btrfs: convert clear_page_extent_mapped() to take a folio

The old page API is being gradually replaced and converted to use folio
to improve code readability and avoid repeated conversion between page
and folio. Now clear_page_extent_mapped() can deal with a folio
directly, so change its name to clear_folio_extent_mapped().
Signed-off-by: Li Zetao <lizetao1@huawei.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/extent_io.c

@@ -877,18 +877,17 @@ int set_folio_extent_mapped(struct folio *folio)
 	return 0;
 }
 
-void clear_page_extent_mapped(struct page *page)
+void clear_folio_extent_mapped(struct folio *folio)
 {
-	struct folio *folio = page_folio(page);
 	struct btrfs_fs_info *fs_info;
 
-	ASSERT(page->mapping);
+	ASSERT(folio->mapping);
 
 	if (!folio_test_private(folio))
 		return;
 
-	fs_info = page_to_fs_info(page);
-	if (btrfs_is_subpage(fs_info, page->mapping))
+	fs_info = folio_to_fs_info(folio);
+	if (btrfs_is_subpage(fs_info, folio->mapping))
 		return btrfs_detach_subpage(fs_info, folio);
 
 	folio_detach_private(folio);

fs/btrfs/extent_io.h

@@ -249,7 +249,7 @@ int btree_write_cache_pages(struct address_space *mapping,
 void btrfs_readahead(struct readahead_control *rac);
 int set_folio_extent_mapped(struct folio *folio);
 int set_page_extent_mapped(struct page *page);
-void clear_page_extent_mapped(struct page *page);
+void clear_folio_extent_mapped(struct folio *folio);
 
 struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
 					  u64 start, u64 owner_root, int level);

fs/btrfs/inode.c

@@ -7240,7 +7240,7 @@ static bool __btrfs_release_folio(struct folio *folio, gfp_t gfp_flags)
 {
 	if (try_release_extent_mapping(&folio->page, gfp_flags)) {
 		wait_subpage_spinlock(folio);
-		clear_page_extent_mapped(&folio->page);
+		clear_folio_extent_mapped(folio);
 		return true;
 	}
 	return false;
@@ -7438,7 +7438,7 @@ static void btrfs_invalidate_folio(struct folio *folio, size_t offset,
 	btrfs_folio_clear_checked(fs_info, folio, folio_pos(folio), folio_size(folio));
 	if (!inode_evicting)
 		__btrfs_release_folio(folio, GFP_NOFS);
-	clear_page_extent_mapped(&folio->page);
+	clear_folio_extent_mapped(folio);
 }
 
 static int btrfs_truncate(struct btrfs_inode *inode, bool skip_writeback)