hpfs: use bitmap_weight()
Akinobu Mita [Wed, 16 Dec 2009 00:46:56 +0000 (16:46 -0800)]
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>

fs/hpfs/super.c

index cf6fe4a..cadc4ce 100644 (file)
@@ -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;
 }