linux-kernel - [PATCH 3/3] function-graph: Allow writing the same val to set_graph

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Message-ID: <4AEF7FDC.2040200@cn.fujitsu.com>
Date:	Tue, 03 Nov 2009 08:57:00 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/3] function-graph: Allow writing the same val to set_graph_function

 # echo 'do_open' > set_graph_function
 # echo 'do_open' >> set_graph_function
 bash: echo: write error: Invalid argument

Make it valid to write the same value to set_graph_function.

Signed-off-by: Li Zefan <lizf@...fujitsu.com>
---
 kernel/trace/ftrace.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index e0184b7..eaf6a4d 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2549,10 +2549,9 @@ ftrace_set_func(unsigned long *array, int *idx, char *buffer)
 					exists = true;
 					break;
 				}
-			if (!exists) {
+			if (!exists)
 				array[(*idx)++] = rec->ip;
-				found = 1;
-			}
+			found = 1;
 		}
 	} while_for_each_ftrace_rec();
 
-- 
1.6.3
--
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