linux-kernel - [PATCH 06/13] function-graph: Allow writing the same val to set_graph

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Date:	Sun, 13 Dec 2009 14:08:07 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Li Zefan <lizf@...fujitsu.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	"K.Prasad" <prasad@...ux.vnet.ibm.com>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Jason Baron <jbaron@...hat.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: [PATCH 06/13] function-graph: Allow writing the same val to set_graph_function

From: Li Zefan <lizf@...fujitsu.com>

# 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,
which is consistent with set_ftrace_filter interface.

Signed-off-by: Li Zefan <lizf@...fujitsu.com>
Acked-by: Steven Rostedt <rostedt@...dmis.org>
LKML-reference: <4B1DC4E1.1060303@...fujitsu.com>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.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 ff8aecd..7968762 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2552,10 +2552,9 @@ 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();
 
-- 
1.6.2.3

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