Use memweight() to count the total number of bits clear in memory area.
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Cc: linux-fsdevel@xxxxxxxxxxxxxxx
---
No changes from v1
fs/minix/bitmap.c | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/fs/minix/bitmap.c b/fs/minix/bitmap.c
index 4bc50da..564f1a5 100644
--- a/fs/minix/bitmap.c
+++ b/fs/minix/bitmap.c
@@ -29,10 +29,8 @@ static __u32 count_free(struct buffer_head *map[], unsigned blocksize, __u32 num
unsigned blocks = DIV_ROUND_UP(numbits, blocksize * 8);
while (blocks--) {
- unsigned words = blocksize / 2;
- __u16 *p = (__u16 *)(*map++)->b_data;
- while (words--)
- sum += 16 - hweight16(*p++);
+ sum += blocksize * BITS_PER_BYTE -
+ memweight((*map++)->b_data, blocksize);
}
return sum;
--
1.7.7.6
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