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authorSteven Rostedt <rostedt@goodmis.org>2008-05-12 15:20:58 -0400
committerThomas Gleixner <tglx@linutronix.de>2008-05-23 15:47:01 -0400
commit845279972f1736c3463c9cebd1bad92a0a347176 (patch)
treef71598851ca347068940ecce23458cad06120f6d /kernel/trace/trace.c
parentb5685aede3b7b65e72ddc73b951aa1f70798a614 (diff)
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>
Diffstat (limited to 'kernel/trace/trace.c')
-rw-r--r--kernel/trace/trace.c3
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,
2253 if (signal_pending(current)) 2253 if (signal_pending(current))
2254 return -EINTR; 2254 return -EINTR;
2255 2255
2256 if (iter->trace != current_trace)
2257 return 0;
2258
2256 /* 2259 /*
2257 * We block until we read something and tracing is disabled. 2260 * We block until we read something and tracing is disabled.
2258 * We still block if tracing is disabled, but we have never 2261 * We still block if tracing is disabled, but we have never