linux-kernel - Re: [RFC 3/3] gpiolib: coldfire: remove custom asm/gpio.h

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Date:   Tue, 9 Nov 2021 21:07:44 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     linux-gpio@...r.kernel.org, Bartosz Golaszewski <brgl@...ev.pl>,
        linux-m68k@...ts.linux-m68k.org, geert@...ux-m68k.org,
        gerg@...ux-m68k.org, linux@...linux.org.uk,
        linux-arm-kernel@...ts.infradead.org, linux-sh@...r.kernel.org,
        dalias@...c.org, ysato@...rs.sourceforge.jp,
        Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: Re: [RFC 3/3] gpiolib: coldfire: remove custom asm/gpio.h

On Fri, Nov 5, 2021 at 2:05 PM Arnd Bergmann <arnd@...nel.org> wrote:

> From: Arnd Bergmann <arnd@...db.de>
>
> Now that coldfire is the only user of a custom asm/gpio.h, it seems
> better to remove this as well, and have the same interface everywhere.
>
> For the gpio_get_value()/gpio_set_value()/gpio_to_irq(), gpio_cansleep()
> functions, the custom version is only a micro-optimization to inline the
> function for constant GPIO numbers. However, in the coldfire defconfigs,
> I was unable to find a single instance where this micro-optimization
> was even used, so to my best knowledge removing this has no downsides.
>
> The custom gpio_request_one() function is even less useful, as it is
> guarded by an #ifdef that is never true.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij