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-rw-r--r--mm/memory.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/mm/memory.c b/mm/memory.c
index ae8161f1f45..8c88b973abc 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2045,8 +2045,18 @@ int __handle_mm_fault(struct mm_struct *mm, struct vm_area_struct * vma,
inc_page_state(pgfault);
- if (is_vm_hugetlb_page(vma))
- return VM_FAULT_SIGBUS; /* mapping truncation does this. */
+ if (unlikely(is_vm_hugetlb_page(vma))) {
+ if (valid_hugetlb_file_off(vma, address))
+ /* We get here only if there was a stale(zero) TLB entry
+ * (because of HW prefetching).
+ * Low-level arch code (if needed) should have already
+ * purged the stale entry as part of this fault handling.
+ * Here we just return.
+ */
+ return VM_FAULT_MINOR;
+ else
+ return VM_FAULT_SIGBUS; /* mapping truncation does this. */
+ }
/*
* We need the page table lock to synchronize with kswapd