idle.c (2d8ad8719591fa803b0d589ed057fa46f49b7155) idle.c (771dae81896855d25f7f8746aaf56c0238deafb6)
1/*
2 * Idle daemon for PowerPC. Idle daemon will handle any action
3 * that needs to be taken when the system becomes idle.
4 *
5 * Originally written by Cort Dougan (cort@cs.nmt.edu).
6 * Subsequent 32-bit hacking by Tom Rini, Armin Kuster,
7 * Paul Mackerras and others.
8 *

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34#include <asm/smp.h>
35
36#ifdef CONFIG_HOTPLUG_CPU
37#define cpu_should_die() cpu_is_offline(smp_processor_id())
38#else
39#define cpu_should_die() 0
40#endif
41
1/*
2 * Idle daemon for PowerPC. Idle daemon will handle any action
3 * that needs to be taken when the system becomes idle.
4 *
5 * Originally written by Cort Dougan (cort@cs.nmt.edu).
6 * Subsequent 32-bit hacking by Tom Rini, Armin Kuster,
7 * Paul Mackerras and others.
8 *

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34#include <asm/smp.h>
35
36#ifdef CONFIG_HOTPLUG_CPU
37#define cpu_should_die() cpu_is_offline(smp_processor_id())
38#else
39#define cpu_should_die() 0
40#endif
41
42unsigned long cpuidle_disable = IDLE_NO_OVERRIDE;
43EXPORT_SYMBOL(cpuidle_disable);
44
42static int __init powersave_off(char *arg)
43{
44 ppc_md.power_save = NULL;
45static int __init powersave_off(char *arg)
46{
47 ppc_md.power_save = NULL;
48 cpuidle_disable = IDLE_POWERSAVE_OFF;
45 return 0;
46}
47__setup("powersave=off", powersave_off);
48
49/*
50 * The body of the idle task.
51 */
52void cpu_idle(void)

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97 preempt_enable_no_resched();
98 if (cpu_should_die())
99 cpu_die();
100 schedule();
101 preempt_disable();
102 }
103}
104
49 return 0;
50}
51__setup("powersave=off", powersave_off);
52
53/*
54 * The body of the idle task.
55 */
56void cpu_idle(void)

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101 preempt_enable_no_resched();
102 if (cpu_should_die())
103 cpu_die();
104 schedule();
105 preempt_disable();
106 }
107}
108
109
110/*
111 * cpu_idle_wait - Used to ensure that all the CPUs come out of the old
112 * idle loop and start using the new idle loop.
113 * Required while changing idle handler on SMP systems.
114 * Caller must have changed idle handler to the new value before the call.
115 * This window may be larger on shared systems.
116 */
117void cpu_idle_wait(void)
118{
119 int cpu;
120 smp_mb();
121
122 /* kick all the CPUs so that they exit out of old idle routine */
123 get_online_cpus();
124 for_each_online_cpu(cpu) {
125 if (cpu != smp_processor_id())
126 smp_send_reschedule(cpu);
127 }
128 put_online_cpus();
129}
130EXPORT_SYMBOL_GPL(cpu_idle_wait);
131
105int powersave_nap;
106
107#ifdef CONFIG_SYSCTL
108/*
109 * Register the sysctl to set/clear powersave_nap.
110 */
111static ctl_table powersave_nap_ctl_table[]={
112 {

--- 26 unchanged lines hidden --- 		132int powersave_nap;
133
134#ifdef CONFIG_SYSCTL
135/*
136 * Register the sysctl to set/clear powersave_nap.
137 */
138static ctl_table powersave_nap_ctl_table[]={
139 {

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