linux-kernel - [PATCH] tiny mq

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Message-Id: <200805031928.m43JSjRC001739@devserv.devel.redhat.com>
Date:	Sat, 3 May 2008 15:28:45 -0400
From:	Ulrich Drepper <drepper@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, torvalds@...ux-foundation.org
Subject: [PATCH] tiny mq_open optimization

A very small cleanup for mq_open.  We do not have to call set_close_on_exit
if we create the file descriptor right away with the flag set.  We have a
function for this now.  The resulting code is smaller and a tiny bit faster.


Signed-off-by: Ulrich Drepper <drepper@...hat.com>

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 94fd3b0..b3b69fd 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -673,7 +673,7 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
 	if (IS_ERR(name = getname(u_name)))
 		return PTR_ERR(name);
 
-	fd = get_unused_fd();
+	fd = get_unused_fd_flags(O_CLOEXEC);
 	if (fd < 0)
 		goto out_putname;
 
@@ -709,7 +709,6 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
 		goto out_putfd;
 	}
 
-	set_close_on_exec(fd, 1);
 	fd_install(fd, filp);
 	goto out_upsem;
 
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