perf, x86: Fix LBR read-out
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>
diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
index f278136..df4c98e2 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_lbr.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
@@ -129,7 +129,7 @@
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 @@
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;