From: Li Haifeng <omycle@gmail.com>
Date: Wed, 10 Dec 2014 23:44:47 +0000 (-0800)
Subject: mm/frontswap.c: fix the condition in BUG_ON
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a1ad28973d3d9fe23fa73fbb66fba077a987dd81;p=linux-beck.git

mm/frontswap.c: fix the condition in BUG_ON

The largest index of swap device is MAX_SWAPFILES-1.  So the type should
be less than MAX_SWAPFILES.

Signed-off-by: Haifeng Li <omycle@gmail.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/frontswap.c b/mm/frontswap.c
index f2a3571c6e22..8d82809eb085 100644
--- a/mm/frontswap.c
+++ b/mm/frontswap.c
@@ -182,7 +182,7 @@ void __frontswap_init(unsigned type, unsigned long *map)
 	if (frontswap_ops)
 		frontswap_ops->init(type);
 	else {
-		BUG_ON(type > MAX_SWAPFILES);
+		BUG_ON(type >= MAX_SWAPFILES);
 		set_bit(type, need_init);
 	}
 }