diff options
Diffstat (limited to 'fs/qnx4/bitmap.c')
| -rw-r--r-- | fs/qnx4/bitmap.c | 48 |
1 files changed, 6 insertions, 42 deletions
diff --git a/fs/qnx4/bitmap.c b/fs/qnx4/bitmap.c index 0afba069d56..76a7a697b77 100644 --- a/fs/qnx4/bitmap.c +++ b/fs/qnx4/bitmap.c @@ -17,45 +17,6 @@ #include <linux/bitops.h> #include "qnx4.h" -#if 0 -int qnx4_new_block(struct super_block *sb) -{ - return 0; -} -#endif /* 0 */ - -static void count_bits(register const char *bmPart, register int size, - int *const tf) -{ - char b; - int tot = *tf; - - if (size > QNX4_BLOCK_SIZE) { - size = QNX4_BLOCK_SIZE; - } - do { - b = *bmPart++; - if ((b & 1) == 0) - tot++; - if ((b & 2) == 0) - tot++; - if ((b & 4) == 0) - tot++; - if ((b & 8) == 0) - tot++; - if ((b & 16) == 0) - tot++; - if ((b & 32) == 0) - tot++; - if ((b & 64) == 0) - tot++; - if ((b & 128) == 0) - tot++; - size--; - } while (size != 0); - *tf = tot; -} - unsigned long qnx4_count_free_blocks(struct super_block *sb) { int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1; @@ -66,13 +27,16 @@ unsigned long qnx4_count_free_blocks(struct super_block *sb) struct buffer_head *bh; while (total < size) { + int bytes = min(size - total, QNX4_BLOCK_SIZE); + if ((bh = sb_bread(sb, start + offset)) == NULL) { - printk("qnx4: I/O error in counting free blocks\n"); + printk(KERN_ERR "qnx4: I/O error in counting free blocks\n"); break; } - count_bits(bh->b_data, size - total, &total_free); + total_free += bytes * BITS_PER_BYTE - + memweight(bh->b_data, bytes); brelse(bh); - total += QNX4_BLOCK_SIZE; + total += bytes; offset++; } |