sched: remove extra call overhead for schedule()
Lai Jiangshan's patch reminded me that I promised Nick to remove that extra call overhead in schedule(). Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20090313112300.927414207@chello.nl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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