linux-kernel - Re: [PATCH v2 1/2] mmc: sdhci: use IS_REACHABLE(CONFIG_LEDS

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Date:	Wed, 20 Apr 2016 09:14:54 +0300
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	linux-mmc@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [PATCH v2 1/2] mmc: sdhci: use IS_REACHABLE(CONFIG_LEDS_CLASS) to
 enable LED code

On 14/04/16 07:19, Masahiro Yamada wrote:
> defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \
>     defined(CONFIG_MMC_SDHCI_MODULE))
> 
> is equivalent to:
> 
> defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \
>     defined(MODULE))
> 
> and it can also be written shortly as:
> 
> IS_REACHABLE(CONFIG_LEDS_CLASS)
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>

Acked-by: Adrian Hunter <adrian.hunter@...el.com>


> ---
> 
> Changes in v2:
>   - Rebase on the next branch (7766e58f5be39dcc35d30a703422a3d0b8ec8c0c)
> 
>  drivers/mmc/host/sdhci.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index b284924..eedc18a 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -259,9 +259,7 @@ static void __sdhci_led_deactivate(struct sdhci_host *host)
>  	sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
>  }
>  
> -#if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \
> -				   defined(CONFIG_MMC_SDHCI_MODULE))
> -
> +#if IS_REACHABLE(CONFIG_LEDS_CLASS)
>  static void sdhci_led_control(struct led_classdev *led,
>  			      enum led_brightness brightness)
>  {
>