Messages in this thread Patch in this message | | | Date | Thu, 9 Aug 2012 20:21:37 +0800 | Subject | [patch] mmap: feed back correct prev vma when finding vma | From | Hillf Danton <> |
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After walking rb tree, if vma is determined, prev vma has to be determined based on vma; and rb_prev should be considered only if no vma determined.
Signed-off-by: Hillf Danton <dhillf@gmail.com> ---
--- a/mm/mmap.c Fri Aug 3 07:38:10 2012 +++ b/mm/mmap.c Mon Aug 6 20:10:18 2012 @@ -385,9 +385,13 @@ find_vma_prepare(struct mm_struct *mm, u } }
- *pprev = NULL; - if (rb_prev) - *pprev = rb_entry(rb_prev, struct vm_area_struct, vm_rb); + if (vma) { + *pprev = vma->vm_prev; + } else { + *pprev = NULL; + if (rb_prev) + *pprev = rb_entry(rb_prev, struct vm_area_struct, vm_rb); + } *rb_link = __rb_link; *rb_parent = __rb_parent; return vma; --
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