| commit | b8ebfd3f7113b63dda93d76bfec638c00e6bd514 | [log] [tgz] |
|---|---|---|
| author | Oleg Nesterov <oleg@redhat.com> | Mon Jun 17 19:02:04 2013 +0200 |
| committer | Steven Rostedt <rostedt@goodmis.org> | Thu Jul 18 21:31:27 2013 -0400 |
| tree | 5a72a20c5fa86fe1c284308111132345f249c671 | |
| parent | d611851b421731e2afd9cb956daae001af57a423 [diff] |
tracing/function: Avoid perf_trace_buf_*() if event_function.perf_events is empty perf_trace_buf_prepare() + perf_trace_buf_submit(head, task => NULL) make no sense if hlist_empty(head). Change perf_ftrace_function_call() to check event_function.perf_events beforehand. Link: http://lkml.kernel.org/r/20130617170204.GA19803@redhat.com Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>