linux-kernel - [patch] tracing: Remove an unneeded check

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Message-ID: <20120420063145.GA22649@elgon.mountain>
Date:	Fri, 20 Apr 2012 09:31:45 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] tracing: Remove an unneeded check

memcpy() returns a pointer to "bug".  Hopefully, it's not NULL here or
we would already have Oopsed.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index ed7b5d1..c2d5b71 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -629,7 +629,6 @@ ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, size_t cnt)
 static ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt)
 {
 	int len;
-	void *ret;
 
 	if (s->len <= s->readpos)
 		return -EBUSY;
@@ -637,9 +636,7 @@ static ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt)
 	len = s->len - s->readpos;
 	if (cnt > len)
 		cnt = len;
-	ret = memcpy(buf, s->buffer + s->readpos, cnt);
-	if (!ret)
-		return -EFAULT;
+	memcpy(buf, s->buffer + s->readpos, cnt);
 
 	s->readpos += cnt;
 	return cnt;
--
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