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
..
ashldi3.c
ashrdi3.c
csum_partial.S	[MIPS] csum_partial and copy in parallel	2007-01-08 21:41:04 +00:00
iomap-pci.c	[MIPS] Iomap implementation.	2007-02-18 21:31:34 +00:00
iomap.c	[MIPS] Iomap implementation.	2007-02-18 21:31:34 +00:00
libgcc.h
lshrdi3.c
Makefile	[MIPS] Fixup copy_from_user_inatomic	2007-02-20 01:26:42 +00:00
memcpy-inatomic.S	[MIPS] Fixup copy_from_user_inatomic	2007-02-20 01:26:42 +00:00
memcpy.S
memset.S	[MIPS] Unify memset.S	2007-02-06 16:53:12 +00:00
promlib.c
strlen_user.S
strncpy_user.S
strnlen_user.S
uncached.c	[MIPS] Fix warnings in run_uncached on 32bit kernel	2007-02-06 16:53:24 +00:00