Robert Richter 527e26af37 perf_counter, x86: protect per-cpu variables with compile barriers only ... Per-cpu variables needn't to be protected with cpu barriers (smp_wmb()). Protection is only needed for preemption on the same cpu (rescheduling or the nmi handler). This can be done using a compiler barrier only. [ Impact: micro-optimization ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-6-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2009-04-29 14:51:02 +02:00
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x86	perf_counter, x86: protect per-cpu variables with compile barriers only	2009-04-29 14:51:02 +02:00
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