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[v12,03/33] mm: Add folio_pgdat(), folio_zone() and folio_zonenum()

Message ID 20210622114118.3388190-4-willy@infradead.org (mailing list archive)
State New
Headers show
Series Memory folios | expand

Commit Message

Matthew Wilcox June 22, 2021, 11:40 a.m. UTC
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: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Reviewed-by: David Howells <dhowells@redhat.com>
 include/linux/mm.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
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diff --git a/include/linux/mm.h b/include/linux/mm.h
index cba7bc223a9b..f0025bd2c2ad 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -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);
 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);
 static inline void set_page_section(struct page *page, unsigned long section)