linux-kernel - Re: [PATCH 05/13] cpufreq/arch: powerpc: pasemi: Move prototypes to shared header

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Date:   Wed, 15 Jul 2020 07:33:11 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Olof Johansson <olof@...om.net>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        viresh kumar <viresh.kumar@...aro.org>,
        Linux ARM Mailing List <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-pm@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH 05/13] cpufreq/arch: powerpc: pasemi: Move prototypes to
 shared header

On Tue, 14 Jul 2020, Olof Johansson wrote:

> On Tue, Jul 14, 2020 at 7:50 AM Lee Jones <lee.jones@...aro.org> wrote:
> >
> > If function callers and providers do not share the same prototypes the
> > compiler complains of missing prototypes.  Fix this by moving the
> > already existing prototypes out to a mutually convenient location.
> >
> > Fixes the following W=1 kernel build warning(s):
> >
> >  drivers/cpufreq/pasemi-cpufreq.c:109:5: warning: no previous prototype for ‘check_astate’ [-Wmissing-prototypes]
> >  109 | int check_astate(void)
> >  | ^~~~~~~~~~~~
> >  drivers/cpufreq/pasemi-cpufreq.c:114:6: warning: no previous prototype for ‘restore_astate’ [-Wmissing-prototypes]
> >  114 | void restore_astate(int cpu)
> >  | ^~~~~~~~~~~~~~
> >
> > Cc: Olof Johansson <olof@...om.net>
> > Cc: Michael Ellerman <mpe@...erman.id.au>
> > Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> > Cc: Paul Mackerras <paulus@...ba.org>
> > Cc: linuxppc-dev@...ts.ozlabs.org
> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
> > ---
> >  arch/powerpc/platforms/pasemi/pasemi.h    | 15 ------------
> >  arch/powerpc/platforms/pasemi/powersave.S |  2 ++
> >  drivers/cpufreq/pasemi-cpufreq.c          |  1 +
> >  include/linux/platform_data/pasemi.h      | 28 +++++++++++++++++++++++
> >  4 files changed, 31 insertions(+), 15 deletions(-)
> >  create mode 100644 include/linux/platform_data/pasemi.h
> >
> > diff --git a/arch/powerpc/platforms/pasemi/pasemi.h b/arch/powerpc/platforms/pasemi/pasemi.h
> > index 70b56048ed1be..528d81ef748ad 100644
> > --- a/arch/powerpc/platforms/pasemi/pasemi.h
> > +++ b/arch/powerpc/platforms/pasemi/pasemi.h
> > @@ -15,21 +15,6 @@ extern void __init pasemi_map_registers(void);
> >  extern void idle_spin(void);
> >  extern void idle_doze(void);
> >
> > -/* Restore astate to last set */
> > -#ifdef CONFIG_PPC_PASEMI_CPUFREQ
> > -extern int check_astate(void);
> > -extern void restore_astate(int cpu);
> > -#else
> > -static inline int check_astate(void)
> > -{
> > -       /* Always return >0 so we never power save */
> > -       return 1;
> > -}
> > -static inline void restore_astate(int cpu)
> > -{
> > -}
> > -#endif
> > -
> >  extern struct pci_controller_ops pasemi_pci_controller_ops;
> >
> >  #endif /* _PASEMI_PASEMI_H */
> > diff --git a/arch/powerpc/platforms/pasemi/powersave.S b/arch/powerpc/platforms/pasemi/powersave.S
> > index d0215d5329ca7..7747b48963286 100644
> > --- a/arch/powerpc/platforms/pasemi/powersave.S
> > +++ b/arch/powerpc/platforms/pasemi/powersave.S
> > @@ -5,6 +5,8 @@
> >   * Maintained by: Olof Johansson <olof@...om.net>
> >   */
> >
> > +#include <linux/platform_data/pasemi.h>
> > +
> >  #include <asm/processor.h>
> >  #include <asm/page.h>
> >  #include <asm/ppc_asm.h>
> > diff --git a/drivers/cpufreq/pasemi-cpufreq.c b/drivers/cpufreq/pasemi-cpufreq.c
> > index c66f566a854cb..c6bb3ecc90ef3 100644
> > --- a/drivers/cpufreq/pasemi-cpufreq.c
> > +++ b/drivers/cpufreq/pasemi-cpufreq.c
> > @@ -15,6 +15,7 @@
> >  #include <linux/timer.h>
> >  #include <linux/module.h>
> >  #include <linux/of_address.h>
> > +#include <linux/platform_data/pasemi.h>
> >
> >  #include <asm/hw_irq.h>
> >  #include <asm/io.h>
> > diff --git a/include/linux/platform_data/pasemi.h b/include/linux/platform_data/pasemi.h
> > new file mode 100644
> > index 0000000000000..3fed0687fcc9a
> > --- /dev/null
> > +++ b/include/linux/platform_data/pasemi.h
> > @@ -0,0 +1,28 @@
> > +/* SPDX-License-Identifier: GPL-2.0-only */
> > +/*
> > + * Copyright (C) 2020 Linaro Ltd.
> > + *
> > + * Author: Lee Jones <lee.jones@...aro.org>
> > + */
> 
> Absolutely not. It's neither your copyright, nor your authorship.

The file was new.  Anyway, the point is now moot.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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