SLUB: fix behavior if the text output of list_locations overflows PAGE_SIZE

[linux.git] / mm / hugetlb.c

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index eb7180db303326f73f7e099f84e2557e84cc87b1..a45d1f0691cecb63e088d02fb3ff287f025e4d78 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -326,9 +326,10 @@ static void set_huge_ptep_writable(struct vm_area_struct *vma,
        pte_t entry;
 
        entry = pte_mkwrite(pte_mkdirty(*ptep));
-       ptep_set_access_flags(vma, address, ptep, entry, 1);
-       update_mmu_cache(vma, address, entry);
-       lazy_mmu_prot_update(entry);
+       if (ptep_set_access_flags(vma, address, ptep, entry, 1)) {
+               update_mmu_cache(vma, address, entry);
+               lazy_mmu_prot_update(entry);
+       }
 }