diff options
Diffstat (limited to 'arch/arm64/mm/pageattr.c')
| -rw-r--r-- | arch/arm64/mm/pageattr.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c index bde08090b838..4175bcb8ccb3 100644 --- a/arch/arm64/mm/pageattr.c +++ b/arch/arm64/mm/pageattr.c @@ -198,6 +198,7 @@ void __kernel_map_pages(struct page *page, int numpages, int enable) bool kernel_page_present(struct page *page) { pgd_t *pgdp; + p4d_t *p4dp; pud_t *pudp, pud; pmd_t *pmdp, pmd; pte_t *ptep; @@ -210,7 +211,11 @@ bool kernel_page_present(struct page *page) if (pgd_none(READ_ONCE(*pgdp))) return false; - pudp = pud_offset(pgdp, addr); + p4dp = p4d_offset(pgdp, addr); + if (p4d_none(READ_ONCE(*p4dp))) + return false; + + pudp = pud_offset(p4dp, addr); pud = READ_ONCE(*pudp); if (pud_none(pud)) return false; |