linux-kernel - Re: [PATCH] gpio: make several const arrays static, shrinks object size

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Message-ID: <20180418174043.GA15833@sophia>
Date:   Wed, 18 Apr 2018 13:40:43 -0400
From:   William Breathitt Gray <vilhelm.gray@...il.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] gpio: make several const arrays static, shrinks object
 size

On Wed, Apr 18, 2018 at 06:26:34PM +0100, Colin King wrote:
>From: Colin Ian King <colin.king@...onical.com>
>
>Don't populate the const read-only arrays 'port' on the stack but
>instead make them static. Makes the object code smaller:
>
>Before:
>  text    data     bss     dec    hex filename
>  8542    4088     672   13302   33f6 drivers/gpio/gpio-gpio-mm.o
> 10959    4952     832   16743   4167 drivers/gpio/gpio-104-dio-48e.o
>  9022    5064    1408   15494   3c86 drivers/gpio/gpio-104-idi-48.o
>
>After:
>  text    data     bss     dec    hex filename
>  8372    4144     672   13188   3384 drivers/gpio/gpio-gpio-mm.o
> 10790    5008     832   16630   40f6 drivers/gpio/gpio-104-dio-48e.o
>  8853    5152    1408   15413   3c35 linux/drivers/gpio/gpio-104-idi-48.o
>
>(gcc version 7.2.0 x86_64)
>
>Signed-off-by: Colin Ian King <colin.king@...onical.com>

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