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| author | Steven Rostedt <rostedt@goodmis.org> | 2008-05-12 23:20:58 +0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-23 23:47:01 +0400 |
| commit | 845279972f1736c3463c9cebd1bad92a0a347176 (patch) | |
| tree | f71598851ca347068940ecce23458cad06120f6d | |
| parent | b5685aede3b7b65e72ddc73b951aa1f70798a614 (diff) | |
| download | linux-845279972f1736c3463c9cebd1bad92a0a347176.tar.xz | |
ftrace: return EOF in trace_pipe on change of tracer
Break out of while loop with EOF when the current_trace changes.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | kernel/trace/trace.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index d141fc98f3a8..2af940433e96 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2253,6 +2253,9 @@ tracing_read_pipe(struct file *filp, char __user *ubuf, if (signal_pending(current)) return -EINTR; + if (iter->trace != current_trace) + return 0; + /* * We block until we read something and tracing is disabled. * We still block if tracing is disabled, but we have never |