bcache_insert
bcache_insert(buf + (i * bcache_blksize),blk + i);
bcache_insert(p_buf + (j * bcache_blksize), p_blk + j);
bcache_insert(p_buf + (j * bcache_blksize), p_blk + j);
static void bcache_insert(void *buf, daddr_t blkno);