X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_bitmap.c;h=4440e930d6bcd802a282c79651d9c00b9643be5d;hp=6be9d26fae1ec58b3f0bd637f7e83ab878656560;hb=33308768bd24abe4e1f59c5025a3dd824119ae1d;hpb=5062df7307f71d3374da87a7c69102dc3f09da28

diff --git a/yaffs_bitmap.c b/yaffs_bitmap.c
index 6be9d26..4440e93 100644
--- a/yaffs_bitmap.c
+++ b/yaffs_bitmap.c
@@ -1,7 +1,7 @@
 /*
  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
  *
- * Copyright (C) 2002-2010 Aleph One Ltd.
+ * Copyright (C) 2002-2011 Aleph One Ltd.
  *   for Toby Churchill Ltd and Brightstar Engineering
  *
  * Created by Charles Manning <charles@aleph1.co.uk>
@@ -23,7 +23,7 @@ static inline u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk)
 		yaffs_trace(YAFFS_TRACE_ERROR,
 			"BlockBits block %d is not valid",
 			blk);
-		YBUG();
+		BUG();
 	}
 	return dev->chunk_bits +
 	    (dev->chunk_bit_stride * (blk - dev->internal_start_block));
@@ -36,7 +36,7 @@ void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk)
 		yaffs_trace(YAFFS_TRACE_ERROR,
 			"Chunk Id (%d:%d) invalid",
 			blk, chunk);
-		YBUG();
+		BUG();
 	}
 }
 
@@ -52,7 +52,6 @@ void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
 	u8 *blk_bits = yaffs_block_bits(dev, blk);
 
 	yaffs_verify_chunk_bit_id(dev, blk, chunk);
-
 	blk_bits[chunk / 8] &= ~(1 << (chunk & 7));
 }
 
@@ -61,15 +60,14 @@ void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
 	u8 *blk_bits = yaffs_block_bits(dev, blk);
 
 	yaffs_verify_chunk_bit_id(dev, blk, chunk);
-
 	blk_bits[chunk / 8] |= (1 << (chunk & 7));
 }
 
 int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
 {
 	u8 *blk_bits = yaffs_block_bits(dev, blk);
-	yaffs_verify_chunk_bit_id(dev, blk, chunk);
 
+	yaffs_verify_chunk_bit_id(dev, blk, chunk);
 	return (blk_bits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
 }
 
@@ -77,6 +75,7 @@ int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk)
 {
 	u8 *blk_bits = yaffs_block_bits(dev, blk);
 	int i;
+
 	for (i = 0; i < dev->chunk_bit_stride; i++) {
 		if (*blk_bits)
 			return 1;
@@ -90,15 +89,9 @@ 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;
 }