/*
* The idle thread. There's no useful work to be done, so just try to conserve
* power and have a low exit latency (ie sit in a loop waiting for somebody to
* say that they'd like to reschedule)
*/
void __noreturn cpu_idle(void)
{
int cpu;
/* CPU is going idle. */
cpu = smp_processor_id();
/* endless idle loop with no priority at all */
while (1) {
tick_nohz_stop_sched_tick(1);
while (!need_resched() && cpu_online(cpu)) {
#ifdef CONFIG_MIPS_MT_SMTC
extern void smtc_idle_loop_hook(void);
smtc_idle_loop_hook();
#endif
if (cpu_wait)
(*cpu_wait)();
}
#ifdef CONFIG_HOTPLUG_CPU
if (!cpu_online(cpu) && !cpu_isset(cpu, cpu_callin_map) &&
(system_state == SYSTEM_RUNNING ||
system_state == SYSTEM_BOOTING))
play_dead();
#endif
tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
schedule();
preempt_disable();
}
}
void arch_cpu_idle(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
extern void smtc_idle_loop_hook(void);
smtc_idle_loop_hook();
#endif
if (cpu_wait)
(*cpu_wait)();
else
local_irq_enable();
}
/*
* The idle thread. There's no useful work to be done, so just try to conserve
* power and have a low exit latency (ie sit in a loop waiting for somebody to
* say that they'd like to reschedule)
*/
ATTRIB_NORET void cpu_idle(void)
{
/* endless idle loop with no priority at all */
while (1) {
while (!need_resched()) {
#ifdef CONFIG_MIPS_MT_SMTC
smtc_idle_loop_hook();
#endif /* CONFIG_MIPS_MT_SMTC */
if (cpu_wait)
(*cpu_wait)();
}
preempt_enable_no_resched();
schedule();
preempt_disable();
}
}
/*
* The idle thread. There's no useful work to be done, so just try to conserve
* power and have a low exit latency (ie sit in a loop waiting for somebody to
* say that they'd like to reschedule)
*/
void __noreturn cpu_idle(void)
{
/* endless idle loop with no priority at all */
while (1) {
while (!need_resched()) {
#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
extern void smtc_idle_loop_hook(void);
smtc_idle_loop_hook();
#endif
if (cpu_wait)
(*cpu_wait)();
}
preempt_enable_no_resched();
schedule();
preempt_disable();
}
}
/*
* The idle thread. There's no useful work to be done, so just try to conserve
* power and have a low exit latency (ie sit in a loop waiting for somebody to
* say that they'd like to reschedule)
*/
void __noreturn cpu_idle(void)
{
/* endless idle loop with no priority at all */
while (1) {
tick_nohz_stop_sched_tick(1);
while (!need_resched()) {
#ifdef CONFIG_MIPS_MT_SMTC
extern void smtc_idle_loop_hook(void);
smtc_idle_loop_hook();
#endif
if (cpu_wait)
(*cpu_wait)();
}
tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
schedule();
preempt_disable();
}
}
/*
* The idle thread. There's no useful work to be done, so just try to conserve
* power and have a low exit latency (ie sit in a loop waiting for somebody to
* say that they'd like to reschedule)
*/
ATTRIB_NORET void cpu_idle(void)
{
/* endless idle loop with no priority at all */
while (1) {
while (!need_resched()) {
#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
extern void smtc_idle_loop_hook(void);
smtc_idle_loop_hook();
#endif
#ifdef CONFIG_HOTPLUG_CPU
if (cpu_is_offline(smp_processor_id()))
cpu_die();
#endif
if (cpu_wait)
(*cpu_wait)();
}
preempt_enable_no_resched();
schedule();
preempt_disable();
}
}
/*
* The idle thread. There's no useful work to be done, so just try to conserve
* power and have a low exit latency (ie sit in a loop waiting for somebody to
* say that they'd like to reschedule)
*/
void __noreturn cpu_idle(void)
{
int cpu;
/* CPU is going idle. */
cpu = smp_processor_id();
/* endless idle loop with no priority at all */
while (1) {
tick_nohz_idle_enter();
rcu_idle_enter();
while (!need_resched() && cpu_online(cpu)) {
#ifdef CONFIG_MIPS_MT_SMTC
extern void smtc_idle_loop_hook(void);
smtc_idle_loop_hook();
#endif
if (cpu_wait) {
/* Don't trace irqs off for idle */
stop_critical_timings();
(*cpu_wait)();
start_critical_timings();
}
}
#ifdef CONFIG_HOTPLUG_CPU
if (!cpu_online(cpu) && !cpu_isset(cpu, cpu_callin_map) &&
(system_state == SYSTEM_RUNNING ||
system_state == SYSTEM_BOOTING))
play_dead();
#endif
rcu_idle_exit();
tick_nohz_idle_exit();
schedule_preempt_disabled();
}
}
