/*
* 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>
* Chunk bitmap manipulations
*/
-static Y_INLINE u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk)
+static 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));
- YBUG();
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "BlockBits block %d is not valid",
+ blk);
+ BUG();
}
return dev->chunk_bits +
(dev->chunk_bit_stride * (blk - dev->internal_start_block));
{
if (blk < dev->internal_start_block || blk > dev->internal_end_block ||
chunk < 0 || chunk >= dev->param.chunks_per_block) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid" TENDSTR),
- blk, chunk));
- YBUG();
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "Chunk Id (%d:%d) invalid",
+ blk, chunk);
+ BUG();
}
}
u8 *blk_bits = yaffs_block_bits(dev, blk);
yaffs_verify_chunk_bit_id(dev, blk, chunk);
-
blk_bits[chunk / 8] &= ~(1 << (chunk & 7));
}
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;
}
{
u8 *blk_bits = yaffs_block_bits(dev, blk);
int i;
+
for (i = 0; i < dev->chunk_bit_stride; i++) {
if (*blk_bits)
return 1;
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;
}