change find_vma() to break ealier when found the adderss
is not in any vma, don't need loop to search all vma.
Signed-off-by: yalin wang <yalin.wang2...@gmail.com>
---
mm/mmap.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/mm/mmap.c b/mm/mmap.c
index b513f20..8294c9b 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2064,6 +2064,9 @@ struct vm_area_struct *find_vma(struct mm_struct *mm,
unsigned long addr)
vma = tmp;
if (tmp->vm_start <= addr)
break;
+ if (!tmp->vm_prev || tmp->vm_prev->vm_end <= addr)
+ break;
+
rb_node = rb_node->rb_left;
} else
rb_node = rb_node->rb_right;
--
1.9.1
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