linux-kernel - Re: [PATCH v2 1/3] leds: Replace flags bit shift with BIT() macros

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Date:   Thu, 14 Sep 2017 21:43:00 +0200
From:   Jacek Anaszewski <jacek.anaszewski@...il.com>
To:     David Lin <dtwlin@...gle.com>, corbet@....net, rpurdie@...ys.net,
        pavel@....cz, hdegoede@...hat.com, gregkh@...uxfoundation.org
Cc:     robh@...nel.org, romlem@...gle.com, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-leds@...r.kernel.org
Subject: Re: [PATCH v2 1/3] leds: Replace flags bit shift with BIT() macros

Hi David,

Thanks for the patch.

On 09/13/2017 07:53 PM, David Lin wrote:
> This is for readability as well as to avoid checkpatch warnings when
> adding new bit flag information in the future.
> 
> Signed-off-by: David Lin <dtwlin@...gle.com>
> ---
>  include/linux/leds.h | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/include/linux/leds.h b/include/linux/leds.h
> index bf6db4fe895b..5579c64c8fd6 100644
> --- a/include/linux/leds.h
> +++ b/include/linux/leds.h
> @@ -40,16 +40,16 @@ struct led_classdev {
>  	int			 flags;
>  
>  	/* Lower 16 bits reflect status */
> -#define LED_SUSPENDED		(1 << 0)
> -#define LED_UNREGISTERING	(1 << 1)
> +#define LED_SUSPENDED		BIT(0)
> +#define LED_UNREGISTERING	BIT(1)
>  	/* Upper 16 bits reflect control information */
> -#define LED_CORE_SUSPENDRESUME	(1 << 16)
> -#define LED_SYSFS_DISABLE	(1 << 17)
> -#define LED_DEV_CAP_FLASH	(1 << 18)
> -#define LED_HW_PLUGGABLE	(1 << 19)
> -#define LED_PANIC_INDICATOR	(1 << 20)
> -#define LED_BRIGHT_HW_CHANGED	(1 << 21)
> -#define LED_RETAIN_AT_SHUTDOWN	(1 << 22)
> +#define LED_CORE_SUSPENDRESUME	BIT(16)
> +#define LED_SYSFS_DISABLE	BIT(17)
> +#define LED_DEV_CAP_FLASH	BIT(18)
> +#define LED_HW_PLUGGABLE	BIT(19)
> +#define LED_PANIC_INDICATOR	BIT(20)
> +#define LED_BRIGHT_HW_CHANGED	BIT(21)
> +#define LED_RETAIN_AT_SHUTDOWN	BIT(22)
>  
>  	/* set_brightness_work / blink_timer flags, atomic, private. */
>  	unsigned long		work_flags;
> 

This one should not raise any doubts.

Applied to the for-4.15 branch of linux-leds.git.

-- 
Best regards,
Jacek Anaszewski