linux-kernel - Re: [PATCH v2] gpiolib: Add stubs for gpiod lookup table interface

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Date:   Thu, 27 Apr 2017 17:07:23 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Anatolij Gustschin <agust@...x.de>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] gpiolib: Add stubs for gpiod lookup table interface

On Thu, Apr 27, 2017 at 9:52 AM, Anatolij Gustschin <agust@...x.de> wrote:
> Add stubs for gpiod_add_lookup_table() and gpiod_remove_lookup_table()
> for the !GPIOLIB case to prevent build errors. Also add prototypes.
>
> Signed-off-by: Anatolij Gustschin <agust@...x.de>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

Oh, has to take my tag back. See below why.


> --- a/include/linux/gpio/consumer.h
> +++ b/include/linux/gpio/consumer.h

It is already defined in machine.h.

What you basically need is to add stubs for !GPIOLIB case

#ifdef ...
...existing prototypes...
#else /* GPIOLIB */
static inline void gpiod_add_lookup_table(struct gpiod_lookup_table *table) {}
static inline void gpiod_remove_lookup_table(struct gpiod_lookup_table
*table) {}
#endif /* !GPIOLIB */

P.S. please notice how I put the stubs. It would be good to keep them
in two lines.

-- 
With Best Regards,
Andy Shevchenko