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>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
index f278136bf918..df4c98e26c5b 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 @@ 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;