[PATCH] mm: mmap: remove the first mapping check

[PATCH] mm: mmap: remove the first mapping check

[Huang Shijie]

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@freescale.com>
---
 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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