-static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp,
- struct rcu_state *rsp, struct rcu_data *rdp)
-{
- if (rdp->curlist && !rcu_batch_before(rcp->completed, rdp->batch)) {
- *rdp->donetail = rdp->curlist;
- rdp->donetail = rdp->curtail;
- rdp->curlist = NULL;
- rdp->curtail = &rdp->curlist;
- }
-
- local_irq_disable();
- if (rdp->nxtlist && !rdp->curlist) {
- rdp->curlist = rdp->nxtlist;
- rdp->curtail = rdp->nxttail;
- rdp->nxtlist = NULL;
- rdp->nxttail = &rdp->nxtlist;
- local_irq_enable();
-
- /*
- * start the next batch of callbacks
- */
-
- /* determine batch number */
- rdp->batch = rcp->cur + 1;
- /* see the comment and corresponding wmb() in
- * the rcu_start_batch()
- */
- smp_rmb();
-
- if (!rcp->next_pending) {
- /* and start it/schedule start if it's a new batch */
- spin_lock(&rsp->lock);
- rcu_start_batch(rcp, rsp, 1);
- spin_unlock(&rsp->lock);
- }
- } else {
- local_irq_enable();
- }
- rcu_check_quiescent_state(rcp, rsp, rdp);
- if (rdp->donelist)
- rcu_do_batch(rdp);
-}
-
-static void rcu_process_callbacks(unsigned long unused)
-{
- __rcu_process_callbacks(&rcu_ctrlblk, &rcu_state,
- &__get_cpu_var(rcu_data));
- __rcu_process_callbacks(&rcu_bh_ctrlblk, &rcu_bh_state,
- &__get_cpu_var(rcu_bh_data));
-}
-
-void rcu_check_callbacks(int cpu, int user)
-{
- if (user ||
- (idle_cpu(cpu) && !in_softirq() &&
- hardirq_count() <= (1 << HARDIRQ_SHIFT))) {
- rcu_qsctr_inc(cpu);
- rcu_bh_qsctr_inc(cpu);
- } else if (!in_softirq())
- rcu_bh_qsctr_inc(cpu);
- tasklet_schedule(&per_cpu(rcu_tasklet, cpu));
-}
-
-static void rcu_init_percpu_data(int cpu, struct rcu_ctrlblk *rcp,
- struct rcu_data *rdp)
-{
- memset(rdp, 0, sizeof(*rdp));
- rdp->curtail = &rdp->curlist;
- rdp->nxttail = &rdp->nxtlist;
- rdp->donetail = &rdp->donelist;
- rdp->quiescbatch = rcp->completed;
- rdp->qs_pending = 0;
- rdp->cpu = cpu;
-}
-
-static void __devinit rcu_online_cpu(int cpu)