diff options
Diffstat (limited to 'arch/x86/events/intel/ds.c')
| -rw-r--r-- | arch/x86/events/intel/ds.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index ce7211a07c0b..8584b90d8e0b 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -570,11 +570,12 @@ int intel_pmu_drain_bts_buffer(void) * We will overwrite the from and to address before we output * the sample. */ + rcu_read_lock(); perf_prepare_sample(&header, &data, event, ®s); if (perf_output_begin(&handle, event, header.size * (top - base - skip))) - return 1; + goto unlock; for (at = base; at < top; at++) { /* Filter out any records that contain kernel addresses. */ @@ -593,6 +594,8 @@ int intel_pmu_drain_bts_buffer(void) /* There's new data available. */ event->hw.interrupts++; event->pending_kill = POLL_IN; +unlock: + rcu_read_unlock(); return 1; } |