linux

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Matthew Wilcox (Oracle) 32b8fc4865 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>

2021-09-27 09:27:29 -04:00