diff options
| -rw-r--r-- | include/linux/mm.h | 1 | ||||
| -rw-r--r-- | mm/memory.c | 6 |
2 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 903f3b7..a0eec16 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 8b8f0d2..e7066e7 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); |