]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
locking/csd_lock: Use smp_cond_acquire() in csd_lock_wait()
authorDavidlohr Bueso <dave@stgolabs>
Thu, 10 Mar 2016 01:55:36 +0000 (17:55 -0800)
committerIngo Molnar <mingo@kernel.org>
Thu, 10 Mar 2016 09:28:35 +0000 (10:28 +0100)
commit38460a2178d225b39ade5ac66586c3733391cf86
tree189a70cb0386f09af432c2580b03c404bc6e24b3
parent90d1098478fb08a1ef166fe91622d8046869e17b
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>
kernel/smp.c