From: Akinobu Mita <akinobu.mita@gmail.com>
Date: Wed, 16 Dec 2009 00:46:56 +0000 (-0800)
Subject: hpfs: use bitmap_weight()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f4c54fcf3ae6bdc0abf4e777a9499e2581bc8e94;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

hpfs: use bitmap_weight()

Use bitmap_weight instead of doing hweight32 for each 32bit in bitmap.

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>
---

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index cf6fe4ad651..cadc4ce4865 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -14,6 +14,7 @@
 #include <linux/magic.h>
 #include <linux/sched.h>
 #include <linux/smp_lock.h>
+#include <linux/bitmap.h>
 
 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */
 
@@ -115,12 +116,13 @@ static void hpfs_put_super(struct super_block *s)
 unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
 {
 	struct quad_buffer_head qbh;
-	unsigned *bits;
-	unsigned i, count;
-	if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0;
-	count = 0;
-	for (i = 0; i < 2048 / sizeof(unsigned); i++)
-		count += hweight32(bits[i]);
+	unsigned long *bits;
+	unsigned count;
+
+	bits = hpfs_map_4sectors(s, secno, &qbh, 4);
+	if (!bits)
+		return 0;
+	count = bitmap_weight(bits, 2048 * BITS_PER_BYTE);
 	hpfs_brelse4(&qbh);
 	return count;
 }