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

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Date:   Thu, 15 Mar 2018 14:48:09 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Christoph Hellwig <hch@....de>
cc:     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, 15 Mar 2018, Christoph Hellwig wrote:

> 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.

I'd prefer either bool or a regular bitfield, but I can live with the
boolean bitfield as well.