slsb
struct slsb slsb;
__state = q->slsb.val[bufnr];
if (q->slsb.val[bufnr] != __state)
WRITE_ONCE(q->slsb.val[bufnr], state);
q->slib->slsba = (unsigned long)&q->slsb.val[0];
desc->slsba = virt_to_dma64(&queue->slsb);