linux-kernel - Re: [PATCH 04/14] x86: use generic swiotlb

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Message-ID: <20180315133530.GA17956@lst.de>
Date:   Thu, 15 Mar 2018 14:35:30 +0100
From:   Christoph Hellwig <hch@....de>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Christoph Hellwig <hch@....de>, x86@...nel.org,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        David Woodhouse <dwmw2@...radead.org>,
        Muli Ben-Yehuda <mulix@...ix.org>,
        Jon Mason <jdmason@...zu.us>, Joerg Roedel <joro@...tes.org>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/14] x86: use generic swiotlb_ops

On Thu, Mar 15, 2018 at 01:52:14PM +0100, Thomas Gleixner wrote:
> Yeah, I know that the standard defines it, but that doesn't mean it makes
> sense. At least not to me.

It makes sense in that it logically is a boolean but we only want
to allocate 1 bit for it, unlike the normal ABI allocations of at
least a byte.

Either way, tell me what you want it changed to, and I'll do it.