perf_event: Cleanup for cpu_clock_perf_event_update()

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Using atomic64_xchg() instead of atomic64_read() and
atomic64_set().

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <4B1F19DC.90204@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Xiao Guangrong 2009-12-09 11:30:36 +08:00 • committed by Ingo Molnar

parent b93f7978ad

commit ec89a06fd4

1 changed files with 1 additions and 2 deletions

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kernel/perf_event.c

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