linux-kernel - Re: [PATCH v1 2/7] iommu/arm-smmu-v3: Replace s1_cfg with ctx_desc

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Message-ID: <ZMQO0iLDkgaDe7ZT@nvidia.com>
Date:   Fri, 28 Jul 2023 15:54:10 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Nicolin Chen <nicolinc@...dia.com>
Cc:     Michael Shavit <mshavit@...gle.com>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>, jean-philippe@...aro.org,
        baolu.lu@...ux.intel.com, linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/7] iommu/arm-smmu-v3: Replace s1_cfg with
 ctx_desc_cfg

On Fri, Jul 28, 2023 at 11:41:26AM -0700, Nicolin Chen wrote:
> On Fri, Jul 28, 2023 at 09:22:52AM -0300, Jason Gunthorpe wrote:
> > On Fri, Jul 28, 2023 at 03:47:45PM +0800, Michael Shavit wrote:
> > > On Fri, Jul 28, 2023 at 4:57 AM Nicolin Chen <nicolinc@...dia.com> wrote:
> > > 
> > > > It'd be nicer to align all the variables to "cd_table" like the
> > > > 2nd piece here. And if we rename the struct name too:
> > > >
> > > >         struct arm_smmu_cdtab_cfg *cd_table = xxxx;
> > > 
> > > I agree that renaming these would be nice. There's 36 usages of cdcfg
> > > in arm-smmu-v3.c, and 6 usages of  arm_smmu_ctx_desc_cfg.
> > > I can rename the struct since we'll be touching many of those in this
> > > patch anyways, but I'm a bit concerned of the churn from updating all
> > > the cdcfg usages.
> > 
> > Will was not keen on churn for clarity so it seem better to be
> > thoughtful about what is touched to get this merged.
> 
> Still, it would be odd to have "cdcfg" and "cd_table" at the same
> time. If we have to be conservative, perhaps we should just align
> with the old naming: "struct arm_smmu_ctx_desc_cfg *cdcfg;"...

Yeah, I think changing to cd_table in the places touched makes alot of
sense

Jason