diff options
Diffstat (limited to 'target/linux/generic/files/fs/yaffs2/yaffs_bitmap.c')
| -rw-r--r-- | target/linux/generic/files/fs/yaffs2/yaffs_bitmap.c | 82 |
1 files changed, 37 insertions, 45 deletions
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_bitmap.c b/target/linux/generic/files/fs/yaffs2/yaffs_bitmap.c index 1769e9b47e..4440e930d6 100644 --- a/target/linux/generic/files/fs/yaffs2/yaffs_bitmap.c +++ b/target/linux/generic/files/fs/yaffs2/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> @@ -17,89 +17,81 @@ * Chunk bitmap manipulations */ -static Y_INLINE __u8 *yaffs_BlockBits(yaffs_dev_t *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)); + (dev->chunk_bit_stride * (blk - dev->internal_start_block)); } -void yaffs_verify_chunk_bit_id(yaffs_dev_t *dev, int blk, int chunk) +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) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR), - blk, chunk)); - YBUG(); + chunk < 0 || chunk >= dev->param.chunks_per_block) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Chunk Id (%d:%d) invalid", + blk, chunk); + BUG(); } } -void yaffs_clear_chunk_bits(yaffs_dev_t *dev, int blk) +void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk) { - __u8 *blkBits = yaffs_BlockBits(dev, blk); + u8 *blk_bits = yaffs_block_bits(dev, blk); - memset(blkBits, 0, dev->chunk_bit_stride); + memset(blk_bits, 0, dev->chunk_bit_stride); } -void yaffs_clear_chunk_bit(yaffs_dev_t *dev, int blk, int chunk) +void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) { - __u8 *blkBits = yaffs_BlockBits(dev, blk); + u8 *blk_bits = yaffs_block_bits(dev, blk); yaffs_verify_chunk_bit_id(dev, blk, chunk); - - blkBits[chunk / 8] &= ~(1 << (chunk & 7)); + blk_bits[chunk / 8] &= ~(1 << (chunk & 7)); } -void yaffs_set_chunk_bit(yaffs_dev_t *dev, int blk, int chunk) +void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) { - __u8 *blkBits = yaffs_BlockBits(dev, blk); + u8 *blk_bits = yaffs_block_bits(dev, blk); yaffs_verify_chunk_bit_id(dev, blk, chunk); - - blkBits[chunk / 8] |= (1 << (chunk & 7)); + blk_bits[chunk / 8] |= (1 << (chunk & 7)); } -int yaffs_check_chunk_bit(yaffs_dev_t *dev, int blk, int chunk) +int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) { - __u8 *blkBits = yaffs_BlockBits(dev, blk); - yaffs_verify_chunk_bit_id(dev, blk, chunk); + u8 *blk_bits = yaffs_block_bits(dev, blk); - return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; + yaffs_verify_chunk_bit_id(dev, blk, chunk); + return (blk_bits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; } -int yaffs_still_some_chunks(yaffs_dev_t *dev, int blk) +int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk) { - __u8 *blkBits = yaffs_BlockBits(dev, blk); + u8 *blk_bits = yaffs_block_bits(dev, blk); int i; + for (i = 0; i < dev->chunk_bit_stride; i++) { - if (*blkBits) + if (*blk_bits) return 1; - blkBits++; + blk_bits++; } return 0; } -int yaffs_count_chunk_bits(yaffs_dev_t *dev, int blk) +int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk) { - __u8 *blkBits = yaffs_BlockBits(dev, 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 = *blkBits; - while (x) { - if (x & 1) - n++; - x >>= 1; - } - - blkBits++; - } + + for (i = 0; i < dev->chunk_bit_stride; i++, blk_bits++) + n += hweight8(*blk_bits); + return n; } - |