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perf, x86: Fix LBR read-out

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Don't decrement the TOS twice...

Signed-off-by: Peter 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: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2010-03-09 11:51:02 +01:00 committed by Ingo Molnar
parent d80c7502ff
commit 63fb3f9b23
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kernel/cpu/perf_event_intel_lbr.c
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@ -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;