linux-kernel - [PATCH] tracing: fix twice trace iterator init

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Message-ID: <CACV3sb+G1YnO6168JhY3dEadmJi58pA5-2cSZT8E0WVHJNFt9Q@mail.gmail.com>
Date:	Fri, 25 Jan 2013 18:20:40 +0800
From:	Jovi Zhang <bookjovi@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>
Subject: [PATCH] tracing: fix twice trace iterator init

>From ac499cd340bf2ba47b3d1dd129a3bb7527c195ae Mon Sep 17 00:00:00 2001
From: Jovi Zhang <bookjovi@...il.com>
Date: Fri, 25 Jan 2013 18:03:07 +0800
Subject: [PATCH] tracing: fix twice trace iterator init

trace iterator is already inited in trace_init_global_iter,
so there don't need to assign again.

Signed-off-by: Jovi Zhang <bookjovi@...il.com>
---
 kernel/trace/trace.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index e512567..8d99728 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5005,6 +5005,7 @@ __ftrace_dump(bool disable_tracing, enum
ftrace_dump_mode oops_dump_mode)
 	if (disable_tracing)
 		ftrace_kill();

+	/* Simulate the iterator */
 	trace_init_global_iter(&iter);

 	for_each_tracing_cpu(cpu) {
@@ -5016,10 +5017,6 @@ __ftrace_dump(bool disable_tracing, enum
ftrace_dump_mode oops_dump_mode)
 	/* don't look at user memory in panic mode */
 	trace_flags &= ~TRACE_ITER_SYM_USEROBJ;

-	/* Simulate the iterator */
-	iter.tr = &global_trace;
-	iter.trace = current_trace;
-
 	switch (oops_dump_mode) {
 	case DUMP_ALL:
 		iter.cpu_file = TRACE_PIPE_ALL_CPU;
-- 
1.7.9.7
--
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