linux-kernel - Re: [PATCH 4/9] power: supply: axp20x_usb

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Date:   Mon, 15 May 2017 15:25:19 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.co.uk>
To:     Julia Lawall <Julia.Lawall@...6.fr>
Cc:     keescook@...omium.org, kernel-janitors@...r.kernel.org,
        Chen-Yu Tsai <wens@...e.org>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/9] power: supply: axp20x_usb_power: Drop unnecessary
 static

Hi Julia,

On Thu, May 04, 2017 at 10:10:49PM +0200, Julia Lawall wrote:
> Drop static on a local variable, when the variable is either first
> initialized or never used, on every possible execution path through the
> function.  The static has no benefit, and dropping it reduces the code
> size.
> 
> [...]
> 
> before:
>    text    data     bss     dec     hex filename
>    2865     252       8    3125     c35 drivers/power/supply/axp20x_usb_power.o
> 
> after:
>    text    data     bss     dec     hex filename
>    2822     252       0    3074     c02 drivers/power/supply/axp20x_usb_power.o

Thanks, queued.

-- Sebastian

> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> 
> ---
>  drivers/power/supply/axp20x_usb_power.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c
> index 2397c48..44f70dc 100644
> --- a/drivers/power/supply/axp20x_usb_power.c
> +++ b/drivers/power/supply/axp20x_usb_power.c
> @@ -339,7 +339,7 @@ static int axp20x_usb_power_probe(struct platform_device *pdev)
>  		"VBUS_REMOVAL", "VBUS_VALID", "VBUS_NOT_VALID", NULL };
>  	static const char * const axp22x_irq_names[] = {
>  		"VBUS_PLUGIN", "VBUS_REMOVAL", NULL };
> -	static const char * const *irq_names;
> +	const char * const *irq_names;
>  	const struct power_supply_desc *usb_power_desc;
>  	int i, irq, ret;
>  
> 

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