From a1ad28973d3d9fe23fa73fbb66fba077a987dd81 Mon Sep 17 00:00:00 2001
From: Li Haifeng <omycle@gmail.com>
Date: Wed, 10 Dec 2014 15:44:47 -0800
Subject: [PATCH] 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>
---
mm/frontswap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/frontswap.c b/mm/frontswap.c
index f2a3571c6e225..8d82809eb0859 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);
}
}
--
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