linux-kernel - Re: [PATCH 05/46] ARM: pxa: split up mach/hardware.h

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Date:   Mon, 28 Oct 2019 20:14:18 +0100
From:   Robert Jarzmik <robert.jarzmik@...e.fr>
To:     Arnd Bergmann <arnd@...db.de>,
        Russell King <linux@....linux.org.uk>
Cc:     Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Pavel Machek <pavel@....cz>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Mark Brown <broonie@...nel.org>, linux-clk@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-input@...r.kernel.org,
        linux-leds@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-mtd@...ts.infradead.org, linux-rtc@...r.kernel.org,
        linux-usb@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org, linux-watchdog@...r.kernel.org,
        alsa-devel@...a-project.org
Subject: Re: [PATCH 05/46] ARM: pxa: split up mach/hardware.h

Arnd Bergmann <arnd@...db.de> writes:

> The mach/hardware.h is included in lots of places, and it provides
> three different things on pxa:
>
> - the cpu_is_pxa* macros
> - an indirect inclusion of mach/addr-map.h
> - the __REG() and io_pv2() helper macros
>
> Split it up into separate <linux/soc/pxa/cpu.h> and mach/pxa-regs.h
> headers, then change all the files that use mach/hardware.h to
> include the exact set of those three headers that they actually
> need, allowing for further more targeted cleanup.
>
> linux/soc/pxa/cpu.h can remain permanently exported and is now in
> a global location along with similar headers. pxa-regs.h and
> addr-map.h are only used in a very small number of drivers now
> and can be moved to arch/arm/mach-pxa/ directly when those drivers
> are to pass the necessary data as resources.

For the pxa part, that looks fine to me.
I'd like to focus a bit of Russell's attention to the sa11xx part (reminder in
[1]), and more specifically :

 - the change to drivers/pcmcia/soc_common.c
 - the change to drivers/pcmcia/sa1111_generic.c

I must admit my knowledge of PCMCIA is relatively poor, and even if the patch
looks harmless, one never knows if Assebet will ever by same after ...

Cheers.

--
Robert

[1] Extract of the patch for Russell's scrutiny
> diff --git a/drivers/pcmcia/sa1111_generic.c b/drivers/pcmcia/sa1111_generic.c
> index 11783410223b..2f556fa37c43 100644
> --- a/drivers/pcmcia/sa1111_generic.c
> +++ b/drivers/pcmcia/sa1111_generic.c
> @@ -17,7 +17,6 @@
>  
>  #include <pcmcia/ss.h>
>  
> -#include <mach/hardware.h>
>  #include <asm/hardware/sa1111.h>
>  #include <asm/mach-types.h>
>  #include <asm/irq.h>
... zip ...

> diff --git a/drivers/pcmcia/soc_common.c b/drivers/pcmcia/soc_common.c
> index 3a8c84bb174d..9276a628473d 100644
> --- a/drivers/pcmcia/soc_common.c
> +++ b/drivers/pcmcia/soc_common.c
> @@ -47,8 +47,6 @@
>  #include <linux/spinlock.h>
>  #include <linux/timer.h>
>  
> -#include <mach/hardware.h>
> -
>  #include "soc_common.h"
>  
>  static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev);