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));
}
/*
* Check to see if the scheduling-clock interrupt came from an extended
* quiescent state, and, if so, tell RCU about it.
*/
void rcu_check_callbacks(int cpu, int user)
{
if (!rcu_needs_cpu(0))
return; /* RCU doesn't need anything to be done. */
if (user ||
(idle_cpu(cpu) &&
!in_softirq() &&
hardirq_count() <= (1 << HARDIRQ_SHIFT)))
rcu_qsctr_inc(cpu);
else if (!in_softirq())
rcu_bh_qsctr_inc(cpu);
}
asmlinkage void __do_softirq(void)
{
struct softirq_action *h;
__u32 pending;
int max_restart = MAX_SOFTIRQ_RESTART;
int cpu;
pending = local_softirq_pending();
account_system_vtime(current);
__local_bh_disable((unsigned long)__builtin_return_address(0));
trace_softirq_enter();
cpu = smp_processor_id();
restart:
/* Reset the pending bitmask before enabling irqs */
set_softirq_pending(0);
local_irq_enable();
h = softirq_vec;
do {
if (pending & 1) {
kstat_incr_softirqs_this_cpu(h - softirq_vec);
h->action(h);
rcu_bh_qsctr_inc(cpu);
}
h++;
pending >>= 1;
} while (pending);
local_irq_disable();
pending = local_softirq_pending();
if (pending && --max_restart)
goto restart;
if (pending)
wakeup_softirqd();
trace_softirq_exit();
account_system_vtime(current);
_local_bh_enable();
}
asmlinkage void __do_softirq(void)
{
struct softirq_action *h;
__u32 pending;
int max_restart = MAX_SOFTIRQ_RESTART;
int cpu;
pending = local_softirq_pending();
local_bh_disable();
cpu = smp_processor_id();
restart:
/* Reset the pending bitmask before enabling irqs */
set_softirq_pending(0);
local_irq_enable();
h = softirq_vec;
do {
if (pending & 1) {
trace_kernel_soft_irq_entry((void*)(h - softirq_vec));
h->action(h);
trace_kernel_soft_irq_exit((void*)(h - softirq_vec));
rcu_bh_qsctr_inc(cpu);
}
h++;
pending >>= 1;
} while (pending);
local_irq_disable();
pending = local_softirq_pending();
if (pending && --max_restart)
goto restart;
if (pending)
wakeup_softirqd();
__local_bh_enable();
}