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ksm: use a folio in replace_page() 

Replace three calls to compound_head() with one.

Link: https://lkml.kernel.org/r/20220902194653.1739778-46-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-09-02 20:46:41 +01:00 committed by Andrew Morton
parent 5fcd079af9
commit b4e6f66e45
1 changed files with 5 additions and 3 deletions

8
mm/ksm.c
View File

@ -1110,6 +1110,7 @@ static int replace_page(struct vm_area_struct *vma, struct page *page,
struct page *kpage, pte_t orig_pte) struct page *kpage, pte_t orig_pte)
{ {
struct mm_struct *mm = vma->vm_mm; struct mm_struct *mm = vma->vm_mm;
struct folio *folio;
pmd_t *pmd; pmd_t *pmd;
pmd_t pmde; pmd_t pmde;
pte_t *ptep; pte_t *ptep;
@ -1178,10 +1179,11 @@ static int replace_page(struct vm_area_struct *vma, struct page *page,
ptep_clear_flush(vma, addr, ptep); ptep_clear_flush(vma, addr, ptep);
set_pte_at_notify(mm, addr, ptep, newpte); set_pte_at_notify(mm, addr, ptep, newpte);
folio = page_folio(page);
page_remove_rmap(page, vma, false); page_remove_rmap(page, vma, false);
if (!page_mapped(page)) if (!folio_mapped(folio))
try_to_free_swap(page); folio_free_swap(folio);
put_page(page); folio_put(folio);
pte_unmap_unlock(ptep, ptl); pte_unmap_unlock(ptep, ptl);
err = 0; err = 0;