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

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Date:	Wed, 11 Nov 2009 22:26:35 +0100
From:	Roel Kluin <roel.kluin@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, ingo <mingo@...e.hu>,
	rostedt@...dmis.org
Subject: [PATCH] ftrace: return error instead of 12 bytes read

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);
 
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