From: Matthew Wilcox (Oracle) <willy@infradead.org>
Date: Mon, 18 Jan 2021 12:40:36 +0000 (-0500)
Subject: mm: Add folio_pgdat(), folio_zone() and folio_zonenum()
X-Git-Tag: v6.6.17~9013^2~87
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=32b8fc486524044f2643c5d3340fa436b761ba71;p=platform%2Fkernel%2Flinux-rpi.git

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: 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>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
---

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 9057b84..3fc524f 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);
+}
+
 #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)
 {