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

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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>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-01-18 07:40:36 -05:00
parent 7b230db3b8
commit 32b8fc4865
1 changed files with 15 additions and 0 deletions
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15
include/linux/mm.h
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@ -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)
{