Commit 5e549e98 authored Aug 09, 2010 by Andrea Arcangeli Committed by Linus Torvalds Aug 09, 2010

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>

parent ff36b801

mm/mmap.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -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);