btrfs: combine btrfs_clear_buffer_dirty and clear_extent_buffer_dirty

btrfs_clear_buffer_dirty just does the test_clear_bit() and then calls
clear_extent_buffer_dirty and does the dirty metadata accounting.
Combine this into clear_extent_buffer_dirty and make the result
btrfs_clear_buffer_dirty.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/disk-io.c

@@ -1025,19 +1025,6 @@ struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
 
 }
 
-void btrfs_clear_buffer_dirty(struct extent_buffer *buf)
-{
-	struct btrfs_fs_info *fs_info = buf->fs_info;
-	btrfs_assert_tree_write_locked(buf);
-
-	if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &buf->bflags)) {
-		percpu_counter_add_batch(&fs_info->dirty_metadata_bytes,
-					 -buf->len,
-					 fs_info->dirty_metadata_batch);
-		clear_extent_buffer_dirty(buf);
-	}
-}
-
 static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
 			 u64 objectid)
 {

fs/btrfs/extent_io.c

@@ -4695,12 +4695,21 @@ static void clear_subpage_extent_buffer_dirty(const struct extent_buffer *eb)
 	WARN_ON(atomic_read(&eb->refs) == 0);
 }
 
-void clear_extent_buffer_dirty(const struct extent_buffer *eb)
+void btrfs_clear_buffer_dirty(struct extent_buffer *eb)
 {
+	struct btrfs_fs_info *fs_info = eb->fs_info;
 	int i;
 	int num_pages;
 	struct page *page;
 
+	btrfs_assert_tree_write_locked(eb);
+
+	if (!test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags))
+		return;
+
+	percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, -eb->len,
+				 fs_info->dirty_metadata_batch);
+
 	if (eb->fs_info->nodesize < PAGE_SIZE)
 		return clear_subpage_extent_buffer_dirty(eb);
 

fs/btrfs/extent_io.h

@@ -262,7 +262,6 @@ void extent_buffer_bitmap_set(const struct extent_buffer *eb, unsigned long star
 void extent_buffer_bitmap_clear(const struct extent_buffer *eb,
 				unsigned long start, unsigned long pos,
 				unsigned long len);
-void clear_extent_buffer_dirty(const struct extent_buffer *eb);
 bool set_extent_buffer_dirty(struct extent_buffer *eb);
 void set_extent_buffer_uptodate(struct extent_buffer *eb);
 void clear_extent_buffer_uptodate(struct extent_buffer *eb);
@@ -274,6 +273,7 @@ void extent_clear_unlock_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
 				  u32 bits_to_clear, unsigned long page_ops);
 int extent_invalidate_folio(struct extent_io_tree *tree,
 			    struct folio *folio, size_t offset);
+void btrfs_clear_buffer_dirty(struct extent_buffer *buf);
 
 int btrfs_alloc_page_array(unsigned int nr_pages, struct page **page_array);