btrfs-progs: Use symbolic names for read ahead behavior

Presently btrfs-progs haven't pulled the enum defining the symbolic
names of read ahead constants. This commit adds the enum and
simultaneously converts all usages to respective symbolic name.
No functional change, just making the code human readable.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/volumes.c b/volumes.c
index ad3016dc..9379d2f6 100644
--- a/volumes.c
+++ b/volumes.c
@@ -420,7 +420,7 @@ static int find_free_dev_extent_start(struct btrfs_device *device,
 		goto out;
 	}
 
-	path->reada = 2;
+	path->reada = READA_FORWARD;
 
 	key.objectid = device->devid;
 	key.offset = search_start;
@@ -846,7 +846,7 @@ static int btrfs_device_avail_bytes(struct btrfs_trans_handle *trans,
 	key.offset = root->fs_info->alloc_start;
 	key.type = BTRFS_DEV_EXTENT_KEY;
 
-	path->reada = 2;
+	path->reada = READA_FORWARD;
 	ret = btrfs_search_slot(trans, root, &key, path, 0, 0);
 	if (ret < 0)
 		goto error;