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-rw-r--r--include/linux/mm.h1
-rw-r--r--mm/memory.c6
2 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 903f3b71f4a7..a0eec16eb0bd 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -637,6 +637,7 @@ static inline int page_mapped(struct page *page)
*/
#define NOPFN_SIGBUS ((unsigned long) -1)
#define NOPFN_OOM ((unsigned long) -2)
+#define NOPFN_REFAULT ((unsigned long) -3)
/*
* Different kinds of faults, as returned by handle_mm_fault().
diff --git a/mm/memory.c b/mm/memory.c
index 8b8f0d2b453d..e7066e71dfa3 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2355,10 +2355,12 @@ static noinline int do_no_pfn(struct mm_struct *mm, struct vm_area_struct *vma,
BUG_ON(is_cow_mapping(vma->vm_flags));
pfn = vma->vm_ops->nopfn(vma, address & PAGE_MASK);
- if (pfn == NOPFN_OOM)
+ if (unlikely(pfn == NOPFN_OOM))
return VM_FAULT_OOM;
- if (pfn == NOPFN_SIGBUS)
+ else if (unlikely(pfn == NOPFN_SIGBUS))
return VM_FAULT_SIGBUS;
+ else if (unlikely(pfn == NOPFN_REFAULT))
+ return VM_FAULT_MINOR;
page_table = pte_offset_map_lock(mm, pmd, address, &ptl);