linux-kernel - Re: [PATCH][GIT PULL] ftrace: Clear bits properly in reset_iter

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Date:	Thu, 29 Nov 2012 22:10:42 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	stable <stable@...r.kernel.org>,
	Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH][GIT PULL] ftrace: Clear bits properly in
 reset_iter_read()

On Fri, 2012-11-16 at 08:22 -0500, Steven Rostedt wrote:
> Ingo,

Ping?

-- Steve

> 
> Please pull the latest tip/perf/urgent tree, which can be found at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
> tip/perf/urgent
> 
> Head SHA1: 70f77b3f7ec010ff9624c1f2e39a81babc9e2429
> 
> 
> Dan Carpenter (1):
>       ftrace: Clear bits properly in reset_iter_read()
> 
> ----
>  kernel/trace/ftrace.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> ---------------------------
> commit 70f77b3f7ec010ff9624c1f2e39a81babc9e2429
> Author: Dan Carpenter <dan.carpenter@...cle.com>
> Date:   Sat Jun 9 19:10:27 2012 +0300
> 
>     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>
> 
> 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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