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-rw-r--r--arch/powerpc/mm/hugetlbpage-hash64.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/mm/hugetlbpage-hash64.c b/arch/powerpc/mm/hugetlbpage-hash64.c
index b320f5097a06..2e6a8f9345d3 100644
--- a/arch/powerpc/mm/hugetlbpage-hash64.c
+++ b/arch/powerpc/mm/hugetlbpage-hash64.c
@@ -62,6 +62,10 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid,
new_pte |= _PAGE_DIRTY;
} while(!pte_xchg(ptep, __pte(old_pte), __pte(new_pte)));
+ /* Make sure this is a hugetlb entry */
+ if (old_pte & (H_PAGE_THP_HUGE | _PAGE_DEVMAP))
+ return 0;
+
rflags = htab_convert_pte_flags(new_pte);
if (unlikely(mmu_psize == MMU_PAGE_16G))
offset = PTRS_PER_PUD;