netdev - Re: [v15, 3/7] powerpc/fsl: move mpc85xx.h to include/linux/fsl

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Date:   Tue, 08 Nov 2016 16:47:00 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     "Y.B. Lu" <yangbo.lu@....com>
Cc:     "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
        Scott Wood <oss@...error.net>,
        Mark Rutland <mark.rutland@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "X.B. Xie" <xiaobo.xie@....com>,
        "M.H. Lian" <minghuan.lian@....com>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        Qiang Zhao <qiang.zhao@....com>,
        Russell King <linux@....linux.org.uk>,
        Bhupesh Sharma <bhupesh.sharma@...escale.com>,
        Joerg Roedel <joro@...tes.org>,
        Claudiu Manoil <claudiu.manoil@...escale.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Leo Li <leoyang.li@....com>,
        "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        Kumar Gala <galak@...eaurora.org>
Subject: Re: [v15, 3/7] powerpc/fsl: move mpc85xx.h to include/linux/fsl

On Tuesday, November 8, 2016 6:49:51 AM CET Y.B. Lu wrote:
> Hi Arnd,
> 
> 
> > -----Original Message-----
> > From: Arnd Bergmann [mailto:arnd@...db.de]
> > Sent: Tuesday, November 08, 2016 5:20 AM
> > To: Y.B. Lu
> > Cc: linuxppc-dev@...ts.ozlabs.org; linux-mmc@...r.kernel.org;
> > ulf.hansson@...aro.org; Scott Wood; Mark Rutland; Greg Kroah-Hartman; X.B.
> > Xie; M.H. Lian; linux-i2c@...r.kernel.org; linux-clk@...r.kernel.org;
> > Qiang Zhao; Russell King; Bhupesh Sharma; Joerg Roedel; Claudiu Manoil;
> > devicetree@...r.kernel.org; Rob Herring; Santosh Shilimkar; linux-arm-
> > kernel@...ts.infradead.org; netdev@...r.kernel.org; linux-
> > kernel@...r.kernel.org; Leo Li; iommu@...ts.linux-foundation.org; Kumar
> > Gala
> > Subject: Re: [v15, 3/7] powerpc/fsl: move mpc85xx.h to include/linux/fsl
> > 
> > On Monday, October 31, 2016 9:35:33 AM CET Y.B. Lu wrote:
> > > >
> > > > I don't see any of the contents of this header referenced by the soc
> > > > driver any more. I think you can just drop this patch.
> > > >
> > >
> > > [Lu Yangbo-B47093] This header file was included by guts.c.
> > > The guts driver used macro SVR_MAJ/SVR_MIN for calculation.
> > >
> > > This header file was for powerpc arch before. And this patch is to
> > > made it as common header file for both ARM and PPC.
> > > Sooner or later this is needed.
> > 
> > Let's discuss it once we actually need the header then, ok?
> 
> [Lu Yangbo-B47093] As I said, this header file was included by guts.c in patch 4.

Ah sorry, I misread your earlier reply, thinking you meant a potential
future patch.

> The guts driver used macro SVR_MAJ/SVR_MIN for calculation which were
> defined in this header file.
> Did you suggest we dropped this patch and just calculated them in driver?

That is probably nicer here: there is not that much value in sharing
the two one-line macro definitions, and the driver already hardcodes
the numeric per-chip IDs that make up most of the header file.

	Arnd