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authorDavidlohr Bueso <dave@stgolabs>2016-03-09 17:55:36 -0800
committerIngo Molnar <mingo@kernel.org>2016-03-10 10:28:35 +0100
commit38460a2178d225b39ade5ac66586c3733391cf86 (patch)
tree189a70cb0386f09af432c2580b03c404bc6e24b3 /init
parent90d1098478fb08a1ef166fe91622d8046869e17b (diff)
downloadlinux-38460a2178d225b39ade5ac66586c3733391cf86.tar.gz
locking/csd_lock: Use smp_cond_acquire() in csd_lock_wait()
We can micro-optimize this call and mildly relax the barrier requirements by relying on ctrl + rmb, keeping the acquire semantics. In addition, this is pretty much the now standard for busy-waiting under such restraints. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: dave@stgolabs.net Link: http://lkml.kernel.org/r/1457574936-19065-3-git-send-email-dbueso@suse.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
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