From c2923c3a3ed71563891585bf58481bcdde72f403 Mon Sep 17 00:00:00 2001
From: Akinobu Mita <akinobu.mita@gmail.com>
Date: Tue, 15 Dec 2009 16:46:55 -0800
Subject: [PATCH] hpfs: use hweight32

Use hweight32 instead of counting for each bit

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/hpfs/super.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f2feaa06bf2..cf6fe4ad651 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -119,11 +119,8 @@ unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
 	unsigned i, count;
 	if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0;
 	count = 0;
-	for (i = 0; i < 2048 / sizeof(unsigned); i++) {
-		unsigned b; 
-		if (!bits[i]) continue;
-		for (b = bits[i]; b; b>>=1) count += b & 1;
-	}
+	for (i = 0; i < 2048 / sizeof(unsigned); i++)
+		count += hweight32(bits[i]);
 	hpfs_brelse4(&qbh);
 	return count;
 }
-- 
2.20.1