HFS_SECTOR_SIZE_BITS
__start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\
while (sect & ((size - 1) >> HFS_SECTOR_SIZE_BITS))
(sb->s_blocksize_bits - HFS_SECTOR_SIZE_BITS);
off = (loff_t)block << HFS_SECTOR_SIZE_BITS;
off = (block << HFS_SECTOR_SIZE_BITS) & (sb->s_blocksize - 1);
block >>= sb->s_blocksize_bits - HFS_SECTOR_SIZE_BITS;
#define HFSPLUS_SECTOR_SHIFT HFS_SECTOR_SIZE_BITS