linux-kernel - Re: [PATCH] gpio: 104-idi-48e: make array register

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Date:   Wed, 9 Oct 2019 18:22:16 +0200
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     William Breathitt Gray <vilhelm.gray@...il.com>
Cc:     Colin King <colin.king@...onical.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio <linux-gpio@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpio: 104-idi-48e: make array register_offset static,
 makes object smaller

niedz., 6 paź 2019 o 17:08 William Breathitt Gray
<vilhelm.gray@...il.com> napisał(a):
>
> On Sun, Oct 06, 2019 at 03:42:56PM +0100, Colin King wrote:
> > From: Colin Ian King <colin.king@...onical.com>
> >
> > Don't populate the array register_offset on the stack but instead make it
> > static. Makes the object code smaller by 63 bytes.  Also add the int type
> > specifier to clean up a checkpatch warning.
> >
> > Before:
> >    text          data     bss     dec     hex filename
> >    9212          5712    1408   16332    3fcc drivers/gpio/gpio-104-idi-48.o
> >
> > After:
> >    text          data     bss     dec     hex filename
> >    9085          5776    1408   16269    3f8d drivers/gpio/gpio-104-idi-48.o
> >
> > (gcc version 9.2.1, amd64)
> >
> > Signed-off-by: Colin Ian King <colin.king@...onical.com>
> > ---
> >  drivers/gpio/gpio-104-idi-48.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c
> > index ff53887bdaa8..c95c93ec0bd7 100644
> > --- a/drivers/gpio/gpio-104-idi-48.c
> > +++ b/drivers/gpio/gpio-104-idi-48.c
> > @@ -65,7 +65,7 @@ static int idi_48_gpio_get(struct gpio_chip *chip, unsigned offset)
> >  {
> >       struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip);
> >       unsigned i;
> > -     const unsigned register_offset[6] = { 0, 1, 2, 4, 5, 6 };
> > +     static const unsigned int register_offset[6] = { 0, 1, 2, 4, 5, 6 };
> >       unsigned base_offset;
> >       unsigned mask;
> >
> > --
> > 2.20.1
>
> Acked-by: William Breathitt Gray <vilhelm.gray@...il.com>

Applied for next.

Bart