Commit bf6bd276 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

mm: Add folio_pfn() 



This is the folio equivalent of page_to_pfn().

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: default avatarMike Rapoport <rppt@linux.ibm.com>
Reviewed-by: default avatarDavid Howells <dhowells@redhat.com>
Acked-by: default avatarVlastimil Babka <vbabka@suse.cz>
parent c5ce619a

include/linux/mm.h

+14 −0
Original line number Diff line number Diff line
@@ -1624,6 +1624,20 @@ static inline unsigned long page_to_section(const struct page *page) 
}

#endif



/**

 * folio_pfn - Return the Page Frame Number of a folio.

 * @folio: The folio.

 *

 * A folio may contain multiple pages.  The pages have consecutive

 * Page Frame Numbers.

 *

 * Return: The Page Frame Number of the first page in the folio.

 */

static inline unsigned long folio_pfn(struct folio *folio)

{

	return page_to_pfn(&folio->page);

}



/* MIGRATE_CMA and ZONE_MOVABLE do not allow pin pages */

#ifdef CONFIG_MIGRATION

static inline bool is_pinnable_page(struct page *page)