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| author | Ingo Molnar <mingo@kernel.org> | 2017-03-16 09:50:50 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-03-16 09:50:50 +0100 |
| commit | 2b95bd7d58d368fe5dcbe6f4e494847ea082d89d (patch) | |
| tree | 48c38d792f31f2fe10b26b03bdf1b10a82ca03a4 /mm/rmap.c | |
| parent | ffa86c2f1a8862cf58c873f6f14d4b2c3250fb48 (diff) | |
| parent | 69eea5a4ab9c705496e912b55a9d312325de19e6 (diff) | |
| download | linux-2b95bd7d58d368fe5dcbe6f4e494847ea082d89d.tar.gz linux-2b95bd7d58d368fe5dcbe6f4e494847ea082d89d.tar.xz | |
Merge branch 'linus' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm/rmap.c')
| -rw-r--r-- | mm/rmap.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 2da487d6cea8..49ed681ccc7b 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -684,6 +684,7 @@ unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma) pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address) { pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd = NULL; pmd_t pmde; @@ -692,7 +693,11 @@ pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address) if (!pgd_present(*pgd)) goto out; - pud = pud_offset(pgd, address); + p4d = p4d_offset(pgd, address); + if (!p4d_present(*p4d)) + goto out; + + pud = pud_offset(p4d, address); if (!pud_present(*pud)) goto out; @@ -1316,12 +1321,6 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma, } while (page_vma_mapped_walk(&pvmw)) { - subpage = page - page_to_pfn(page) + pte_pfn(*pvmw.pte); - address = pvmw.address; - - /* Unexpected PMD-mapped THP? */ - VM_BUG_ON_PAGE(!pvmw.pte, page); - /* * If the page is mlock()d, we cannot swap it out. * If it's recently referenced (perhaps page_referenced @@ -1345,6 +1344,13 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma, continue; } + /* Unexpected PMD-mapped THP? */ + VM_BUG_ON_PAGE(!pvmw.pte, page); + + subpage = page - page_to_pfn(page) + pte_pfn(*pvmw.pte); + address = pvmw.address; + + if (!(flags & TTU_IGNORE_ACCESS)) { if (ptep_clear_flush_young_notify(vma, address, pvmw.pte)) { |