[PATCH 3/3] btrfs: using enum to replace macro

[Chengguang Xu]

using enum to replace macro definition for extent
types.

Signed-off-by: Chengguang Xu <cgxu...@mykernel.net>
---
 fs/btrfs/tree-checker.c         |  4 ++--
 include/uapi/linux/btrfs_tree.h | 10 ++++++----
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 2d91c34bbf63..9b0c5fdbe04e 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -156,11 +156,11 @@ static int check_extent_data_item(struct extent_buffer 
*leaf,
 
        fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
 
-       if (btrfs_file_extent_type(leaf, fi) > BTRFS_FILE_EXTENT_TYPES) {
+       if (btrfs_file_extent_type(leaf, fi) >= BTRFS_FILE_EXTENT_TYPES) {
                file_extent_err(leaf, slot,
                "invalid type for file extent, have %u expect range [0, %u]",
                        btrfs_file_extent_type(leaf, fi),
-                       BTRFS_FILE_EXTENT_TYPES);
+                       BTRFS_FILE_EXTENT_TYPES - 1);
                return -EUCLEAN;
        }
 
diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h
index b65c7ee75bc7..34bd09ffc71d 100644
--- a/include/uapi/linux/btrfs_tree.h
+++ b/include/uapi/linux/btrfs_tree.h
@@ -737,10 +737,12 @@ struct btrfs_balance_item {
        __le64 unused[4];
 } __attribute__ ((__packed__));
 
-#define BTRFS_FILE_EXTENT_INLINE 0
-#define BTRFS_FILE_EXTENT_REG 1
-#define BTRFS_FILE_EXTENT_PREALLOC 2
-#define BTRFS_FILE_EXTENT_TYPES        2
+enum {
+       BTRFS_FILE_EXTENT_INLINE,
+       BTRFS_FILE_EXTENT_REG,
+       BTRFS_FILE_EXTENT_PREALLOC,
+       BTRFS_FILE_EXTENT_TYPES
+};
 
 struct btrfs_file_extent_item {
        /*
-- 
2.21.0