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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
	Ingo Molnar <mingo@redhat.com>,
	linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] ftrace: clear bits properly in reset_iter_read()
Date: Sat, 09 Jun 2012 16:10:27 +0000	[thread overview]
Message-ID: <20120609161027.GD6488@elgon.mountain> (raw)

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));

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
This is a static checker fix and I'm not super familiar with ftrace.
Please review carefully.

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index a008663..97da2dc 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2358,7 +2358,7 @@ 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)

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
	Ingo Molnar <mingo@redhat.com>,
	linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] ftrace: clear bits properly in reset_iter_read()
Date: Sat, 9 Jun 2012 19:10:27 +0300	[thread overview]
Message-ID: <20120609161027.GD6488@elgon.mountain> (raw)

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));

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
This is a static checker fix and I'm not super familiar with ftrace.
Please review carefully.

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index a008663..97da2dc 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2358,7 +2358,7 @@ 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)

             reply	other threads:[~2012-06-09 16:10 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-09 16:10 Dan Carpenter [this message]
2012-06-09 16:10 ` [patch] ftrace: clear bits properly in reset_iter_read() Dan Carpenter
2012-06-09 16:57 ` Steven Rostedt
2012-06-09 16:57   ` Steven Rostedt
2012-11-15 21:05   ` Steven Rostedt
2012-11-15 21:05     ` Steven Rostedt
2012-12-09 11:30 ` [tip:perf/urgent] ftrace: Clear bits properly in reset_iter_read( ) tip-bot for Dan Carpenter

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