linux-kernel - [PATCH] sound: use bitmap

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Date:	Fri, 16 Nov 2012 23:35:16 -0800
From:	Joe Perches <joe@...ches.com>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Akinobu Mita <akinobu.mita@...il.com>, alsa-devel@...a-project.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] sound: use bitmap_weight

Use bitmap_weight to count the total number of bits set in bitmap.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 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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