btrfs: use smaller type for btrfs_path reada
The possible values for reada are all positive and bounded, we can later
save some bytes by storing it in u8.
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index a1cf4c8..e5f9b96 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -596,7 +596,7 @@
int slots[BTRFS_MAX_LEVEL];
/* if there is real range locking, this locks field will change */
int locks[BTRFS_MAX_LEVEL];
- int reada;
+ u8 reada;
/* keep some upper locks as we walk down */
int lowest_level;
