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From: Akinobu Mita <akinobu.mita@gmail.com>
To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org
Cc: Akinobu Mita <akinobu.mita@gmail.com>,
	Ralph Campbell <infinipath@qlogic.com>,
	Roland Dreier <rolandd@cisco.com>, Sean Hefty <sean.hefty@intel.com>,
	Hal Rosenstock <hal.rosenstock@gmail.com>, linux-rdma@vger.kernel.org
Subject: [PATCH] ipath: Use bitmap_weight
Date: Mon, 16 Nov 2009 12:08:00 +0900
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diff --git a/drivers/infiniband/hw/ipath/ipath_driver.c b/drivers/infiniband/hw/ipath/ipath_driver.c
index 013d138..d2787fe 100644
--- a/drivers/infiniband/hw/ipath/ipath_driver.c
+++ b/drivers/infiniband/hw/ipath/ipath_driver.c
@@ -39,6 +39,7 @@
 #include <linux/delay.h>
 #include <linux/netdevice.h>
 #include <linux/vmalloc.h>
+#include <linux/bitmap.h>
 
 #include "ipath_kernel.h"
 #include "ipath_verbs.h"
@@ -1697,7 +1698,7 @@ void ipath_chg_pioavailkernel(struct ipath_devdata *dd, unsigned start,
 			      unsigned len, int avail)
 {
 	unsigned long flags;
-	unsigned end, cnt = 0, next;
+	unsigned end, cnt = 0;
 
 	/* There are two bits per send buffer (busy and generation) */
 	start *= 2;
@@ -1748,12 +1749,7 @@ void ipath_chg_pioavailkernel(struct ipath_devdata *dd, unsigned start,
 
 	if (dd->ipath_pioupd_thresh) {
 		end = 2 * (dd->ipath_piobcnt2k + dd->ipath_piobcnt4k);
-		next = find_first_bit(dd->ipath_pioavailkernel, end);
-		while (next < end) {
-			cnt++;
-			next = find_next_bit(dd->ipath_pioavailkernel, end,
-					next + 1);
-		}
+		cnt = bitmap_weight(dd->ipath_pioavailkernel, end);
 	}
 	spin_unlock_irqrestore(&ipath_pioavail_lock, flags);