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authorHuang Shijie <b32955@freescale.com>2014-06-05 03:07:33 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-05 03:54:01 +0400
commit64ac4940d557df8caab602eaea679ec7eaf9a57f (patch)
treee4497bc71d3b43510beb12927e65adeb59391462 /mm/mmap.c
parent2329d3751b082b4fd354f334a88662d72abac52d (diff)
downloadlinux-64ac4940d557df8caab602eaea679ec7eaf9a57f.tar.xz
mm/mmap.c: remove the first mapping check
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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mmap.c')
-rw-r--r--mm/mmap.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 6cdec3a6f4bf..8a56d39df4ed 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);