x86, mem: copy_user_64.S: Support copy_to/from_user by enhanced REP MOVSB/STOSB

Browse source

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>

...

This commit is contained in:

Fenghua Yu 2011-05-17 15:29:15 -07:00 • committed by H. Peter Anvin

parent e365c9df2f

commit 4307bec934

1 changed files with 55 additions and 10 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

65

arch/x86/lib/copy_user_64.S

View file