From a94720bf821dd63e72176da5f423ba7935dde67d Mon Sep 17 00:00:00 2001
From: Andrea Arcangeli <aarcange@redhat.com>
Date: Wed, 22 Feb 2017 15:42:15 -0800
Subject: userfaultfd: use vma_is_anonymous

Cleanup the vma->vm_ops usage.

Side note: it would be more robust if vma_is_anonymous() would also
check that vm_flags hasn't VM_PFNMAP set.

Link: http://lkml.kernel.org/r/20161216144821.5183-5-aarcange@redhat.com
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michael Rapoport <RAPOPORT@il.ibm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/userfaultfd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'mm/userfaultfd.c')

diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c
index af817e5060fb..9c2ed70ac78d 100644
--- a/mm/userfaultfd.c
+++ b/mm/userfaultfd.c
@@ -197,7 +197,7 @@ retry:
 	 * FIXME: only allow copying on anonymous vmas, tmpfs should
 	 * be added.
 	 */
-	if (dst_vma->vm_ops)
+	if (!vma_is_anonymous(dst_vma))
 		goto out_unlock;
 
 	/*
-- 
cgit