btrfs: open code trivial helper btrfs_header_chunk_tree_uuid

The helper btrfs_header_chunk_tree_uuid follows naming convention of
other struct accessors but does something compeletly different. As the
offsetof calculation is clear in the context of extent buffer operations
we can remove it.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index f66c4ea..1cde3f1 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1973,11 +1973,6 @@ static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
        btrfs_set_header_flags(eb, flags);
 }
 
-static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
-{
-       return offsetof(struct btrfs_header, chunk_tree_uuid);
-}
-
 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
 {
        return btrfs_header_level(eb) == 0;

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 2e48265..abd7a61 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3106,7 +3106,8 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
        chunk_root->commit_root = btrfs_root_node(chunk_root);
 
        read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid,
-          btrfs_header_chunk_tree_uuid(chunk_root->node), BTRFS_UUID_SIZE);
+                          offsetof(struct btrfs_header, chunk_tree_uuid),
+                          BTRFS_UUID_SIZE);
 
        ret = btrfs_read_chunk_tree(fs_info);
        if (ret) {