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mmap: remove unnecessary lock from __vma_link 

There's no anon-vma related mangling happening inside __vma_link anymore
so no need of anon_vma locking there.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrea Arcangeli 2010-08-09 17:19:07 -07:00 committed by Linus Torvalds
parent ff36b80162
commit 5e549e989f
1 changed files with 0 additions and 2 deletions
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2
mm/mmap.c
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@ -452,12 +452,10 @@ static void vma_link(struct mm_struct *mm, struct vm_area_struct *vma,
spin_lock(&mapping->i_mmap_lock);
vma->vm_truncate_count = mapping->truncate_count;
}
vma_lock_anon_vma(vma);
__vma_link(mm, vma, prev, rb_link, rb_parent);
__vma_link_file(vma);
vma_unlock_anon_vma(vma);
if (mapping)
spin_unlock(&mapping->i_mmap_lock);