diff options
| -rw-r--r-- | mm/mmap.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 37a72e4d437b..c7cbb405d5b3 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1628,7 +1628,6 @@ EXPORT_SYMBOL(find_vma); /* * Same as find_vma, but also return a pointer to the previous VMA in *pprev. - * Note: pprev is set to NULL when return value is NULL. */ struct vm_area_struct * find_vma_prev(struct mm_struct *mm, unsigned long addr, @@ -1637,7 +1636,16 @@ find_vma_prev(struct mm_struct *mm, unsigned long addr, struct vm_area_struct *vma; vma = find_vma(mm, addr); - *pprev = vma ? vma->vm_prev : NULL; + if (vma) { + *pprev = vma->vm_prev; + } else { + struct rb_node *rb_node = mm->mm_rb.rb_node; + *pprev = NULL; + while (rb_node) { + *pprev = rb_entry(rb_node, struct vm_area_struct, vm_rb); + rb_node = rb_node->rb_right; + } + } return vma; } |