linux-kernel - [tip:perf/urgent] ftrace: Clear bits properly in reset_iter

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Message-ID: <tip-70f77b3f7ec010ff9624c1f2e39a81babc9e2429@git.kernel.org>
Date:	Sun, 9 Dec 2012 03:30:45 -0800
From:	tip-bot for Dan Carpenter <dan.carpenter@...cle.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	rostedt@...dmis.org, tglx@...utronix.de, dan.carpenter@...cle.com
Subject: [tip:perf/urgent] ftrace: Clear bits properly in reset_iter_read(
 )

Commit-ID:  70f77b3f7ec010ff9624c1f2e39a81babc9e2429
Gitweb:     http://git.kernel.org/tip/70f77b3f7ec010ff9624c1f2e39a81babc9e2429
Author:     Dan Carpenter <dan.carpenter@...cle.com>
AuthorDate: Sat, 9 Jun 2012 19:10:27 +0300
Committer:  Steven Rostedt <rostedt@...dmis.org>
CommitDate: Thu, 15 Nov 2012 16:10:17 -0500

ftrace: Clear bits properly in reset_iter_read()

There is a typo here where '&' is used instead of '|' and it turns the
statement into a noop.  The original code is equivalent to:

	iter->flags &= ~((1 << 2) & (1 << 4));

Link: http://lkml.kernel.org/r/20120609161027.GD6488@elgon.mountain

Cc: stable@...r.kernel.org # all of them
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
 kernel/trace/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 9dcf15d..51b7159 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2437,7 +2437,7 @@ static void reset_iter_read(struct ftrace_iterator *iter)
 {
 	iter->pos = 0;
 	iter->func_pos = 0;
-	iter->flags &= ~(FTRACE_ITER_PRINTALL & FTRACE_ITER_HASH);
+	iter->flags &= ~(FTRACE_ITER_PRINTALL | FTRACE_ITER_HASH);
 }
 
 static void *t_start(struct seq_file *m, loff_t *pos)
--
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