static int iomap_writepage_map_blocks(struct iomap_writepage_ctx *wpc,
		struct writeback_control *wbc, struct folio *folio,
		struct inode *inode, u64 pos, unsigned *count,
		struct list_head *submit_list)
static int iomap_writepage_map_blocks(struct iomap_writepage_ctx *wpc,
		struct writeback_control *wbc, struct folio *folio,
		struct inode *inode, u64 pos, unsigned *count)