16 void flush_dcache_page(struct page *page)  in flush_dcache_page()  argument
20 	if (page == ZERO_PAGE(0))  in flush_dcache_page()
23 	mapping = page_mapping_file(page);  in flush_dcache_page()
25 	if (mapping && !page_mapcount(page))  in flush_dcache_page()
26 		clear_bit(PG_dcache_clean, &page->flags);  in flush_dcache_page()
31 		set_bit(PG_dcache_clean, &page->flags);  in flush_dcache_page()
40 	struct page *page;  in update_mmu_cache()  local
45 	page = pfn_to_page(pfn);  in update_mmu_cache()
46 	if (page == ZERO_PAGE(0))  in update_mmu_cache()
49 	if (!test_and_set_bit(PG_dcache_clean, &page->flags))  in update_mmu_cache()
52 	if (page_mapping_file(page)) {  in update_mmu_cache()
58 void flush_kernel_dcache_page(struct page *page)  in flush_kernel_dcache_page()  argument
62 	mapping = page_mapping_file(page);  in flush_kernel_dcache_page()