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authorHuang Ying <ying.huang@intel.com>2011-09-08 14:00:44 +0800
committerIngo Molnar <mingo@elte.hu>2011-10-04 12:43:39 +0200
commita3127336b71f6833d1483c856dce91fe558dc3a9 (patch)
treec025279c450994f25661c2ab004f0be98997cf8a /lib/debugobjects.c
parent2c30245c65e8ebc3080b75ce65572ab8140bad0b (diff)
llist: Move cpu_relax() to after the cmpxchg()
If in llist_add()/etc. functions the first cmpxchg() call succeeds, it is not necessary to use cpu_relax() before the cmpxchg(). So cpu_relax() in a busy loop involving cmpxchg() should go after cmpxchg() instead of before that. This patch fixes this for all involved llist functions. Signed-off-by: Huang Ying <ying.huang@intel.com> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1315461646-1379-4-git-send-email-ying.huang@intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'lib/debugobjects.c')
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