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authorChris Mason <chris.mason@oracle.com>2008-10-03 16:31:08 -0400
committerChris Mason <chris.mason@oracle.com>2008-10-03 16:31:08 -0400
commita62b940160d8125016e85046e68ae621c99e751f (patch)
treec26ebe1ccf229f829513e1fc85c8110928187e13 /fs/btrfs/volumes.c
parent30c43e2444c16afe3b2130f40ad273541bf3dc36 (diff)
downloadop-kernel-dev-a62b940160d8125016e85046e68ae621c99e751f.zip
op-kernel-dev-a62b940160d8125016e85046e68ae621c99e751f.tar.gz
Btrfs: cast bio->bi_sector to a u64 before shifting
On 32 bit machines without CONFIG_LBD, the bi_sector field is only 32 bits. Btrfs needs to cast it before shifting up, or we end up doing IO into the wrong place. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
-rw-r--r--fs/btrfs/volumes.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index f63cf76..2eed7f9 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2187,7 +2187,7 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
struct btrfs_mapping_tree *map_tree;
struct btrfs_device *dev;
struct bio *first_bio = bio;
- u64 logical = bio->bi_sector << 9;
+ u64 logical = (u64)bio->bi_sector << 9;
u64 length = 0;
u64 map_length;
struct btrfs_multi_bio *multi = NULL;
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