iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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

Browse Source 
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 18:07:47 -05:00
parent 667ed1f7bb
commit 83afb52e47
1 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
mm/gup.c
View File

@ -2524,7 +2524,8 @@ static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr,
unsigned long end, unsigned int flags, unsigned long end, unsigned int flags,
struct page **pages, int *nr) struct page **pages, int *nr)
{ {
struct page *head, *page; struct page *page;
struct folio *folio;
int refs; int refs;
if (!pud_access_permitted(orig, flags & FOLL_WRITE)) if (!pud_access_permitted(orig, flags & FOLL_WRITE))
@ -2540,17 +2541,17 @@ static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr,
page = nth_page(pud_page(orig), (addr & ~PUD_MASK) >> PAGE_SHIFT); page = nth_page(pud_page(orig), (addr & ~PUD_MASK) >> PAGE_SHIFT);
refs = record_subpages(page, addr, end, pages + *nr); refs = record_subpages(page, addr, end, pages + *nr);
head = try_grab_compound_head(pud_page(orig), refs, flags); folio = try_grab_folio(page, refs, flags);
if (!head) if (!folio)
return 0; return 0;
if (unlikely(pud_val(orig) != pud_val(*pudp))) { if (unlikely(pud_val(orig) != pud_val(*pudp))) {
put_compound_head(head, refs, flags); gup_put_folio(folio, refs, flags);
return 0; return 0;
} }
*nr += refs; *nr += refs;
SetPageReferenced(head); folio_set_referenced(folio);
return 1; return 1;
} }