From: Liu Bo <bo.li.liu@oracle.com>
Date: Sun, 8 Jun 2014 11:04:13 +0000 (+0800)
Subject: Btrfs: use right type to get real comparison
X-Git-Tag: v3.16-rc1~45^2~3
X-Git-Url: https://git.kernelconcepts.de/?a=commitdiff_plain;h=cd857dd6bc2ae9ecea14e75a34e8a8fdc158e307;p=karo-tx-linux.git

Btrfs: use right type to get real comparison

We want to make sure the point is still within the extent item, not to verify
the memory it's pointing to.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
---

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 84d0912eecb2..00f9d9f911ca 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1428,7 +1428,7 @@ static int __get_extent_inline_ref(unsigned long *ptr, struct extent_buffer *eb,
 			*out_eiref = (struct btrfs_extent_inline_ref *)(ei + 1);
 		}
 		*ptr = (unsigned long)*out_eiref;
-		if ((void *)*ptr >= (void *)ei + item_size)
+		if ((unsigned long)(*ptr) >= (unsigned long)ei + item_size)
 			return -ENOENT;
 	}