linux-kernel - [tip:tracing/urgent] ftrace: Fix the output of profile

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Message-ID: <tip-0296e4254f3318e0dcad9706fa1daf8e5addc1e9@git.kernel.org>
Date:	Fri, 26 Jun 2009 07:27:53 GMT
From:	tip-bot for Li Zefan <lizf@...fujitsu.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	fweisbec@...il.com, rostedt@...dmis.org, lizf@...fujitsu.com,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:tracing/urgent] ftrace: Fix the output of profile

Commit-ID:  0296e4254f3318e0dcad9706fa1daf8e5addc1e9
Gitweb:     http://git.kernel.org/tip/0296e4254f3318e0dcad9706fa1daf8e5addc1e9
Author:     Li Zefan <lizf@...fujitsu.com>
AuthorDate: Fri, 26 Jun 2009 11:15:37 +0800
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Fri, 26 Jun 2009 09:25:42 +0200

ftrace: Fix the output of profile

The first entry of the ftrace profile was always skipped when
reading trace_stat/functionX.

Signed-off-by: Li Zefan <lizf@...fujitsu.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
LKML-Reference: <4A443D59.4080307@...fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 kernel/trace/ftrace.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 71a52c1..f3716bf 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -291,7 +291,9 @@ function_stat_next(void *v, int idx)
 	pg = (struct ftrace_profile_page *)((unsigned long)rec & PAGE_MASK);
 
  again:
-	rec++;
+	if (idx != 0)
+		rec++;
+
 	if ((void *)rec >= (void *)&pg->records[pg->index]) {
 		pg = pg->next;
 		if (!pg)
--
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