summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/vm86_32.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/vm86_32.c')
-rw-r--r--arch/x86/kernel/vm86_32.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c
index 23ee89ce59a9..7924a5356c8a 100644
--- a/arch/x86/kernel/vm86_32.c
+++ b/arch/x86/kernel/vm86_32.c
@@ -164,6 +164,7 @@ static void mark_screen_rdonly(struct mm_struct *mm)
struct vm_area_struct *vma;
spinlock_t *ptl;
pgd_t *pgd;
+ p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
@@ -173,7 +174,10 @@ static void mark_screen_rdonly(struct mm_struct *mm)
pgd = pgd_offset(mm, 0xA0000);
if (pgd_none_or_clear_bad(pgd))
goto out;
- pud = pud_offset(pgd, 0xA0000);
+ p4d = p4d_offset(pgd, 0xA0000);
+ if (p4d_none_or_clear_bad(p4d))
+ goto out;
+ pud = pud_offset(p4d, 0xA0000);
if (pud_none_or_clear_bad(pud))
goto out;
pmd = pmd_offset(pud, 0xA0000);
@@ -193,7 +197,7 @@ static void mark_screen_rdonly(struct mm_struct *mm)
pte_unmap_unlock(pte, ptl);
out:
up_write(&mm->mmap_sem);
- flush_tlb();
+ flush_tlb_mm_range(mm, 0xA0000, 0xA0000 + 32*PAGE_SIZE, 0UL);
}