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

There should be little to no effect from this patch; just removing
uses of some old 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 16:38:30 -05:00
parent b0496fe4ef
commit 09a1626eff
1 changed files with 7 additions and 7 deletions
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14
mm/gup.c
View File

@ -2425,7 +2425,8 @@ static int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
struct page **pages, int *nr)
{
unsigned long pte_end;
struct page *head, *page;
struct page *page;
struct folio *folio;
pte_t pte;
int refs;
@ -2441,21 +2442,20 @@ static int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
/* hugepages are never "special" */
VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
head = pte_page(pte);
page = nth_page(head, (addr & (sz - 1)) >> PAGE_SHIFT);
page = nth_page(pte_page(pte), (addr & (sz - 1)) >> PAGE_SHIFT);
refs = record_subpages(page, addr, end, pages + *nr);
head = try_grab_compound_head(head, refs, flags);
if (!head)
folio = try_grab_folio(page, refs, flags);
if (!folio)
return 0;
if (unlikely(pte_val(pte) != pte_val(*ptep))) {
put_compound_head(head, refs, flags);
gup_put_folio(folio, refs, flags);
return 0;
}
*nr += refs;
SetPageReferenced(head);
folio_set_referenced(folio);
return 1;
}