summaryrefslogtreecommitdiff
path: root/arch/x86/lib/copy_user_64.S
diff options
context:
space:
mode:
authorFenghua Yu <fenghua.yu@intel.com>2011-05-17 15:29:14 -0700
committerH. Peter Anvin <hpa@linux.intel.com>2011-05-17 15:40:27 -0700
commite365c9df2f2f001450decf9512412d2d5bd1cdef (patch)
tree3670f466631b7ddeb710f54899020ee4a792edc4 /arch/x86/lib/copy_user_64.S
parent9072d11da15a71e086eab3b5085184f2c1d06913 (diff)
x86, mem: clear_page_64.S: Support clear_page() with enhanced REP MOVSB/STOSB
Intel processors are adding enhancements to REP MOVSB/STOSB and the use of REP MOVSB/STOSB for optimal memcpy/memset or similar functions is recommended. Enhancement availability is indicated by CPUID.7.0.EBX[9] (Enhanced REP MOVSB/ STOSB). Support clear_page() with rep stosb for processor supporting enhanced REP MOVSB /STOSB. On processors supporting enhanced REP MOVSB/STOSB, the alternative clear_page_c_e function using enhanced REP STOSB overrides the original function and the fast string function. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Link: http://lkml.kernel.org/r/1305671358-14478-6-git-send-email-fenghua.yu@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/lib/copy_user_64.S')
0 files changed, 0 insertions, 0 deletions