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Date:   Tue, 3 Sep 2019 06:46:49 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Thomas =?iso-8859-1?Q?Hellstr=F6m_=28VMware=29?= 
        <thomas_os@shipmail.org>
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Subject: Re: [PATCH v2 2/4] s390/mm: Export force_dma_unencrypted
Message-ID: <20190903134649.GB2951@infradead.org>
References: <20190903131504.18935-1-thomas_os@shipmail.org>
 <20190903131504.18935-3-thomas_os@shipmail.org>
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On Tue, Sep 03, 2019 at 03:15:02PM +0200, Thomas Hellstr?m (VMware) wrote:
> From: Thomas Hellstrom <thellstrom@vmware.com>
> 
> 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.