__flush_pages_to_ram
#define flush_dcache_page(page) __flush_pages_to_ram(page_address(page), 1)
__flush_pages_to_ram(folio_address(folio), folio_nr_pages(folio))
__flush_pages_to_ram(page_address(page), nr)
__flush_pages_to_ram(page, 1);