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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-26 17:14:39 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-26 17:14:39 (GMT) |
commit | 4ae73f2d53255c388d50bf83c1681112a6f9cba1 (patch) | |
tree | 0b0d9adce97c2270a427e1f1c19c977b8f066d5b /include/asm-generic/word-at-a-time.h | |
parent | da89fb165e5e51a2ec1ff8a0ff6bc052d1068184 (diff) | |
download | linux-4ae73f2d53255c388d50bf83c1681112a6f9cba1.tar.xz |
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 'include/asm-generic/word-at-a-time.h')
0 files changed, 0 insertions, 0 deletions