locking/qspinlock/x86: Only emit the test-and-set fallback when building guest support
authorPeter Zijlstra <peterz@infradead.org>
Sat, 5 Sep 2015 14:55:05 +0000 (16:55 +0200)
committerIngo Molnar <mingo@kernel.org>
Fri, 11 Sep 2015 05:50:12 +0000 (07:50 +0200)
commita6b277857fd2c990bc208ca1958d3f34d26052f7
tree6d0095d2e38945130bb730b70ca1f98b17759238
parent43b3f02899f74ae9914a39547cc5492156f0027a
locking/qspinlock/x86: Only emit the test-and-set fallback when building guest support

Only emit the test-and-set fallback for Hypervisors lacking
PARAVIRT_SPINLOCKS support when building for guests.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # 4.2
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/include/asm/qspinlock.h