Peter Zijlstra 0c44c2d0f4 x86: Use asm goto to implement better modify_and_test() functions ... Linus suggested using asm goto to get rid of the typical SETcc + TEST instruction pair -- which also clobbers an extra register -- for our typical modify_and_test() functions. Because asm goto doesn't allow output fields it has to include an unconditinal memory clobber when it changes a memory variable to force a reload. Luckily all atomic ops already imply a compiler barrier to go along with their memory barrier semantics. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/n/tip-0mtn9siwbeo1d33bap1422se@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>		2013-09-25 13:53:08 +02:00
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asm	x86: Use asm goto to implement better modify_and_test() functions	2013-09-25 13:53:08 +02:00
uapi/asm	kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi	2013-08-26 12:46:01 +03:00