diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2015-04-15 10:51:26 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-04-16 12:08:21 +0200 |
| commit | 6a907738ab9840ca3d71c22cd28fba4cbae7f7ce (patch) | |
| tree | 1398ad6eb538beffbdb0db9b2a648d7d7ae0905c /arch/x86/ia32 | |
| parent | c0f6feba784e1087b905ad097d2d9ac0aaf744a5 (diff) | |
x86/asm: Enable fast 32-bit put_user_64() for copy_to_user()
For fixed sized copies, copy_to_user() will utilize
__put_user_size() fastpaths. However, it is missing the
translation for 64-bit copies on x86/32.
Testing on a Pinetrail Atom, the 64 bit put_user() fastpath
is substantially faster than the generic copy_to_user()
fallback.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: intel-gfx@lists.freedesktop.org
Link: http://lkml.kernel.org/r/1429091486-11443-1-git-send-email-chris@chris-wilson.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/ia32')
0 files changed, 0 insertions, 0 deletions