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

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Use the new folio-based APIs.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-12-22 16:57:23 -05:00
parent 09a1626eff
commit 667ed1f7bb
1 changed files with 6 additions and 5 deletions
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11
mm/gup.c
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@ -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;
}