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authorChristoph Hellwig <hch@lst.de>2009-10-14 13:24:59 (GMT)
committerChris Mason <chris.mason@oracle.com>2009-10-14 14:32:49 (GMT)
commit0634857488ec6e28fa22920cd0bee3c2ac07ccfd (patch)
tree6cfa348aea76f39b658d3a36ab51807a4ac7bcf7
parente244a0aeb6a599c19a7c802cda6e2d67c847b154 (diff)
downloadlinux-0634857488ec6e28fa22920cd0bee3c2ac07ccfd.tar.xz
Btrfs: enable discard support
The discard support code in btrfs currently is guarded by ifdefs for BIO_RW_DISCARD, which is never defines as it's the name of an enum memeber. Just remove the useless ifdefs to actually enable the code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
-rw-r--r--fs/btrfs/extent-tree.c6
1 files changed, 0 insertions, 6 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index bf7782f..d4a3528 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1568,18 +1568,15 @@ static int remove_extent_backref(struct btrfs_trans_handle *trans,
return ret;
}
-#ifdef BIO_RW_DISCARD
static void btrfs_issue_discard(struct block_device *bdev,
u64 start, u64 len)
{
blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL);
}
-#endif
static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
u64 num_bytes)
{
-#ifdef BIO_RW_DISCARD
int ret;
u64 map_length = num_bytes;
struct btrfs_multi_bio *multi = NULL;
@@ -1606,9 +1603,6 @@ static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
}
return ret;
-#else
- return 0;
-#endif
}
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,