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Diffstat (limited to 'mm/userfaultfd.c')
-rw-r--r--mm/userfaultfd.c18
1 files changed, 2 insertions, 16 deletions
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c
index 0499907b6f1a..f8d31b82aceb 100644
--- a/mm/userfaultfd.c
+++ b/mm/userfaultfd.c
@@ -74,24 +74,10 @@ int mfill_atomic_install_pte(struct mm_struct *dst_mm, pmd_t *dst_pmd,
_dst_pte = pte_mkdirty(_dst_pte);
if (page_in_cache && !vm_shared)
writable = false;
-
- /*
- * Always mark a PTE as write-protected when needed, regardless of
- * VM_WRITE, which the user might change.
- */
- if (wp_copy) {
- _dst_pte = pte_mkuffd_wp(_dst_pte);
- writable = false;
- }
-
if (writable)
_dst_pte = pte_mkwrite(_dst_pte);
- else
- /*
- * We need this to make sure write bit removed; as mk_pte()
- * could return a pte with write bit set.
- */
- _dst_pte = pte_wrprotect(_dst_pte);
+ if (wp_copy)
+ _dst_pte = pte_mkuffd_wp(_dst_pte);
dst_pte = pte_offset_map_lock(dst_mm, dst_pmd, dst_addr, &ptl);