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Commit 5553be26 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
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perf, x86: Fixup the precise_ip computation 



In case we don't have PEBS, the LBR fixup doesn't make sense.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: default avatarStephane Eranian <eranian@google.com>
LKML-Reference: <20101019134808.354429461@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 65af94ba

arch/x86/kernel/cpu/perf_event.c

+5 −4
Original line number Diff line number Diff line
@@ -497,12 +497,13 @@ static int x86_pmu_hw_config(struct perf_event *event) 
		int precise = 0;



		/* Support for constant skid */

		if (x86_pmu.pebs)

		if (x86_pmu.pebs) {

			precise++;



			/* Support for IP fixup */

			if (x86_pmu.lbr_nr)

				precise++;

		}



		if (event->attr.precise_ip > precise)

			return -EOPNOTSUPP;