Re: [PATCH v2 2/4] s390/mm: Export force_dma_unencrypted

[Christoph Hellwig]

On Tue, Sep 03, 2019 at 03:15:02PM +0200, Thomas Hellström (VMware) wrote:
> From: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
> 
> The force_dma_unencrypted symbol is needed by TTM to set up the correct
> page protection when memory encryption is active. Export it.

Smae here.  None of a drivers business.  DMA decisions are hidden
behind the DMA API.