linux-kernel - Re: [PATCH 6/7] arm, arm64: factorize common cpu capacity default code

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Date:   Thu, 19 Jan 2017 15:51:40 +0000
From:   Juri Lelli <juri.lelli@....com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        peterz@...radead.org, vincent.guittot@...aro.org,
        robh+dt@...nel.org, mark.rutland@....com, sudeep.holla@....com,
        lorenzo.pieralisi@....com, catalin.marinas@....com,
        will.deacon@....com, morten.rasmussen@....com,
        dietmar.eggemann@....com, broonie@...nel.org,
        gregkh@...uxfoundation.org
Subject: Re: [PATCH 6/7] arm, arm64: factorize common cpu capacity default
 code

Hi,

On 19/01/17 14:53, Russell King - ARM Linux wrote:
> On Thu, Jan 19, 2017 at 02:37:56PM +0000, Juri Lelli wrote:
> > +extern unsigned long
> > +arch_scale_cpu_capacity(struct sched_domain *sd, int cpu);
> > +extern void set_capacity_scale(unsigned int cpu, unsigned long capacity);
> 
> These should be in a header file (please run your code through sparse).
> 
> > +extern bool cap_parsing_failed;
> > +extern void normalize_cpu_capacity(void);
> > +extern int __init parse_cpu_capacity(struct device_node *cpu_node, int cpu);
> 
> Same for these.
> 

Right, I was wondering where to put these in the cover letter. New
header file (e.g., include/linux/arch_topology.h) or some existing one? 

> > diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
> > new file mode 100644
> > index 000000000000..3faf89518892
> > --- /dev/null
> > +++ b/drivers/base/arch_topology.c
> > @@ -0,0 +1,240 @@
> > +/*
> > + * driver/base/arch_topology.c - Arch specific cpu topology information
> > + *
> > + * Written by: Juri Lelli, ARM Ltd.
> > + *
> > + * Copyright (C) 2016, ARM Ltd.
> > + *
> > + * All rights reserved.
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License as published by
> > + * the Free Software Foundation; either version 2 of the License, or
> > + * (at your option) any later version.
> 
> The files that you've taken this code from are GPLv2, but you've thrown
> a GPLv2+ header on a file that's merely a copy of the original code.
> As some of the code you've moved to this new file is from Nicolas and
> Vincent, you need to seek their approval to make this change of license
> terms, or keep the original license terms.
> 

Apologies. I'd say we keep the original one. I'll modify it in the next
version.

Thanks,

- Juri