Btrfs: Make an unplug function that doesn't unplug every spindle
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 5b1514e..e875c7c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -313,13 +313,9 @@
u64 logical = bio->bi_sector << 9;
u64 length = 0;
u64 map_length;
- struct bio_vec *bvec;
- int i;
int ret;
- bio_for_each_segment(bvec, bio, i) {
- length += bvec->bv_len;
- }
+ length = bio->bi_size;
map_tree = &root->fs_info->mapping_tree;
map_length = length;
ret = btrfs_map_block(map_tree, READ, logical,