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Commit 63fb3f9b authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

perf, x86: Fix LBR read-out 



Don't decrement the TOS twice...

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: paulus@samba.org
Cc: eranian@google.com
Cc: robert.richter@amd.com
Cc: fweisbec@gmail.com
LKML-Reference: <new-submission>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent d80c7502

arch/x86/kernel/cpu/perf_event_intel_lbr.c

+2 −2
Original line number Diff line number Diff line
@@ -129,7 +129,7 @@ static void intel_pmu_lbr_read_32(struct cpu_hw_events *cpuc) 
	u64 tos = intel_pmu_lbr_tos();

	int i;



	for (i = 0; i < x86_pmu.lbr_nr; i++, tos--) {

	for (i = 0; i < x86_pmu.lbr_nr; i++) {

		unsigned long lbr_idx = (tos - i) & mask;

		union {

			struct {
@@ -162,7 +162,7 @@ static void intel_pmu_lbr_read_64(struct cpu_hw_events *cpuc) 
	u64 tos = intel_pmu_lbr_tos();

	int i;



	for (i = 0; i < x86_pmu.lbr_nr; i++, tos--) {

	for (i = 0; i < x86_pmu.lbr_nr; i++) {

		unsigned long lbr_idx = (tos - i) & mask;

		u64 from, to, flags = 0;