linux-kernel - Re: [PATCH] hwmon: (asc7621): make several arrays static const

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Message-ID: <2538a003-76c7-9cb8-e4d4-c2482945312a@roeck-us.net>
Date:   Wed, 30 Aug 2017 06:32:39 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Colin King <colin.king@...onical.com>,
        George Joseph <george.joseph@...rview5.com>,
        Jean Delvare <jdelvare@...e.com>, linux-hwmon@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hwmon: (asc7621): make several arrays static const

On 08/30/2017 01:32 AM, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Don't populate the arrays on the stack, instead make them static.
> Makes the object code smaller by over 950 bytes:
> 
> Before:
>     text	   data	    bss	    dec	    hex	filename
>    26144	  18768	    352	  45264	   b0d0	drivers/hwmon/asc7621.o
> 
> After:
>     text	   data	    bss	    dec	    hex	filename
>    25029	  18928	    352	  44309	   ad15	drivers/hwmon/asc7621.o
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Applied to hwmon-next.

Thanks,
Guenter

> ---
>   drivers/hwmon/asc7621.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/hwmon/asc7621.c b/drivers/hwmon/asc7621.c
> index c77644d45a02..4875e99b59c9 100644
> --- a/drivers/hwmon/asc7621.c
> +++ b/drivers/hwmon/asc7621.c
> @@ -512,7 +512,7 @@ static ssize_t show_pwm_ac(struct device *dev,
>   {
>   	SETUP_SHOW_DATA_PARAM(dev, attr);
>   	u8 config, altbit, regval;
> -	const u8 map[] = {
> +	static const u8 map[] = {
>   		0x01, 0x02, 0x04, 0x1f, 0x00, 0x06, 0x07, 0x10,
>   		0x08, 0x0f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f
>   	};
> @@ -533,7 +533,7 @@ static ssize_t store_pwm_ac(struct device *dev,
>   	SETUP_STORE_DATA_PARAM(dev, attr);
>   	unsigned long reqval;
>   	u8 currval, config, altbit, newval;
> -	const u16 map[] = {
> +	static const u16 map[] = {
>   		0x04, 0x00, 0x01, 0xff, 0x02, 0xff, 0x05, 0x06,
>   		0x08, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0f,
>   		0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
>