From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with ESMTP id E6A308D003D for ; Sat, 12 Feb 2011 13:49:47 -0500 (EST) Received: from unknown (HELO localhost.localdomain) (zcncxNmDysja2tXBptWToZWJlF6Wp6IuYnI=@[200.157.204.20]) (envelope-sender ) by smtp-01.mandic.com.br (qmail-ldap-1.03) with AES256-SHA encrypted SMTP for ; 12 Feb 2011 18:49:44 -0000 From: Cesar Eduardo Barros Subject: [PATCH 12/24] sys_swapon: use a single error label Date: Sat, 12 Feb 2011 16:49:13 -0200 Message-Id: <1297536565-8059-12-git-send-email-cesarb@cesarb.net> In-Reply-To: <4D56D5F9.8000609@cesarb.net> References: <4D56D5F9.8000609@cesarb.net> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Cesar Eduardo Barros sys_swapon currently has two error labels, bad_swap and bad_swap_2. bad_swap does the same as bad_swap_2 plus destroy_swap_extents() and swap_cgroup_swapoff(); both are noops in the places where bad_swap_2 is jumped to. With a single extra test for inode (matching the one in the S_ISREG case below), all the error paths in the function can go to bad_swap. Signed-off-by: Cesar Eduardo Barros --- mm/swapfile.c | 7 +++---- 1 files changed, 3 insertions(+), 4 deletions(-) diff --git a/mm/swapfile.c b/mm/swapfile.c index f122f4a..57eff7e 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -1918,13 +1918,13 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) if (IS_ERR(name)) { error = PTR_ERR(name); name = NULL; - goto bad_swap_2; + goto bad_swap; } swap_file = filp_open(name, O_RDWR|O_LARGEFILE, 0); if (IS_ERR(swap_file)) { error = PTR_ERR(swap_file); swap_file = NULL; - goto bad_swap_2; + goto bad_swap; } p->swap_file = swap_file; @@ -2141,13 +2141,12 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) error = 0; goto out; bad_swap: - if (S_ISBLK(inode->i_mode) && p->bdev) { + if (inode && S_ISBLK(inode->i_mode) && p->bdev) { set_blocksize(p->bdev, p->old_block_size); blkdev_put(p->bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL); } destroy_swap_extents(p); swap_cgroup_swapoff(p->type); -bad_swap_2: spin_lock(&swap_lock); p->swap_file = NULL; p->flags = 0; -- 1.7.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org