btrfs-progs: reduce size of btrfs_path::reada

We use only a few values, reada accessed not in performance critical
contexts.

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

diff --git a/ctree.h b/ctree.h
index 52ddd52..df088d1 100644 (file)
--- a/ctree.h
+++ b/ctree.h
@@ -559,7 +559,7 @@ struct btrfs_path {
        /* The kernel locking sheme is not done in userspace. */
        int locks[BTRFS_MAX_LEVEL];
 #endif
-       int reada;
+       signed char reada;
        /* keep some upper locks as we walk down */
        int lowest_level;