sched: Don't call task_group() too many times in set_task_rq()
It improves perfomance, especially if autogroup is enabled. The size of set_task_rq() was 0x180 and now it is 0xa0. Signed-off-by: NAndrew Vagin <avagin@openvz.org> Acked-by: NPaul Turner <pjt@google.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1321020240-3874331-1-git-send-email-avagin@openvz.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>
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