linux-kernel - Re: [PATCH] ftrace: return error instead of 12 bytes read

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Date:	Wed, 11 Nov 2009 16:58:12 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Roel Kluin <roel.kluin@...il.com>,
	LKML <linux-kernel@...r.kernel.org>, ingo <mingo@...e.hu>,
	Andy Whitcroft <apw@...dowen.org>
Subject: Re: [PATCH] ftrace: return error instead of 12 bytes read

On Wed, 2009-11-11 at 13:47 -0800, Andrew Morton wrote:
> On Wed, 11 Nov 2009 22:26:35 +0100
> Roel Kluin <roel.kluin@...il.com> wrote:
> 
> > A negative error value is required: now we cannot
> > distinguish ENOMEM from a valid read of 12 bytes.
> > 
> > Signed-off-by: Roel Kluin <roel.kluin@...il.com>
> > ---
> >  kernel/trace/trace.c |    2 +-
> >  1 files changed, 1 insertions(+), 1 deletions(-)
> > 
> > diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> > index b20d3ec..03c7fd5 100644
> > --- a/kernel/trace/trace.c
> > +++ b/kernel/trace/trace.c
> > @@ -3730,7 +3730,7 @@ tracing_stats_read(struct file *filp, char __user *ubuf,
> >  
> >  	s = kmalloc(sizeof(*s), GFP_KERNEL);
> >  	if (!s)
> > -		return ENOMEM;
> > +		return -ENOMEM;
> >  
> >  	trace_seq_init(s);
> >  
> 
> lol, there we go again.
> 
> Andy, can we have a checkpatch rule please?

Acked-by: Steven Rostedt <rostedt@...dmis.org>

-- Steve


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