linux-kernel - Re: [PATCH] gpio: drop unnecessary includes from include/linux/gpio/driver.h

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Date:   Tue, 4 Jul 2017 08:58:51 -0400
From:   William Breathitt Gray <vilhelm.gray@...il.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-gpio@...r.kernel.org,
        Grygorii Strashko <grygorii.strashko@...com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Ray Jui <rjui@...adcom.com>,
        Sören Brinkmann <soren.brinkmann@...inx.com>,
        David Cohen <david.a.cohen@...ux.intel.com>,
        Scott Branden <sbranden@...adcom.com>,
        linux-acpi@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com,
        Florian Fainelli <f.fainelli@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Alexander Shiyan <shc_work@...l.ru>,
        Michal Simek <michal.simek@...inx.com>,
        Kevin Hilman <khilman@...nel.org>, linux-tegra@...r.kernel.org,
        Joel Stanley <joel@....id.au>, linux-omap@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        patches@...nsource.cirrus.com, Alban Bedel <albeu@...e.fr>,
        linux-kernel@...r.kernel.org,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Thor Thayer <thor.thayer@...ux.intel.com>,
        Tien Hock Loh <thloh@...era.com>
Subject: Re: [PATCH] gpio: drop unnecessary includes from
 include/linux/gpio/driver.h

On Tue, Jul 04, 2017 at 12:53:34PM +0900, Masahiro Yamada wrote:
>Some of include directives in include/linux/gpio/driver.h are
>unneeded because the header does not need to know the content of
>struct device, irq_chip, etc.  Just declare they are structures.
>
>On the other hand, <linux/irqhandler.h> and <linux/spinlock_types.h>
>turned out to be necessary for irq_flow_handler_t and spinlock_t,
>respectively.
>
>Each driver should include what it needs without relying on what is
>implicitly included from <linux/gpio/driver.h>.  This will cut down
>unnecessary header parsing.
>
>Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
>---
>
> drivers/gpio/gpio-104-dio-48e.c  |  1 +
> drivers/gpio/gpio-104-idi-48.c   |  1 +
> drivers/gpio/gpio-104-idio-16.c  |  1 +
> drivers/gpio/gpio-pci-idio-16.c  |  2 ++
> drivers/gpio/gpio-ws16c48.c      |  1 +

The changes to the above drivers look fine to me:

Acked-by: William Breathitt Gray <vilhelm.gray@...il.com>

However, this patch as a whole does too many things; I'd like to see it
split-up logically similar to how Andy Shevchenko suggested in his
reply. That should allow ACKs by respective driver maintainers to be
accounted more properly.

William Breathitt Gray