NOMMU: Don't need to clear vm_mm when deleting a VMA
authorDavid Howells <dhowells@redhat.com>
Thu, 23 Feb 2012 13:51:00 +0000 (13:51 +0000)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 24 Feb 2012 16:59:04 +0000 (08:59 -0800)
Don't clear vm_mm in a deleted VMA as it's unnecessary and might
conceivably break the filesystem or driver VMA close routine.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/nommu.c

index ee7e57e..f59e170 100644 (file)
@@ -779,8 +779,6 @@ static void delete_vma_from_mm(struct vm_area_struct *vma)
 
        if (vma->vm_next)
                vma->vm_next->vm_prev = vma->vm_prev;
-
-       vma->vm_mm = NULL;
 }
 
 /*