Commit 667ed1f7 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

mm/gup: Convert gup_huge_pmd() to use a folio 



Use the new folio-based APIs.

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 09a1626e

mm/gup.c

+6 −5
Original line number Diff line number Diff line
@@ -2489,7 +2489,8 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr, 
			unsigned long end, unsigned int flags,

			struct page **pages, int *nr)

{

	struct page *head, *page;

	struct page *page;

	struct folio *folio;

	int refs;



	if (!pmd_access_permitted(orig, flags & FOLL_WRITE))
@@ -2505,17 +2506,17 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr, 
	page = nth_page(pmd_page(orig), (addr & ~PMD_MASK) >> PAGE_SHIFT);

	refs = record_subpages(page, addr, end, pages + *nr);



	head = try_grab_compound_head(pmd_page(orig), refs, flags);

	if (!head)

	folio = try_grab_folio(page, refs, flags);

	if (!folio)

		return 0;



	if (unlikely(pmd_val(orig) != pmd_val(*pmdp))) {

		put_compound_head(head, refs, flags);

		gup_put_folio(folio, refs, flags);

		return 0;

	}



	*nr += refs;

	SetPageReferenced(head);

	folio_set_referenced(folio);

	return 1;

}