Commit 3d11b225 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

mm: Add folio_pincount_ptr() 



This is the folio equivalent of compound_pincount_ptr().

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJohn Hubbard <jhubbard@nvidia.com>
Reviewed-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Reviewed-by: default avatarWilliam Kucharski <william.kucharski@oracle.com>
parent 5232c63f

include/linux/mm.h

+5 −0
Original line number Diff line number Diff line
@@ -1544,6 +1544,11 @@ static inline unsigned long folio_pfn(struct folio *folio) 
	return page_to_pfn(&folio->page);

}



static inline atomic_t *folio_pincount_ptr(struct folio *folio)

{

	return &folio_page(folio, 1)->compound_pincount;

}



/* MIGRATE_CMA and ZONE_MOVABLE do not allow pin pages */

#ifdef CONFIG_MIGRATION

static inline bool is_pinnable_page(struct page *page)