Commit 32b8fc48 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

mm: Add folio_pgdat(), folio_zone() and folio_zonenum() 



These are just convenience wrappers for callers with folios; pgdat and
zone can be reached from tail pages as well as head pages.  No change
to generated code.

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarZi Yan <ziy@nvidia.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Acked-by: default avatarJeff Layton <jlayton@kernel.org>
Acked-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: default avatarVlastimil Babka <vbabka@suse.cz>
Reviewed-by: default avatarWilliam Kucharski <william.kucharski@oracle.com>
Reviewed-by: default avatarDavid Howells <dhowells@redhat.com>
Acked-by: default avatarMike Rapoport <rppt@linux.ibm.com>
parent 7b230db3

include/linux/mm.h

+15 −0
Original line number Diff line number Diff line
@@ -1145,6 +1145,11 @@ static inline enum zone_type page_zonenum(const struct page *page) 
	return (page->flags >> ZONES_PGSHIFT) & ZONES_MASK;

}



static inline enum zone_type folio_zonenum(const struct folio *folio)

{

	return page_zonenum(&folio->page);

}



#ifdef CONFIG_ZONE_DEVICE

static inline bool is_zone_device_page(const struct page *page)

{
@@ -1560,6 +1565,16 @@ static inline pg_data_t *page_pgdat(const struct page *page) 
	return NODE_DATA(page_to_nid(page));

}



static inline struct zone *folio_zone(const struct folio *folio)

{

	return page_zone(&folio->page);

}



static inline pg_data_t *folio_pgdat(const struct folio *folio)

{

	return page_pgdat(&folio->page);

}



#ifdef SECTION_IN_PAGE_FLAGS

static inline void set_page_section(struct page *page, unsigned long section)

{