00
flat.h sh: Fix up binfmt_flat compile warnings. 2008-01-28 13:19:00 +09:00
fpu.h sh: Fix TIF_USEDFPU clearing under FPU emulation. 2008-03-26 19:09:21 +09:00
freq.h
futex-irq.h
futex.h asm-*/futex.h should include linux/uaccess.h 2008-04-30 08:29:52 -07:00
gpio.h sh: Add gpio.h stubs for PFC definitions. 2007-09-21 11:57:49 +09:00
hardirq.h
hd64461.h sh: include/asm-sh/: Spelling fixes. 2008-01-28 13:19:01 +09:00
heartbeat.h sh: heartbeat driver update. 2007-09-21 11:57:51 +09:00
hp6xx.h sh: Tidy include/asm-sh/hp6xx.h 2008-02-14 14:22:11 +09:00
hugetlb.h hugetlbfs: common code update for s390 2008-04-28 08:58:25 -07:00
hw_irq.h sh: add interrupt ack code to sh3 2008-05-08 19:52:03 +09:00
i2c-sh7760.h i2c: Renesas SH7760 I2C master driver 2008-04-22 22:16:47 +02:00
ide.h ide: remove ide_default_io_ctl() macro 2008-04-18 00:46:34 +02:00
ilsel.h sh: x3proto: ILSEL IRQ support. 2007-09-21 11:57:48 +09:00
io.h sh64: Fixup the nommu build. 2008-05-08 19:51:37 +09:00
io_generic.h
io_trapped.h sh: trapped io support V2 2008-02-14 14:22:09 +09:00
ioctl.h
ioctls.h sh: termios ioctl definitions 2008-02-14 14:22:07 +09:00
ipcbuf.h
irq.h sh: asm/irq.h needs asm/cpu/irq.h. 2008-02-14 14:22:12 +09:00
irq_regs.h
irqflags.h sh: Split out irqflags.h in to _32 and _64 variants. 2008-01-28 13:18:40 +09:00
irqflags_32.h sh: Split out irqflags.h in to _32 and _64 variants. 2008-01-28 13:18:40 +09:00
irqflags_64.h sh: Split out irqflags.h in to _32 and _64 variants. 2008-01-28 13:18:40 +09:00
Kbuild sh: Fix posix_types.h userspace breakage from sh64 merge. 2008-01-28 13:19:02 +09:00
kdebug.h x86: optimize page faults like all other achitectures and kill notifier cruft 2007-10-16 09:42:50 -07:00
kexec.h
kgdb.h sh: use the common ascii hex helpers 2008-05-16 15:09:08 +09:00
kmap_types.h
kvm.h kvm: provide kvm.h for all architecture: fixes headers_install 2008-04-02 15:28:18 -07:00
lboxre2.h
linkage.h
local.h
machvec.h remove __attribute_used__ 2008-01-28 23:21:18 +01:00
magicpanelr2.h sh: Magic Panel R2 board support. 2007-09-21 11:57:54 +09:00
mc146818rtc.h
microdev.h sh: include/asm-sh/: Spelling fixes. 2008-01-28 13:19:01 +09:00
migor.h sh: Add MigoR header file 2008-04-18 09:50:03 -07:00
mman.h
mmu.h
mmu_context.h sh64: Fixup the nommu build. 2008-05-08 19:51:37 +09:00
mmu_context_32.h sh: Move in the SH-5 mmu_context headers. 2008-01-28 13:18:41 +09:00
mmu_context_64.h sh: Get SH-5 caches working again post-unification. 2008-02-14 14:22:12 +09:00
mmzone.h sh: add memory resources to /proc/iomem 2008-05-08 19:51:51 +09:00
module.h sh: Add SH-5 support to asm/module.h. 2008-01-28 13:18:39 +09:00
msgbuf.h
mutex.h
namei.h
page.h sh: Get SH-5 caches working again post-unification. 2008-02-14 14:22:12 +09:00
param.h sh: Always use CONFIG_HZ for HZ. 2008-01-28 13:19:01 +09:00
parport.h
pci.h sh: Get the SH-5 PCI support building. 2008-01-28 13:18:55 +09:00
percpu.h
pgalloc.h CONFIG_HIGHPTE vs. sub-page page tables. 2008-02-08 09:22:42 -08:00
pgtable.h sh: Stub in page_table_range_init() on nommu. 2008-01-28 13:19:00 +09:00
pgtable_32.h mm: introduce pte_special pte bit 2008-04-28 08:58:23 -07:00
pgtable_64.h mm: introduce pte_special pte bit 2008-04-28 08:58:23 -07:00
pm.h
poll.h
posix_types.h sh: Fix more user header breakage from sh64 integration. 2008-03-14 17:21:09 +09:00
posix_types_32.h sh: Fix posix_types.h userspace breakage from sh64 merge. 2008-01-28 13:19:02 +09:00
posix_types_64.h sh: Fix posix_types.h userspace breakage from sh64 merge. 2008-01-28 13:19:02 +09:00
processor.h sh: Add support for SH7723 CPU subtype. 2008-04-18 09:50:07 -07:00
processor_32.h sh: Fix occasional FPU register corruption under preempt. 2008-03-26 19:02:47 +09:00
processor_64.h sh: Fix occasional FPU register corruption under preempt. 2008-03-26 19:02:47 +09:00
ptrace.h sh: Share bug/debug traps across _32 and _64. 2008-01-28 13:18:50 +09:00
push-switch.h
r7780rp.h sh: r7780rp: Kill off unneded ifdefs for irq setup. 2008-05-08 19:51:44 +09:00
resource.h
rtc.h rtc: rtc-sh: Split out the CPU defs to asm/cpu/. 2008-01-28 13:18:58 +09:00
rts7751r2d.h sh: trapped io support for r2d V2 2008-02-14 14:22:09 +09:00
rwsem.h
scatterlist.h sh: Kill off pgtable.h from scatterlist.h. 2008-01-28 13:19:00 +09:00
sdk7780.h sh: Add support for SDK7780 board. 2008-01-28 13:19:04 +09:00
se.h
se7206.h
se7343.h
se7721.h sh: Add support for Solution Engine SH7721 board 2008-04-18 09:50:02 -07:00
se7722.h sh: SuperH KEYSC keypad data for Solution Engine 7722 2008-04-18 09:50:01 -07:00
se7751.h Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
se7780.h
sections.h sh: Preparation for uncached jumps through PMB. 2008-01-28 13:18:59 +09:00
segment.h
semaphore.h Generic semaphore implementation 2008-04-17 10:42:34 -04:00
sembuf.h
serial.h
setup.h sh: Move zero page param defs somewhere sensible. 2007-10-30 17:32:08 +09:00
sfp-machine.h
sh_bios.h
sh_keysc.h sh: SuperH KEYSC platform driver 2008-04-18 09:50:00 -07:00
shmbuf.h
shmin.h
shmparam.h
sigcontext.h sh: SH-2A FPU support. 2008-01-28 13:18:57 +09:00
siginfo.h
signal.h
smc37c93x.h
smp.h sh: Bring SMP support back from the dead. 2007-09-21 18:32:32 +09:00
snapgear.h sh: intc - remove redundant irq code for sh03, snapgear and titan 2007-09-21 11:57:47 +09:00
socket.h [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
sockios.h
sparsemem.h
spi.h sh: add spi header and r2d platform data V3 2008-01-28 16:24:46 +09:00
spinlock.h sh: Overhaul spinlocks and rwlocks for SH-4A SMP. 2007-09-21 11:57:51 +09:00
spinlock_types.h sh: Overhaul spinlocks and rwlocks for SH-4A SMP. 2007-09-21 11:57:51 +09:00
stat.h sh: Special layout for SH-5 stat.h and user.h. 2008-01-28 13:18:53 +09:00
statfs.h
string.h sh: Split out asm/string.h for sh32 and sh64. 2008-01-28 13:18:40 +09:00
string_32.h sh: Split out asm/string.h for sh32 and sh64. 2008-01-28 13:18:40 +09:00
string_64.h sh: comment tidying for sh64->sh migration. 2008-01-28 13:18:58 +09:00
system.h sh: Create an sh debugfs root. 2008-04-18 09:50:01 -07:00
system_32.h sh: trapped io support V2 2008-02-14 14:22:09 +09:00
system_64.h sh: Preparation for uncached jumps through PMB. 2008-01-28 13:18:59 +09:00
systemh7751.h Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
termbits.h sh: termios ioctl definitions 2008-02-14 14:22:07 +09:00
termios.h sh: termios ioctl definitions 2008-02-14 14:22:07 +09:00
thread_info.h remove __attribute_used__ 2008-01-28 23:21:18 +01:00
timer.h
timex.h
titan.h
tlb.h sh: asm/tlb.h needs linux/pagemap.h for CONFIG_SWAP=n. 2008-02-14 14:22:11 +09:00
tlb_64.h sh64: Fixup the nommu build. 2008-05-08 19:51:37 +09:00
tlbflush.h remove unused flush_tlb_pgtables 2007-10-19 11:53:34 -07:00
topology.h sh: Stub in cpu_to_node() and friends for NUMA build. 2008-05-08 13:40:17 +09:00
types.h sh: types: use <asm-generic/int-*.h> for the sh architecture 2008-05-02 16:18:40 -07:00
uaccess.h sh: make copy_to/from_user() static inline 2008-02-14 14:22:09 +09:00
uaccess_32.h sh: Fix up __access_ok() check for nommu. 2008-04-18 09:50:02 -07:00
uaccess_64.h sh64: Fixup the nommu build. 2008-05-08 19:51:37 +09:00
ubc.h sh: remove support for sh7300 and solution engine 7300 2007-07-26 15:37:57 +09:00
ucontext.h
unaligned.h kernel: Move arches to use common unaligned access 2008-04-29 08:06:27 -07:00
unistd.h sh: Split out syscall ABI for _32 and _64 variants. 2008-01-28 13:18:45 +09:00
unistd_32.h sh: Wire up new timerfd syscalls. 2008-02-14 14:22:08 +09:00
unistd_64.h sh: Wire up new timerfd syscalls. 2008-02-14 14:22:08 +09:00
user.h Sanitize the type of struct user.u_ar0 2008-02-07 08:42:30 -08:00
vga.h sh: Add a dummy vga.h. 2007-11-07 20:19:30 +09:00
watchdog.h
xor.h