linux-kernel - Re: [PATCH] watchdog: cadence_wdt: make of_device

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Date:   Tue, 20 Jun 2017 13:53:51 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>
Cc:     wim@...ana.be, linux-watchdog@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] watchdog: cadence_wdt: make of_device_ids const.

On Tue, Jun 20, 2017 at 11:04:26AM +0530, Arvind Yadav wrote:
> of_device_ids are not supposed to change at runtime. All functions
> working with of_device_ids provided by <linux/of.h> work with const
> of_device_ids. So mark the non-const structs as const.
> 
> File size before:
>    text	   data	    bss	    dec	    hex	filename
>    1962	    612	      4	   2578	    a12	drivers/watchdog/cadence_wdt.o
> 
> File size after constify cdns_wdt_of_match:
>    text	   data	    bss	    dec	    hex	filename
>    2378	    196	      4	   2578	    a12	drivers/watchdog/cadence_wdt.o
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
>  drivers/watchdog/cadence_wdt.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/cadence_wdt.c b/drivers/watchdog/cadence_wdt.c
> index 8d61e8b..4824b0a 100644
> --- a/drivers/watchdog/cadence_wdt.c
> +++ b/drivers/watchdog/cadence_wdt.c
> @@ -458,7 +458,7 @@ static int __maybe_unused cdns_wdt_resume(struct device *dev)
>  
>  static SIMPLE_DEV_PM_OPS(cdns_wdt_pm_ops, cdns_wdt_suspend, cdns_wdt_resume);
>  
> -static struct of_device_id cdns_wdt_of_match[] = {
> +static const struct of_device_id cdns_wdt_of_match[] = {
>  	{ .compatible = "cdns,wdt-r1p2", },
>  	{ /* end of table */ }
>  };
> -- 
> 1.9.1
>