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Diffstat (limited to 'fs/hpfs/super.c')
-rw-r--r--fs/hpfs/super.c17
1 files changed, 8 insertions, 9 deletions
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f2feaa06bf26..cadc4ce48656 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 */
@@ -115,15 +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++) {
- unsigned b;
- if (!bits[i]) continue;
- for (b = bits[i]; b; b>>=1) count += b & 1;
- }
+ 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;
}