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
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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	…
lasat	…
mach-atlas	…
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	…
mach-excite	…
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	…
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	…
mach-pb1x00	…
mach-pnx8550	…
mach-qemu	…
mach-rm	[MIPS] Support for several more SNI RM models.	2007-02-18 21:31:37 +00:00
mach-sibyte	…
mach-sim	…
mach-vr41xx	[MIPS] Make I8259A_IRQ_BASE customizable	2007-02-06 16:53:09 +00:00
mach-wrppmc	…
mach-yosemite	…
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	…
sn	[MIPS] IP27: Move definition of nic_t to its sole user.	2006-12-12 01:46:24 +00:00
tx4927	…
tx4938	…
vr41xx	[MIPS] Make I8259A_IRQ_BASE customizable	2007-02-06 16:53:09 +00:00
xtalk	…
8253pit.h	…
Kbuild	…
a.out.h	…
abi.h	[MIPS] signals: Share even more code.	2007-02-18 21:31:35 +00:00
addrspace.h	…
asm.h	…
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	…
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	…
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	…
cpu-info.h	…
cpu.h	…
cputime.h	…
current.h	…
debug.h	…
delay.h	…
device.h	…
div64.h	…
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	…
fixmap.h	…
floppy.h	…
fpregdef.h	…
fpu.h	…
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	…
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	…
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	…
irqflags.h	[MIPS] SMTC: Instant IPI replay.	2007-01-23 18:26:47 +00:00
isadep.h	…
jazz.h	…
jazzdma.h	…
kexec.h	…
kmap_types.h	…
kspd.h	…
linkage.h	…
local.h	…
m48t35.h	…
m48t37.h	…
marvell.h	…
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	…
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	…
mmzone.h	…
module.h	…
msc01_ic.h	…
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	…
pgtable-64.h	…
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	…
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	…
stacktrace.h	…
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	…
timex.h	…
titan_dep.h	…
tlb.h	…
tlbdebug.h	…
tlbflush.h	…
topology.h	…
traps.h	…
tx3912.h	…
types.h	…
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	…
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	…