On Thu, Jun 13, 2019 at 11:43:25AM +0200, Christoph Hellwig wrote:

The migrate_vma helper is only used by noveau to migrate device private
pages around.  Other HMM_MIRROR users like amdgpu or infiniband don't
need it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/gpu/drm/nouveau/Kconfig | 1 +
 mm/Kconfig                      | 1 -
 2 files changed, 1 insertion(+), 1 deletion(-)

Yes, the thing that calls migrate_vma() should be the thing that has
the kconfig stuff.

Reviewed-by: Jason Gunthorpe <redacted>

Jason