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Date: Wed, 11 Nov 2009 13:47:30 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Roel Kluin <roel.kluin@...il.com>
Cc: LKML <linux-kernel@...r.kernel.org>, ingo <mingo@...e.hu>,
rostedt@...dmis.org, Andy Whitcroft <apw@...dowen.org>
Subject: Re: [PATCH] ftrace: return error instead of 12 bytes read
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?
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