Ralf Baechle e03b526932 [MIPS] Fixup copy_from_user_inatomic ... From the 01408c4939 log message: The problem is that when we write to a file, the copy from userspace to pagecache is first done with preemption disabled, so if the source address is not immediately available the copy fails *and* *zeros* *the* *destination*. This is a problem because a concurrent read (which admittedly is an odd thing to do) might see zeros rather that was there before the write, or what was there after, or some mixture of the two (any of these being a reasonable thing to see). If the copy did fail, it will immediately be retried with preemption re-enabled so any transient problem with accessing the source won't cause an error. The first copying does not need to zero any uncopied bytes, and doing so causes the problem. It uses copy_from_user_atomic rather than copy_from_user so the simple expedient is to change copy_from_user_atomic to *not* zero out bytes on failure. < --- end cite --- > This patch finally implements at least a not so pretty solution by duplicating the relevant part of __copy_user. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>		2007-02-20 01:26:42 +00:00
..
arc
ddb5xxx	[MIPS] Make I8259A_IRQ_BASE customizable	2007-02-06 16:53:09 +00:00
dec	[TC] TURBOchannel support for the DECstation	2007-02-09 16:23:16 +00:00
emma2rh	[MIPS] Define MIPS_CPU_IRQ_BASE in generic header	2007-02-06 16:53:08 +00:00
ip32
jmr3927	[MIPS] Complete fixes after removal of pt_regs argument to int handlers.	2006-10-08 02:38:28 +01:00
lasat
mach-atlas	[MIPS] Atlas: update interrupt handling	2006-09-27 13:37:42 +01:00
mach-au1x00	[MIPS] Alchemy: Fix PCI-memory access	2007-02-06 16:53:24 +00:00
mach-cobalt	[MIPS] Define MIPS_CPU_IRQ_BASE in generic header	2007-02-06 16:53:08 +00:00
mach-db1x00
mach-dec
mach-emma2rh	[MIPS] Define MIPS_CPU_IRQ_BASE in generic header	2007-02-06 16:53:08 +00:00
mach-ev64120	[MIPS] Add UART IRQ number for EV64120	2006-10-01 23:16:59 +01:00
mach-excite	[MIPS] s/__ASSEMBLER__/__ASSEMBLY__/ for clarity sake.	2006-09-27 13:37:57 +01:00
mach-generic	[MIPS] Unify dma-{coherent,noncoherent.ip27,ip32}	2007-02-13 22:40:50 +00:00
mach-ip22
mach-ip27	[MIPS] Unify dma-{coherent,noncoherent.ip27,ip32}	2007-02-13 22:40:50 +00:00
mach-ip32	[MIPS] Unify dma-{coherent,noncoherent.ip27,ip32}	2007-02-13 22:40:50 +00:00
mach-ja	[MIPS] Use the proper technical term for naming some of the cache macros.	2006-07-13 21:26:04 +01:00
mach-jazz	[MIPS] Unify dma-{coherent,noncoherent.ip27,ip32}	2007-02-13 22:40:50 +00:00
mach-jmr3927
mach-lasat
mach-mips	[MIPS] Define MIPS_CPU_IRQ_BASE in generic header	2007-02-06 16:53:08 +00:00
mach-ocelot
mach-ocelot3	[MIPS] Use the proper technical term for naming some of the cache macros.	2006-07-13 21:26:04 +01:00
mach-pb1x00
mach-pnx8550	[MIPS] PNX8550 fixups	2006-10-04 18:06:15 +01:00
mach-qemu	[MIPS] Qemu does not have D-cache aliases	2006-09-27 13:37:49 +01:00
mach-rm	[MIPS] Support for several more SNI RM models.	2007-02-18 21:31:37 +00:00
mach-sibyte	[MIPS] Use the proper technical term for naming some of the cache macros.	2006-07-13 21:26:04 +01:00
mach-sim	[MIPS] Use the proper technical term for naming some of the cache macros.	2006-07-13 21:26:04 +01:00
mach-vr41xx	[MIPS] Make I8259A_IRQ_BASE customizable	2007-02-06 16:53:09 +00:00
mach-wrppmc
mach-yosemite	[MIPS] Use the proper technical term for naming some of the cache macros.	2006-07-13 21:26:04 +01:00
mips-boards	[MIPS] prom_free_prom_memory cleanup	2007-02-06 16:53:09 +00:00
pci
sgi	[MIPS] Define MIPS_CPU_IRQ_BASE in generic header	2007-02-06 16:53:08 +00:00
sibyte	[MIPS] Fixup migration to GENERIC_TIME	2006-10-31 20:13:23 +00:00
sn	[MIPS] IP27: Move definition of nic_t to its sole user.	2006-12-12 01:46:24 +00:00
tx4927
tx4938	fix file specification in comments	2006-10-03 23:01:26 +02:00
vr41xx	[MIPS] Make I8259A_IRQ_BASE customizable	2007-02-06 16:53:09 +00:00
xtalk
8253pit.h
a.out.h
abi.h	[MIPS] signals: Share even more code.	2007-02-18 21:31:35 +00:00
addrspace.h	[MIPS] Use "long" for 64-bit values on 64-bit kernel.	2006-11-30 01:14:43 +00:00
asm.h	[MIPS] 16K & 64K page size fixes	2006-11-01 17:46:09 +00:00
asmmacro-32.h
asmmacro-64.h
asmmacro.h
atomic.h	[MIPS] Improve branch prediction in ll/sc atomic operations.	2007-02-13 22:40:50 +00:00
auxvec.h
barrier.h	[MIPS] Cleanup memory barriers for weakly ordered systems.	2006-12-04 22:43:14 +00:00
bcache.h
bitops.h	[MIPS] Use MIPS R2 instructions for bitops.	2007-02-18 21:31:35 +00:00
bootinfo.h	[MIPS] prom_free_prom_memory cleanup	2007-02-06 16:53:09 +00:00
branch.h
break.h
bug.h	[MIPS] Use conditional traps for BUG_ON on MIPS II and better.	2006-11-30 01:14:50 +00:00
bugs.h
byteorder.h
cache.h
cachectl.h
cacheflush.h	[PATCH] Optimize D-cache alias handling on fork	2006-12-13 09:27:08 -08:00
cacheops.h
checksum.h	[MIPS] Fix wrong checksum calculation on 64-bit MIPS	2007-01-24 19:23:22 +00:00
compat-signal.h	[MIPS] signals: Share even more code.	2007-02-18 21:31:35 +00:00
compat.h	[MIPS] compat.h uses struct pt_regs so needs to include ptrace.h.	2006-12-12 01:46:24 +00:00
compiler.h
cpu-features.h	[MIPS] Use the proper technical term for naming some of the cache macros.	2006-07-13 21:26:04 +01:00
cpu-info.h	[MIPS] Fix alignment hole in struct cache_desc; shrink struct.	2006-11-30 01:14:45 +00:00
cpu.h	[MIPS] Use the proper technical term for naming some of the cache macros.	2006-07-13 21:26:04 +01:00
cputime.h
current.h
debug.h
delay.h
device.h	Driver core: add dev_archdata to struct device	2006-12-01 14:52:01 -08:00
div64.h	[MIPS] Fixup migration to GENERIC_TIME	2006-10-31 20:13:23 +00:00
dma-mapping.h	[MIPS] Don't claim we support dma_declare_coherent_memory - we don't.	2007-02-13 22:40:50 +00:00
dma.h	[MIPS] Setup min_low_pfn/max_low_pfn correctly	2007-02-06 16:53:13 +00:00
ds1216.h	[MIPS] Support for several more SNI RM models.	2007-02-18 21:31:37 +00:00
ds1286.h
ds1742.h
dsp.h
elf.h
emergency-restart.h
errno.h
fcntl.h	[MIPS] Remove F_SETSIG and F_GETSIG in favor of the asm-generic definitions.	2006-09-27 13:37:48 +01:00
fixmap.h	[MIPS] Fix aliasing bug in copy_to_user_page / copy_from_user_page	2006-10-21 23:17:35 +01:00
floppy.h
fpregdef.h
fpu.h	[MIPS] Make sure cpu_has_fpu is used only in atomic context	2006-10-09 23:20:48 +01:00
fpu_emulator.h
futex.h	[PATCH] mm: pagefault_{disable,enable}()	2006-12-07 08:39:21 -08:00
gdb-stub.h
gfx.h
gt64120.h	[MIPS] Rewrite GALILEO_INL/GALILEO_OUTL to GT_READ/GT_WRITE	2006-11-30 01:14:43 +00:00
gt64240.h
hardirq.h
hazards.h	[MIPS] vr41xx: need one more nop with mtc0_tlbw_hazard()	2007-01-24 19:23:21 +00:00
highmem.h	[PATCH] mm: k{,um}map_atomic() vs in_atomic()	2006-12-07 08:39:21 -08:00
hw_irq.h
i8259.h	[MIPS] Make I8259A_IRQ_BASE customizable	2007-02-06 16:53:09 +00:00
ide.h
inst.h	[MIPS] Fix rdhwr_op definition.	2006-07-13 21:26:08 +01:00
inventory.h
io.h	[MIPS] Iomap implementation.	2007-02-18 21:31:34 +00:00
ioctl.h
ioctls.h
ipc.h
ipcbuf.h
irq.h	[MIPS] Make I8259A_IRQ_BASE customizable	2007-02-06 16:53:09 +00:00
irq_cpu.h	[MIPS] Define MIPS_CPU_IRQ_BASE in generic header	2007-02-06 16:53:08 +00:00
irq_regs.h	[MIPS] Complete fixes after removal of pt_regs argument to int handlers.	2006-10-08 02:38:28 +01:00
irqflags.h	[MIPS] SMTC: Instant IPI replay.	2007-01-23 18:26:47 +00:00
isadep.h
jazz.h
jazzdma.h
Kbuild	[MIPS] Have headers_install install <asm/cachectl.h> and <asm/sysmips.h>.	2006-09-27 13:37:56 +01:00
kexec.h	[MIPS] Add support for kexec	2006-11-30 01:14:44 +00:00
kmap_types.h
kspd.h
linkage.h
local.h
m48t35.h
m48t37.h
marvell.h	[MIPS] Complete fixes after removal of pt_regs argument to int handlers.	2006-10-08 02:38:28 +01:00
mc146818-time.h
mc146818rtc.h
mips_mt.h	[MIPS] VPE: Sprinkle device model code into code to make udev happier.	2007-02-10 22:38:42 +00:00
mipsmtregs.h	[MIPS] MT: Nuke duplicate mips_mt_regdump() prototype.	2007-02-06 16:53:24 +00:00
mipsprom.h
mipsregs.h	[MIPS] Remove unused R10000 performance counter definitions.	2006-11-30 01:14:45 +00:00
mman.h	[PATCH] Remove final references to deprecated "MAP_ANON" page protection flag	2007-02-11 10:51:17 -08:00
mmu.h
mmu_context.h	[MIPS] Reformat missformated SMTC bits.	2006-09-27 13:37:49 +01:00
mmzone.h
module.h
msc01_ic.h	[MIPS] Complete fixes after removal of pt_regs argument to int handlers.	2006-10-08 02:38:28 +01:00
msgbuf.h
mutex.h
namei.h
nile4.h
paccess.h
page.h	[MIPS] FLATMEM: introduce PHYS_OFFSET.	2007-02-06 16:53:13 +00:00
param.h
parport.h
pci.h	[MIPS] Iomap implementation.	2007-02-18 21:31:34 +00:00
percpu.h
pgalloc.h	[MIPS] Add external declaration of pagetable_init() to pgalloc.h	2007-02-18 21:31:36 +00:00
pgtable-32.h	[MIPS] pte_offset(dir,addr): parenthesis fix	2006-12-06 20:16:08 +00:00
pgtable-64.h	[MIPS] pte_offset(dir,addr): parenthesis fix	2006-12-06 20:16:08 +00:00
pgtable-bits.h
pgtable.h	[PATCH] mm: mremap correct rmap accounting	2007-01-30 08:33:32 -08:00
pmon.h
poll.h
posix_types.h
prctl.h
prefetch.h
processor.h
ptrace.h	[MIPS] Move die and die_if_kernel() from system.h to ptrace.h	2006-12-10 21:52:11 +00:00
qemu.h
r4kcache.h
reboot.h
reg.h
regdef.h
resource.h
rm9k-ocd.h
rtc.h
rtlx.h	[MIPS] Define MIPS_CPU_IRQ_BASE in generic header	2007-02-06 16:53:08 +00:00
scatterlist.h
sections.h	[MIPS] Remove _fdata from asm-mips/sections.h	2007-02-06 16:53:15 +00:00
segment.h
semaphore.h
sembuf.h
serial.h	[MIPS] Remove IT8172-based platforms, ITE 8172G and Globespan IVR support.	2006-10-03 17:59:17 +01:00
setup.h	[PATCH] cleanup asm/setup.h userspace visibility	2006-12-07 08:39:46 -08:00
sgialib.h
sgiarcs.h
sgidefs.h
shmbuf.h
shmparam.h
sigcontext.h	[MIPS] Fix struct sigcontext for N32 userland	2007-02-20 01:26:42 +00:00
siginfo.h
signal.h	[MIPS] signals: Share even more code.	2007-02-18 21:31:35 +00:00
sim.h
smp.h
smtc.h
smtc_ipi.h	[MIPS] SMTC: Make a bunch of functions and variables static.	2007-02-06 16:53:22 +00:00
smtc_proc.h
sni.h	[MIPS] Support for several more SNI RM models.	2007-02-18 21:31:37 +00:00
socket.h
sockios.h
sparsemem.h
spinlock.h	[MIPS] Improve branch prediction in ll/sc atomic operations.	2007-02-13 22:40:50 +00:00
spinlock_types.h
stackframe.h	[MIPS] Optimize and cleanup get_saved_sp, set_saved_sp	2006-10-11 19:30:59 +01:00
stacktrace.h	[MIPS] Make unwind_stack() can dig into interrupted context	2006-10-01 23:16:59 +01:00
stat.h
statfs.h
string.h
suspend.h
sysmips.h
system.h	[MIPS] Improve branch prediction in ll/sc atomic operations.	2007-02-13 22:40:50 +00:00
termbits.h	[PATCH] tty: preparatory structures for termios revamp	2006-12-08 08:28:56 -08:00
termios.h	[PATCH] consolidate line discipline number definitions	2007-02-11 10:51:26 -08:00
thread_info.h	[MIPS] Fix APM build	2007-01-24 19:23:21 +00:00
time.h	[MIPS] mips HPT cleanup: make clocksource_mips public	2006-11-30 01:14:49 +00:00
timex.h	[MIPS] Fix errors detected by "make headers_check"	2006-09-27 13:37:40 +01:00
titan_dep.h
tlb.h
tlbdebug.h
tlbflush.h
topology.h
traps.h
tx3912.h
types.h	[PATCH] Centralise definitions of sector_t and blkcnt_t	2006-12-04 19:41:15 -08:00
uaccess.h	[MIPS] Fixup copy_from_user_inatomic	2007-02-20 01:26:42 +00:00
ucontext.h
unaligned.h
unistd.h	[PATCH] remove kernel syscalls	2006-12-07 08:39:37 -08:00
user.h	[MIPS] Fix errors detected by "make headers_check"	2006-09-27 13:37:40 +01:00
vga.h
vpe.h
war.h	[MIPS] Rename SNI_RM200_PCI to just SNI_RM preparing for more RM machines	2006-12-09 01:03:58 +00:00
watch.h
wbflush.h
xor.h
xxs1500.h