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Date: Thu, 18 Jul 2019 19:56:55 +0200
From: Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v3 4/6] x86,s390/mm: Move sme_active() and sme_me_mask
 to x86-specific header
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To: "Lendacky, Thomas" <Thomas.Lendacky@amd.com>
Cc: Thiago Jung Bauermann <bauerman@linux.ibm.com>, "x86@kernel.org" <x86@kernel.org>, "iommu@lists.linux-foundation.org" <iommu@lists.linux-foundation.org>, "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>, "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>, "linux-s390@vger.kernel.org" <linux-s390@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>, Christoph Hellwig <hch@lst.de>, Marek Szyprowski <m.szyprowski@samsung.com>, Robin Murphy <robin.murphy@arm.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Alexey Dobriyan <adobriyan@gmail.com>, Halil Pasic <pasic@linux.ibm.com>, Mike Anderson <andmike@linux.ibm.com>, Ram Pai <linuxram@us.ibm.com>

On Thu, Jul 18, 2019 at 05:42:18PM +0000, Lendacky, Thomas wrote:
> You may want to try and build the out-of-tree nvidia driver just to be
> sure you can remove the EXPORT_SYMBOL(). But I believe that was related
> to the DMA mask check, which now removed, may no longer be a problem.

Out of tree driver simply don't matter for kernel development decisions.