linux-kernel - [PATCH 1/1] kernel/nsproxy.c: Improving a snippet of code.

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Message-Id: <1361989929-1145-1-git-send-email-raphael.scarv@gmail.com>
Date:	Wed, 27 Feb 2013 15:32:09 -0300
From:	"Raphael S.Carvalho" <raphael.scarv@...il.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	"David S. Miller" <davem@...emloft.net>,
	"Serge E. Hallyn" <serge@...lyn.com>
Cc:	linux-kernel@...r.kernel.org,
	"Raphael S.Carvalho" <raphael.scarv@...il.com>
Subject: [PATCH 1/1] kernel/nsproxy.c: Improving a snippet of code.

It seems GCC generates a better code in that way, so I changed that statement.
Btw, they have the same semantic, so I'm sending this patch due to performance issues.

Signed-off-by: Raphael S.Carvalho <raphael.scarv@...il.com>
---
 kernel/nsproxy.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index 78e2ecb..21da3d1 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -148,7 +148,8 @@ int copy_namespaces(unsigned long flags, struct task_struct *tsk)
 	 * means share undolist with parent, so we must forbid using
 	 * it along with CLONE_NEWIPC.
 	 */
-	if ((flags & CLONE_NEWIPC) && (flags & CLONE_SYSVSEM)) {
+	if ((flags & (CLONE_NEWIPC | CLONE_SYSVSEM)) ==
+		(CLONE_NEWIPC | CLONE_SYSVSEM)) {
 		err = -EINVAL;
 		goto out;
 	}
-- 
1.7.2.5

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