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Thomas Gleixner b6a8b316c6 [PATCH] i386: fix file_read_actor() and pipe_read() for original i386 systems ... The __copy_to_user_inatomic() calls in file_read_actor() and pipe_read() are broken on original i386 machines, where WP-works-ok == false, as __copy_to_user_inatomic() on such systems calls functions which might sleep and/or contain cond_resched() calls inside of a kmap_atomic() region. The original check for WP-works-ok was in access_ok(), but got moved during the 2.5 series to fix a race vs. swap. Return the number of bytes to copy in the case where we are in an atomic region, so the non atomic code pathes in file_read_actor() and pipe_read() are taken. This could be optimized to avoid the kmap_atomicby moving the check for WP-works-ok into fault_in_pages_writeable(), but this is more intrusive and can be done later. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		18 years ago
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Makefile	…
bitops.c	…
checksum.S	…
delay.c	…
getuser.S	…
memcpy.c	…
mmx.c	…
msr-on-cpu.c	…
putuser.S	…
semaphore.S	…
strstr.c	…
usercopy.c	[PATCH] i386: fix file_read_actor() and pipe_read() for original i386 systems	18 years ago