diff options
Diffstat (limited to 'kernel/events/ring_buffer.c')
| -rw-r--r-- | kernel/events/ring_buffer.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c index 60be55a64040..c49bab42dc57 100644 --- a/kernel/events/ring_buffer.c +++ b/kernel/events/ring_buffer.c @@ -230,10 +230,24 @@ out: return -ENOSPC; } +int perf_output_begin_forward(struct perf_output_handle *handle, + struct perf_event *event, unsigned int size) +{ + return __perf_output_begin(handle, event, size, false); +} + +int perf_output_begin_backward(struct perf_output_handle *handle, + struct perf_event *event, unsigned int size) +{ + return __perf_output_begin(handle, event, size, true); +} + int perf_output_begin(struct perf_output_handle *handle, struct perf_event *event, unsigned int size) { - return __perf_output_begin(handle, event, size, false); + + return __perf_output_begin(handle, event, size, + unlikely(is_write_backward(event))); } unsigned int perf_output_copy(struct perf_output_handle *handle, |