perf: Shrink hw_perf_event
Use hw_perf_event::period_left instead of hw_perf_event::remaining and win back 8 bytes. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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