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(parent: e365c9d) | patch
x86, mem: copy_user_64.S: Support copy_to/from_user by enhanced REP MOVSB/STOSB
authorFenghua Yu <fenghua.yu@intel.com>
Tue, 17 May 2011 22:29:15 +0000 (15:29 -0700)
committerH. Peter Anvin <hpa@linux.intel.com>
Tue, 17 May 2011 22:40:28 +0000 (15:40 -0700)
commit4307bec9344aed83f8107c3eb4285bd9d218fc10
treed18d0b7e6c5d0a93fc84504d546add5f1ca09c5atree | snapshot
parente365c9df2f2f001450decf9512412d2d5bd1cdefcommit | diff
x86, mem: copy_user_64.S: Support copy_to/from_user by enhanced REP MOVSB/STOSB

Support copy_to_user/copy_from_user() by enhanced REP MOVSB/STOSB.
On processors supporting enhanced REP MOVSB/STOSB, the alternative
copy_user_enhanced_fast_string function using enhanced rep movsb overrides the
original function and the fast string function.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1305671358-14478-7-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
arch/x86/lib/copy_user_64.S diff | blob | history
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