btrfs: switch BTRFS_ROOT_* to enums

We can use simple enum for values that are not part of on-disk format:
root tree flags.

Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 99f8fff..41d0560 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1180,22 +1180,23 @@ struct btrfs_subvolume_writers {
 /*
  * The state of btrfs root
  */
-/*
- * btrfs_record_root_in_trans is a multi-step process,
- * and it can race with the balancing code.   But the
- * race is very small, and only the first time the root
- * is added to each transaction.  So IN_TRANS_SETUP
- * is used to tell us when more checks are required
- */
-#define BTRFS_ROOT_IN_TRANS_SETUP      0
-#define BTRFS_ROOT_REF_COWS            1
-#define BTRFS_ROOT_TRACK_DIRTY         2
-#define BTRFS_ROOT_IN_RADIX            3
-#define BTRFS_ROOT_ORPHAN_ITEM_INSERTED        4
-#define BTRFS_ROOT_DEFRAG_RUNNING      5
-#define BTRFS_ROOT_FORCE_COW           6
-#define BTRFS_ROOT_MULTI_LOG_TASKS     7
-#define BTRFS_ROOT_DIRTY               8
+enum {
+       /*
+        * btrfs_record_root_in_trans is a multi-step process, and it can race
+        * with the balancing code.   But the race is very small, and only the
+        * first time the root is added to each transaction.  So IN_TRANS_SETUP
+        * is used to tell us when more checks are required
+        */
+       BTRFS_ROOT_IN_TRANS_SETUP,
+       BTRFS_ROOT_REF_COWS,
+       BTRFS_ROOT_TRACK_DIRTY,
+       BTRFS_ROOT_IN_RADIX,
+       BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
+       BTRFS_ROOT_DEFRAG_RUNNING,
+       BTRFS_ROOT_FORCE_COW,
+       BTRFS_ROOT_MULTI_LOG_TASKS,
+       BTRFS_ROOT_DIRTY,
+};
 
 /*
  * in ram representation of the tree.  extent_root is used for all allocations