sys_swapon: simplify error flow in alloc_swap_info()

Since there is no cleanup to do, there is no reason to jump to a label.
Return directly instead.
Signed-off-by: NCesar Eduardo Barros <cesarb@cesarb.net>
Tested-by: NEric B Munson <emunson@mgebm.net>
Acked-by: NEric B Munson <emunson@mgebm.net>
Reviewed-by: NPekka Enberg <penberg@kernel.org>
Reviewed-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

mm/swapfile.c

@@ -1848,7 +1848,6 @@ static struct swap_info_struct *alloc_swap_info(void)
 {
 	struct swap_info_struct *p;
 	unsigned int type;
-	int error;
 
 	p = kzalloc(sizeof(*p), GFP_KERNEL);
 	if (!p)
@@ -1859,11 +1858,10 @@ static struct swap_info_struct *alloc_swap_info(void)
 		if (!(swap_info[type]->flags & SWP_USED))
 			break;
 	}
-	error = -EPERM;
 	if (type >= MAX_SWAPFILES) {
 		spin_unlock(&swap_lock);
 		kfree(p);
-		goto out;
+		return ERR_PTR(-EPERM);
 	}
 	if (type >= nr_swapfiles) {
 		p->type = type;
@@ -1889,9 +1887,6 @@ static struct swap_info_struct *alloc_swap_info(void)
 	spin_unlock(&swap_lock);
 
 	return p;
-
-out:
-	return ERR_PTR(error);
 }
 
 SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)