yaffs : Change bitmap counting function to use hweight8()

Better than shift counting.

Signed-off-by: Charles Manning <cdhmanning@gmail.com>

diff --git a/yaffs_bitmap.c b/yaffs_bitmap.c
index 5d1cfb2965197ba853011551571e2301ec5e9a6d..b2542660b22a5ee12c86a662cedbe45c7abec3af 100644 (file)
--- a/yaffs_bitmap.c
+++ b/yaffs_bitmap.c
@@ -90,15 +90,9 @@ int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk)
        u8 *blk_bits = yaffs_block_bits(dev, blk);
        int i;
        int n = 0;
-       for (i = 0; i < dev->chunk_bit_stride; i++) {
-               u8 x = *blk_bits;
-               while (x) {
-                       if (x & 1)
-                               n++;
-                       x >>= 1;
-               }
 
-               blk_bits++;
-       }
+       for (i = 0; i < dev->chunk_bit_stride; i++, blk_bits++)
+               n += hweight8(*blk_bits);
+
        return n;
 }