Remove the first mapping check for vma_link.
move the mutex_lock into the braces when vma->vm_file is true.
Signed-off-by: Huang Shijie <b32955@xxxxxxxxxxxxx>
---
mm/mmap.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index b1202cf..e77526a 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -640,11 +640,10 @@ static void vma_link(struct mm_struct *mm, struct vm_area_struct *vma,
{
struct address_space *mapping = NULL;
- if (vma->vm_file)
+ if (vma->vm_file) {
mapping = vma->vm_file->f_mapping;
-
- if (mapping)
mutex_lock(&mapping->i_mmap_mutex);
+ }
__vma_link(mm, vma, prev, rb_link, rb_parent);
__vma_link_file(vma);
--
1.7.2.rc3
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