From 7620f7d1207e72dc6b3c58bc452000b9ec82b57b Mon Sep 17 00:00:00 2001 From: Charles Manning Date: Mon, 6 Dec 2010 10:45:02 +1300 Subject: [PATCH] yaffs : Change bitmap counting function to use hweight8() Better than shift counting. Signed-off-by: Charles Manning --- yaffs_bitmap.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/yaffs_bitmap.c b/yaffs_bitmap.c index 5d1cfb2..b254266 100644 --- 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; } -- 2.30.2