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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-20 03:40:09 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-20 03:40:09 -0400 |
| commit | 9d5272f5e36155bcead69417fd12e98624e7faef (patch) | |
| tree | 770af81c03932ad4e508a12cca6f83fbb3527689 /mm/hugetlb.c | |
| parent | febd668d375caf13a7fcd93b3498366854de854a (diff) | |
| parent | 3a7c8fafd1b42adea229fd204132f6a2fb3cd2d9 (diff) | |
Merge tag 'noinstr-x86-kvm-2020-05-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into HEAD
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index cd459155d28a..bcabbe02192b 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -5365,8 +5365,8 @@ pte_t *huge_pte_offset(struct mm_struct *mm, { pgd_t *pgd; p4d_t *p4d; - pud_t *pud; - pmd_t *pmd; + pud_t *pud, pud_entry; + pmd_t *pmd, pmd_entry; pgd = pgd_offset(mm, addr); if (!pgd_present(*pgd)) @@ -5376,17 +5376,19 @@ pte_t *huge_pte_offset(struct mm_struct *mm, return NULL; pud = pud_offset(p4d, addr); - if (sz != PUD_SIZE && pud_none(*pud)) + pud_entry = READ_ONCE(*pud); + if (sz != PUD_SIZE && pud_none(pud_entry)) return NULL; /* hugepage or swap? */ - if (pud_huge(*pud) || !pud_present(*pud)) + if (pud_huge(pud_entry) || !pud_present(pud_entry)) return (pte_t *)pud; pmd = pmd_offset(pud, addr); - if (sz != PMD_SIZE && pmd_none(*pmd)) + pmd_entry = READ_ONCE(*pmd); + if (sz != PMD_SIZE && pmd_none(pmd_entry)) return NULL; /* hugepage or swap? */ - if (pmd_huge(*pmd) || !pmd_present(*pmd)) + if (pmd_huge(pmd_entry) || !pmd_present(pmd_entry)) return (pte_t *)pmd; return NULL; |