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authorOleg Nesterov <oleg@redhat.com>2013-06-17 19:02:04 +0200
committerSteven Rostedt <rostedt@goodmis.org>2013-07-18 21:31:27 -0400
commitb8ebfd3f7113b63dda93d76bfec638c00e6bd514 (patch)
tree5a72a20c5fa86fe1c284308111132345f249c671 /Documentation/00-INDEX
parentd611851b421731e2afd9cb956daae001af57a423 (diff)
downloadlinux-b8ebfd3f7113b63dda93d76bfec638c00e6bd514.tar.bz2
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>
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