linux-kernel - Re: [PATCH] sound: use bitmap

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Date:	Sat, 17 Nov 2012 11:36:19 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Joe Perches <joe@...ches.com>
Cc:	Akinobu Mita <akinobu.mita@...il.com>, alsa-devel@...a-project.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sound: use bitmap_weight

At Fri, 16 Nov 2012 23:35:16 -0800,
Joe Perches wrote:
> 
> Use bitmap_weight to count the total number of bits set in bitmap.
> 
> Signed-off-by: Joe Perches <joe@...ches.com>

Thanks, applied.


Takashi

> ---
>  sound/usb/endpoint.c |    7 +------
>  1 files changed, 1 insertions(+), 6 deletions(-)
> 
> diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
> index 34de6f2..51a9aa3 100644
> --- a/sound/usb/endpoint.c
> +++ b/sound/usb/endpoint.c
> @@ -485,15 +485,10 @@ __exit_unlock:
>  static int wait_clear_urbs(struct snd_usb_endpoint *ep)
>  {
>  	unsigned long end_time = jiffies + msecs_to_jiffies(1000);
> -	unsigned int i;
>  	int alive;
>  
>  	do {
> -		alive = 0;
> -		for (i = 0; i < ep->nurbs; i++)
> -			if (test_bit(i, &ep->active_mask))
> -				alive++;
> -
> +		alive = bitmap_weight(&ep->active_mask, ep->nurbs);
>  		if (!alive)
>  			break;
>  
> 
> 
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