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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-26 10:14:39 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-26 10:14:39 -0700
commit4ae73f2d53255c388d50bf83c1681112a6f9cba1 (patch)
tree0b0d9adce97c2270a427e1f1c19c977b8f066d5b /lib
parentda89fb165e5e51a2ec1ff8a0ff6bc052d1068184 (diff)
x86: use generic strncpy_from_user routine
The generic strncpy_from_user() is not really optimal, since it is designed to work on both little-endian and big-endian. And on little-endian you can simplify much of the logic to find the first zero byte, since little-endian arithmetic doesn't have to worry about the carry bit propagating into earlier bytes (only later bytes, which we don't care about). But I have patches to make the generic routines use the architecture- specific <asm/word-at-a-time.h> infrastructure, so that we can regain the little-endian optimizations. But before we do that, switch over to the generic routines to make the patches each do just one well-defined thing. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
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