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-rw-r--r--mm/msync.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/msync.c b/mm/msync.c
index 090f426..d0f5a1b 100644
--- a/mm/msync.c
+++ b/mm/msync.c
@@ -34,6 +34,8 @@ static void sync_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
if (!pte_present(*pte))
continue;
+ if (!pte_maybe_dirty(*pte))
+ continue;
pfn = pte_pfn(*pte);
if (!pfn_valid(pfn))
continue;
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