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sys_swapon: simplify error flow in claim_swapfile()

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Since there is no cleanup to do, there is no reason to jump to a label.
Return directly instead.

Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Tested-by: Eric B Munson <emunson@mgebm.net>
Acked-by: Eric B Munson <emunson@mgebm.net>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Cesar Eduardo Barros 2011-03-22 16:33:27 -07:00 committed by Linus Torvalds
parent 4d0e1e1075
commit 87ade72a79
1 changed files with 6 additions and 14 deletions
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20
mm/swapfile.c
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@ -1900,30 +1900,22 @@ static int claim_swapfile(struct swap_info_struct *p, struct inode *inode)
sys_swapon);
if (error < 0) {
p->bdev = NULL;
error = -EINVAL;
goto bad_swap;
return -EINVAL;
}
p->old_block_size = block_size(p->bdev);
error = set_blocksize(p->bdev, PAGE_SIZE);
if (error < 0)
goto bad_swap;
return error;
p->flags |= SWP_BLKDEV;
} else if (S_ISREG(inode->i_mode)) {
p->bdev = inode->i_sb->s_bdev;
mutex_lock(&inode->i_mutex);
if (IS_SWAPFILE(inode)) {
error = -EBUSY;
goto bad_swap;
}
} else {
error = -EINVAL;
goto bad_swap;
}
if (IS_SWAPFILE(inode))
return -EBUSY;
} else
return -EINVAL;
return 0;
bad_swap:
return error;
}
SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)