[tip:tracing/core] tracing, function tracer: Clean up strstrip() usage

[tip-bot for Ingo Molnar]

Commit-ID:  457dc928f586f3f4b930206965e6db270034e97e
Gitweb:     http://git.kernel.org/tip/457dc928f586f3f4b930206965e6db270034e97e
Author:     Ingo Molnar <mingo@xxxxxxx>
AuthorDate: Mon, 23 Nov 2009 11:03:28 +0100
Committer:  Ingo Molnar <mingo@xxxxxxx>
CommitDate: Mon, 23 Nov 2009 11:04:07 +0100

tracing, function tracer: Clean up strstrip() usage

Clean up strstrip() usage - which also addresses this build warning:

  kernel/trace/ftrace.c: In function 'ftrace_pid_write':
  kernel/trace/ftrace.c:3004: warning: ignoring return value of 'strstrip', declared with attribute warn_unused_result

Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
 kernel/trace/ftrace.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 7f9b51e..1dc101d 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2985,7 +2985,7 @@ static ssize_t
 ftrace_pid_write(struct file *filp, const char __user *ubuf,
 		   size_t cnt, loff_t *ppos)
 {
-	char buf[64];
+	char buf[64], *tmp;
 	long val;
 	int ret;
 
@@ -3001,11 +3001,11 @@ ftrace_pid_write(struct file *filp, const char __user *ubuf,
 	 * Allow "echo > set_ftrace_pid" or "echo -n '' > set_ftrace_pid"
 	 * to clean the filter quietly.
 	 */
-	strstrip(buf);
-	if (strlen(buf) == 0)
+	tmp = strstrip(buf);
+	if (strlen(tmp) == 0)
 		return 1;
 
-	ret = strict_strtol(buf, 10, &val);
+	ret = strict_strtol(tmp, 10, &val);
 	if (ret < 0)
 		return ret;
 
@@ -3391,4 +3391,3 @@ void ftrace_graph_stop(void)
 	ftrace_stop();
 }
 #endif
-
--
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