yaffs : Change bitmap counting function to use hweight8()

[yaffs2.git] / yaffs_bitmap.c

diff --git a/yaffs_bitmap.c b/yaffs_bitmap.c
index d54a27a9067ee1d67496238a0b6b266429bf2563..b2542660b22a5ee12c86a662cedbe45c7abec3af 100644 (file)
--- a/yaffs_bitmap.c
+++ b/yaffs_bitmap.c
@@ -21,21 +21,21 @@ static Y_INLINE u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk)
 {
        if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
                T(YAFFS_TRACE_ERROR,
-                       (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
-                       blk));
+                 (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
+                  blk));
                YBUG();
        }
        return dev->chunk_bits +
-               (dev->chunk_bit_stride * (blk - dev->internal_start_block));
+           (dev->chunk_bit_stride * (blk - dev->internal_start_block));
 }
 
 void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk)
 {
        if (blk < dev->internal_start_block || blk > dev->internal_end_block ||
-                       chunk < 0 || chunk >= dev->param.chunks_per_block) {
+           chunk < 0 || chunk >= dev->param.chunks_per_block) {
                T(YAFFS_TRACE_ERROR,
-               (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
-                       blk, chunk));
+                 (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid" TENDSTR),
+                  blk, chunk));
                YBUG();
        }
 }
@@ -90,16 +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;
 }
-