block_t
block_t *b;
block_t *b;
block_t *head;
block_t *tail;
block_t *next;
enqt(blockhdr_t *h, block_t *b)
static block_t *
block_t *b = h->head;
block_t *b;
b = Zalloc(sizeof (block_t));
static block_t *
block_t *b;