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userfaultfd: use vma_is_anonymous

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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/[email protected]
Signed-off-by: Andrea Arcangeli <[email protected]>
Cc: "Dr. David Alan Gilbert" <[email protected]>
Cc: Hillf Danton <[email protected]>
Cc: Michael Rapoport <[email protected]>
Cc: Mike Kravetz <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Pavel Emelyanov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Andrea Arcangeli 2017-02-22 15:42:15 -08:00 • committed by Linus Torvalds
commit a94720bf82
2 changed files with 5 additions and 5 deletions
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2
mm/userfaultfd.c
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@ -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;
/*