[linux-2.6-block.git] / include / linux / cpu.h

/*
 * include/linux/cpu.h - generic cpu definition
 *
 * This is mainly for topological representation. We define the 
 * basic 'struct cpu' here, which can be embedded in per-arch 
 * definitions of processors.
 *
 * Basic handling of the devices is done in drivers/base/cpu.c
 *
 * CPUs are exported via sysfs in the devices/system/cpu
 * directory. 
 */
#ifndef _LINUX_CPU_H_
#define _LINUX_CPU_H_

#include <linux/node.h>
#include <linux/compiler.h>
#include <linux/cpumask.h>
#include <linux/cpuhotplug.h>

struct device;
struct device_node;
struct attribute_group;

struct cpu {
	int node_id;		/* The node which contains the CPU */
	int hotpluggable;	/* creates sysfs control file if hotpluggable */
	struct device dev;
};

extern void boot_cpu_init(void);
extern void boot_cpu_state_init(void);

extern int register_cpu(struct cpu *cpu, int num);
extern struct device *get_cpu_device(unsigned cpu);
extern bool cpu_is_hotpluggable(unsigned cpu);
extern bool arch_match_cpu_phys_id(int cpu, u64 phys_id);
extern bool arch_find_n_match_cpu_physical_id(struct device_node *cpun,
					      int cpu, unsigned int *thread);

extern int cpu_add_dev_attr(struct device_attribute *attr);
extern void cpu_remove_dev_attr(struct device_attribute *attr);

extern int cpu_add_dev_attr_group(struct attribute_group *attrs);
extern void cpu_remove_dev_attr_group(struct attribute_group *attrs);

extern __printf(4, 5)
struct device *cpu_device_create(struct device *parent, void *drvdata,
				 const struct attribute_group **groups,
				 const char *fmt, ...);
#ifdef CONFIG_HOTPLUG_CPU
extern void unregister_cpu(struct cpu *cpu);
extern ssize_t arch_cpu_probe(const char *, size_t);
extern ssize_t arch_cpu_release(const char *, size_t);
#endif
struct notifier_block;

/*
 * CPU notifier priorities.
 */
enum {
	/*
	 * SCHED_ACTIVE marks a cpu which is coming up active during
	 * CPU_ONLINE and CPU_DOWN_FAILED and must be the first
	 * notifier.  CPUSET_ACTIVE adjusts cpuset according to
	 * cpu_active mask right after SCHED_ACTIVE.  During
	 * CPU_DOWN_PREPARE, SCHED_INACTIVE and CPUSET_INACTIVE are
	 * ordered in the similar way.
	 *
	 * This ordering guarantees consistent cpu_active mask and
	 * migration behavior to all cpu notifiers.
	 */
	CPU_PRI_SCHED_ACTIVE	= INT_MAX,
	CPU_PRI_CPUSET_ACTIVE	= INT_MAX - 1,
	CPU_PRI_SCHED_INACTIVE	= INT_MIN + 1,
	CPU_PRI_CPUSET_INACTIVE	= INT_MIN,

	/* migration should happen before other stuff but after perf */
	CPU_PRI_PERF		= 20,
	CPU_PRI_MIGRATION	= 10,

	/* bring up workqueues before normal notifiers and down after */
	CPU_PRI_WORKQUEUE_UP	= 5,
	CPU_PRI_WORKQUEUE_DOWN	= -5,
};

#define CPU_ONLINE		0x0002 /* CPU (unsigned)v is up */
#define CPU_UP_PREPARE		0x0003 /* CPU (unsigned)v coming up */
#define CPU_UP_CANCELED		0x0004 /* CPU (unsigned)v NOT coming up */
#define CPU_DOWN_PREPARE	0x0005 /* CPU (unsigned)v going down */
#define CPU_DOWN_FAILED		0x0006 /* CPU (unsigned)v NOT going down */
#define CPU_DEAD		0x0007 /* CPU (unsigned)v dead */
#define CPU_DYING		0x0008 /* CPU (unsigned)v not running any task,
					* not handling interrupts, soon dead.
					* Called on the dying cpu, interrupts
					* are already disabled. Must not
					* sleep, must not fail */
#define CPU_POST_DEAD		0x0009 /* CPU (unsigned)v dead, cpu_hotplug
					* lock is dropped */
#define CPU_STARTING		0x000A /* CPU (unsigned)v soon running.
					* Called on the new cpu, just before
					* enabling interrupts. Must not sleep,
					* must not fail */
#define CPU_BROKEN		0x000B /* CPU (unsigned)v did not die properly,
					* perhaps due to preemption. */

/* Used for CPU hotplug events occurring while tasks are frozen due to a suspend
 * operation in progress
 */
#define CPU_TASKS_FROZEN	0x0010

#define CPU_ONLINE_FROZEN	(CPU_ONLINE | CPU_TASKS_FROZEN)
#define CPU_UP_PREPARE_FROZEN	(CPU_UP_PREPARE | CPU_TASKS_FROZEN)
#define CPU_UP_CANCELED_FROZEN	(CPU_UP_CANCELED | CPU_TASKS_FROZEN)
#define CPU_DOWN_PREPARE_FROZEN	(CPU_DOWN_PREPARE | CPU_TASKS_FROZEN)
#define CPU_DOWN_FAILED_FROZEN	(CPU_DOWN_FAILED | CPU_TASKS_FROZEN)
#define CPU_DEAD_FROZEN		(CPU_DEAD | CPU_TASKS_FROZEN)
#define CPU_DYING_FROZEN	(CPU_DYING | CPU_TASKS_FROZEN)
#define CPU_STARTING_FROZEN	(CPU_STARTING | CPU_TASKS_FROZEN)


#ifdef CONFIG_SMP
extern bool cpuhp_tasks_frozen;
/* Need to know about CPUs going up/down? */
#if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE)
#define cpu_notifier(fn, pri) {					\
	static struct notifier_block fn##_nb =			\
		{ .notifier_call = fn, .priority = pri };	\
	register_cpu_notifier(&fn##_nb);			\
}

#define __cpu_notifier(fn, pri) {				\
	static struct notifier_block fn##_nb =			\
		{ .notifier_call = fn, .priority = pri };	\
	__register_cpu_notifier(&fn##_nb);			\
}
#else /* #if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE) */
#define cpu_notifier(fn, pri)	do { (void)(fn); } while (0)
#define __cpu_notifier(fn, pri)	do { (void)(fn); } while (0)
#endif /* #else #if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE) */

#ifdef CONFIG_HOTPLUG_CPU
extern int register_cpu_notifier(struct notifier_block *nb);
extern int __register_cpu_notifier(struct notifier_block *nb);
extern void unregister_cpu_notifier(struct notifier_block *nb);
extern void __unregister_cpu_notifier(struct notifier_block *nb);
#else

#ifndef MODULE
extern int register_cpu_notifier(struct notifier_block *nb);
extern int __register_cpu_notifier(struct notifier_block *nb);
#else
static inline int register_cpu_notifier(struct notifier_block *nb)
{
	return 0;
}

static inline int __register_cpu_notifier(struct notifier_block *nb)
{
	return 0;
}
#endif

static inline void unregister_cpu_notifier(struct notifier_block *nb)
{
}

static inline void __unregister_cpu_notifier(struct notifier_block *nb)
{
}
#endif

int cpu_up(unsigned int cpu);
void notify_cpu_starting(unsigned int cpu);
extern void cpu_maps_update_begin(void);
extern void cpu_maps_update_done(void);

#define cpu_notifier_register_begin	cpu_maps_update_begin
#define cpu_notifier_register_done	cpu_maps_update_done

#else	/* CONFIG_SMP */
#define cpuhp_tasks_frozen	0

#define cpu_notifier(fn, pri)	do { (void)(fn); } while (0)
#define __cpu_notifier(fn, pri)	do { (void)(fn); } while (0)

static inline int register_cpu_notifier(struct notifier_block *nb)
{
	return 0;
}

static inline int __register_cpu_notifier(struct notifier_block *nb)
{
	return 0;
}

static inline void unregister_cpu_notifier(struct notifier_block *nb)
{
}

static inline void __unregister_cpu_notifier(struct notifier_block *nb)
{
}

static inline void cpu_maps_update_begin(void)
{
}

static inline void cpu_maps_update_done(void)
{
}

static inline void cpu_notifier_register_begin(void)
{
}

static inline void cpu_notifier_register_done(void)
{
}

#endif /* CONFIG_SMP */
extern struct bus_type cpu_subsys;

#ifdef CONFIG_HOTPLUG_CPU
/* Stop CPUs going up and down. */

extern void cpu_hotplug_begin(void);
extern void cpu_hotplug_done(void);
extern void get_online_cpus(void);
extern void put_online_cpus(void);
extern void cpu_hotplug_disable(void);
extern void cpu_hotplug_enable(void);
#define hotcpu_notifier(fn, pri)	cpu_notifier(fn, pri)
#define __hotcpu_notifier(fn, pri)	__cpu_notifier(fn, pri)
#define register_hotcpu_notifier(nb)	register_cpu_notifier(nb)
#define __register_hotcpu_notifier(nb)	__register_cpu_notifier(nb)
#define unregister_hotcpu_notifier(nb)	unregister_cpu_notifier(nb)
#define __unregister_hotcpu_notifier(nb)	__unregister_cpu_notifier(nb)
void clear_tasks_mm_cpumask(int cpu);
int cpu_down(unsigned int cpu);

#else		/* CONFIG_HOTPLUG_CPU */

static inline void cpu_hotplug_begin(void) {}
static inline void cpu_hotplug_done(void) {}
#define get_online_cpus()	do { } while (0)
#define put_online_cpus()	do { } while (0)
#define cpu_hotplug_disable()	do { } while (0)
#define cpu_hotplug_enable()	do { } while (0)
#define hotcpu_notifier(fn, pri)	do { (void)(fn); } while (0)
#define __hotcpu_notifier(fn, pri)	do { (void)(fn); } while (0)
/* These aren't inline functions due to a GCC bug. */
#define register_hotcpu_notifier(nb)	({ (void)(nb); 0; })
#define __register_hotcpu_notifier(nb)	({ (void)(nb); 0; })
#define unregister_hotcpu_notifier(nb)	({ (void)(nb); })
#define __unregister_hotcpu_notifier(nb)	({ (void)(nb); })
#endif		/* CONFIG_HOTPLUG_CPU */

#ifdef CONFIG_PM_SLEEP_SMP
extern int disable_nonboot_cpus(void);
extern void enable_nonboot_cpus(void);
#else /* !CONFIG_PM_SLEEP_SMP */
static inline int disable_nonboot_cpus(void) { return 0; }
static inline void enable_nonboot_cpus(void) {}
#endif /* !CONFIG_PM_SLEEP_SMP */

void cpu_startup_entry(enum cpuhp_state state);

void cpu_idle_poll_ctrl(bool enable);

void arch_cpu_idle(void);
void arch_cpu_idle_prepare(void);
void arch_cpu_idle_enter(void);
void arch_cpu_idle_exit(void);
void arch_cpu_idle_dead(void);

int cpu_report_state(int cpu);
int cpu_check_up_prepare(int cpu);
void cpu_set_state_online(int cpu);
#ifdef CONFIG_HOTPLUG_CPU
bool cpu_wait_death(unsigned int cpu, int seconds);
bool cpu_report_death(void);
void cpuhp_report_idle_dead(void);
#else
static inline void cpuhp_report_idle_dead(void) { }
#endif /* #ifdef CONFIG_HOTPLUG_CPU */

#endif /* _LINUX_CPU_H_ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* include/linux/cpu.h - generic cpu definition
	3	*
	4	* This is mainly for topological representation. We define the
	5	* basic 'struct cpu' here, which can be embedded in per-arch
	6	* definitions of processors.
	7	*
	8	* Basic handling of the devices is done in drivers/base/cpu.c
1da177e4	9	*
611a75e1	10	* CPUs are exported via sysfs in the devices/system/cpu
1da177e4	11	* directory.
1da177e4 LT	12	*/
	13	#ifndef _LINUX_CPU_H_
	14	#define _LINUX_CPU_H_
	15
1da177e4 LT	16	#include <linux/node.h>
	17	#include <linux/compiler.h>
	18	#include <linux/cpumask.h>
cff7d378	19	#include <linux/cpuhotplug.h>
1da177e4	20
313162d0	21	struct device;
d1cb9d1a	22	struct device_node;
3d52943b	23	struct attribute_group;
313162d0	24
1da177e4 LT	25	struct cpu {
1da177e4 LT	26	int node_id; /* The node which contains the CPU */
72486f1f	27	int hotpluggable; /* creates sysfs control file if hotpluggable */
8a25a2fd	28	struct device dev;
1da177e4 LT	29	};
1da177e4 LT	30
cff7d378 TG	31	extern void boot_cpu_init(void);
	32	extern void boot_cpu_state_init(void);
	33
76b67ed9	34	extern int register_cpu(struct cpu *cpu, int num);
8a25a2fd	35	extern struct device *get_cpu_device(unsigned cpu);
2987557f	36	extern bool cpu_is_hotpluggable(unsigned cpu);
183912d3	37	extern bool arch_match_cpu_phys_id(int cpu, u64 phys_id);
d1cb9d1a DM	38	extern bool arch_find_n_match_cpu_physical_id(struct device_node *cpun,
d1cb9d1a DM	39	int cpu, unsigned int *thread);
0344c6c5	40
8a25a2fd KS	41	extern int cpu_add_dev_attr(struct device_attribute *attr);
8a25a2fd KS	42	extern void cpu_remove_dev_attr(struct device_attribute *attr);
0344c6c5	43
8a25a2fd KS	44	extern int cpu_add_dev_attr_group(struct attribute_group *attrs);
8a25a2fd KS	45	extern void cpu_remove_dev_attr_group(struct attribute_group *attrs);
0344c6c5	46
8db14860 NI	47	extern __printf(4, 5)
	48	struct device cpu_device_create(struct device parent, void *drvdata,
	49	const struct attribute_group **groups,
	50	const char *fmt, ...);
1da177e4	51	#ifdef CONFIG_HOTPLUG_CPU
76b67ed9	52	extern void unregister_cpu(struct cpu *cpu);
12633e80 NF	53	extern ssize_t arch_cpu_probe(const char *, size_t);
12633e80 NF	54	extern ssize_t arch_cpu_release(const char *, size_t);
1da177e4 LT	55	#endif
	56	struct notifier_block;
	57
50a323b7 TH	58	/*
	59	* CPU notifier priorities.
	60	*/
	61	enum {
3a101d05 TH	62	/*
	63	* SCHED_ACTIVE marks a cpu which is coming up active during
	64	* CPU_ONLINE and CPU_DOWN_FAILED and must be the first
	65	* notifier. CPUSET_ACTIVE adjusts cpuset according to
	66	* cpu_active mask right after SCHED_ACTIVE. During
	67	* CPU_DOWN_PREPARE, SCHED_INACTIVE and CPUSET_INACTIVE are
	68	* ordered in the similar way.
	69	*
	70	* This ordering guarantees consistent cpu_active mask and
	71	* migration behavior to all cpu notifiers.
	72	*/
	73	CPU_PRI_SCHED_ACTIVE = INT_MAX,
	74	CPU_PRI_CPUSET_ACTIVE = INT_MAX - 1,
	75	CPU_PRI_SCHED_INACTIVE = INT_MIN + 1,
	76	CPU_PRI_CPUSET_INACTIVE = INT_MIN,
	77
50a323b7 TH	78	/* migration should happen before other stuff but after perf */
	79	CPU_PRI_PERF = 20,
	80	CPU_PRI_MIGRATION = 10,
931ef163	81
65758202 TH	82	/* bring up workqueues before normal notifiers and down after */
	83	CPU_PRI_WORKQUEUE_UP = 5,
	84	CPU_PRI_WORKQUEUE_DOWN = -5,
50a323b7 TH	85	};
50a323b7 TH	86
80f1ff97 AW	87	#define CPU_ONLINE 0x0002 /* CPU (unsigned)v is up */
	88	#define CPU_UP_PREPARE 0x0003 /* CPU (unsigned)v coming up */
	89	#define CPU_UP_CANCELED 0x0004 /* CPU (unsigned)v NOT coming up */
	90	#define CPU_DOWN_PREPARE 0x0005 /* CPU (unsigned)v going down */
	91	#define CPU_DOWN_FAILED 0x0006 /* CPU (unsigned)v NOT going down */
	92	#define CPU_DEAD 0x0007 /* CPU (unsigned)v dead */
	93	#define CPU_DYING 0x0008 /* CPU (unsigned)v not running any task,
	94	* not handling interrupts, soon dead.
	95	* Called on the dying cpu, interrupts
	96	* are already disabled. Must not
	97	* sleep, must not fail */
	98	#define CPU_POST_DEAD 0x0009 /* CPU (unsigned)v dead, cpu_hotplug
	99	* lock is dropped */
	100	#define CPU_STARTING 0x000A /* CPU (unsigned)v soon running.
	101	* Called on the new cpu, just before
	102	* enabling interrupts. Must not sleep,
	103	* must not fail */
27d50c7e	104	#define CPU_BROKEN 0x000B /* CPU (unsigned)v did not die properly,
8038dad7	105	* perhaps due to preemption. */
80f1ff97 AW	106
	107	/* Used for CPU hotplug events occurring while tasks are frozen due to a suspend
	108	* operation in progress
	109	*/
	110	#define CPU_TASKS_FROZEN 0x0010
	111
	112	#define CPU_ONLINE_FROZEN (CPU_ONLINE \| CPU_TASKS_FROZEN)
	113	#define CPU_UP_PREPARE_FROZEN (CPU_UP_PREPARE \| CPU_TASKS_FROZEN)
	114	#define CPU_UP_CANCELED_FROZEN (CPU_UP_CANCELED \| CPU_TASKS_FROZEN)
	115	#define CPU_DOWN_PREPARE_FROZEN (CPU_DOWN_PREPARE \| CPU_TASKS_FROZEN)
	116	#define CPU_DOWN_FAILED_FROZEN (CPU_DOWN_FAILED \| CPU_TASKS_FROZEN)
	117	#define CPU_DEAD_FROZEN (CPU_DEAD \| CPU_TASKS_FROZEN)
	118	#define CPU_DYING_FROZEN (CPU_DYING \| CPU_TASKS_FROZEN)
	119	#define CPU_STARTING_FROZEN (CPU_STARTING \| CPU_TASKS_FROZEN)
	120
	121
1da177e4	122	#ifdef CONFIG_SMP
090e77c3	123	extern bool cpuhp_tasks_frozen;
1da177e4	124	/* Need to know about CPUs going up/down? */
799e64f0 PM	125	#if defined(CONFIG_HOTPLUG_CPU) \|\| !defined(MODULE)
799e64f0 PM	126	#define cpu_notifier(fn, pri) { \
0db0628d	127	static struct notifier_block fn##_nb = \
799e64f0 PM	128	{ .notifier_call = fn, .priority = pri }; \
	129	register_cpu_notifier(&fn##_nb); \
	130	}
93ae4f97 SB	131
	132	#define __cpu_notifier(fn, pri) { \
	133	static struct notifier_block fn##_nb = \
	134	{ .notifier_call = fn, .priority = pri }; \
	135	__register_cpu_notifier(&fn##_nb); \
	136	}
799e64f0 PM	137	#else /* #if defined(CONFIG_HOTPLUG_CPU) \|\| !defined(MODULE) */
799e64f0 PM	138	#define cpu_notifier(fn, pri) do { (void)(fn); } while (0)
93ae4f97	139	#define __cpu_notifier(fn, pri) do { (void)(fn); } while (0)
799e64f0	140	#endif /* #else #if defined(CONFIG_HOTPLUG_CPU) \|\| !defined(MODULE) */
93ae4f97	141
65edc68c	142	#ifdef CONFIG_HOTPLUG_CPU
47e627bc	143	extern int register_cpu_notifier(struct notifier_block *nb);
93ae4f97	144	extern int __register_cpu_notifier(struct notifier_block *nb);
1da177e4	145	extern void unregister_cpu_notifier(struct notifier_block *nb);
93ae4f97	146	extern void __unregister_cpu_notifier(struct notifier_block *nb);
65edc68c	147	#else
47e627bc AK	148
	149	#ifndef MODULE
	150	extern int register_cpu_notifier(struct notifier_block *nb);
93ae4f97	151	extern int __register_cpu_notifier(struct notifier_block *nb);
47e627bc AK	152	#else
	153	static inline int register_cpu_notifier(struct notifier_block *nb)
	154	{
	155	return 0;
	156	}
93ae4f97 SB	157
	158	static inline int __register_cpu_notifier(struct notifier_block *nb)
	159	{
	160	return 0;
	161	}
47e627bc AK	162	#endif
47e627bc AK	163
65edc68c CS	164	static inline void unregister_cpu_notifier(struct notifier_block *nb)
	165	{
	166	}
93ae4f97 SB	167
	168	static inline void __unregister_cpu_notifier(struct notifier_block *nb)
	169	{
	170	}
65edc68c	171	#endif
1da177e4 LT	172
1da177e4 LT	173	int cpu_up(unsigned int cpu);
e545a614	174	void notify_cpu_starting(unsigned int cpu);
3da1c84c ON	175	extern void cpu_maps_update_begin(void);
3da1c84c ON	176	extern void cpu_maps_update_done(void);
d0d23b54	177
93ae4f97 SB	178	#define cpu_notifier_register_begin cpu_maps_update_begin
	179	#define cpu_notifier_register_done cpu_maps_update_done
	180
3da1c84c	181	#else /* CONFIG_SMP */
090e77c3	182	#define cpuhp_tasks_frozen 0
1da177e4	183
799e64f0	184	#define cpu_notifier(fn, pri) do { (void)(fn); } while (0)
93ae4f97	185	#define __cpu_notifier(fn, pri) do { (void)(fn); } while (0)
799e64f0	186
1da177e4 LT	187	static inline int register_cpu_notifier(struct notifier_block *nb)
	188	{
	189	return 0;
	190	}
d0d23b54	191
93ae4f97 SB	192	static inline int __register_cpu_notifier(struct notifier_block *nb)
	193	{
	194	return 0;
	195	}
	196
1da177e4 LT	197	static inline void unregister_cpu_notifier(struct notifier_block *nb)
	198	{
	199	}
	200
93ae4f97 SB	201	static inline void __unregister_cpu_notifier(struct notifier_block *nb)
	202	{
	203	}
	204
3da1c84c ON	205	static inline void cpu_maps_update_begin(void)
	206	{
	207	}
	208
	209	static inline void cpu_maps_update_done(void)
	210	{
	211	}
	212
93ae4f97 SB	213	static inline void cpu_notifier_register_begin(void)
	214	{
	215	}
	216
	217	static inline void cpu_notifier_register_done(void)
	218	{
	219	}
	220
1da177e4	221	#endif /* CONFIG_SMP */
8a25a2fd	222	extern struct bus_type cpu_subsys;
1da177e4 LT	223
	224	#ifdef CONFIG_HOTPLUG_CPU
	225	/* Stop CPUs going up and down. */
f7dff2b1	226
b9d10be7 TK	227	extern void cpu_hotplug_begin(void);
b9d10be7 TK	228	extern void cpu_hotplug_done(void);
86ef5c9a GS	229	extern void get_online_cpus(void);
86ef5c9a GS	230	extern void put_online_cpus(void);
16e53dbf SB	231	extern void cpu_hotplug_disable(void);
16e53dbf SB	232	extern void cpu_hotplug_enable(void);
799e64f0	233	#define hotcpu_notifier(fn, pri) cpu_notifier(fn, pri)
93ae4f97	234	#define __hotcpu_notifier(fn, pri) __cpu_notifier(fn, pri)
39f4885c	235	#define register_hotcpu_notifier(nb) register_cpu_notifier(nb)
93ae4f97	236	#define __register_hotcpu_notifier(nb) __register_cpu_notifier(nb)
39f4885c	237	#define unregister_hotcpu_notifier(nb) unregister_cpu_notifier(nb)
93ae4f97	238	#define __unregister_hotcpu_notifier(nb) __unregister_cpu_notifier(nb)
cb79295e	239	void clear_tasks_mm_cpumask(int cpu);
1da177e4	240	int cpu_down(unsigned int cpu);
f7dff2b1 GS	241
	242	#else /* CONFIG_HOTPLUG_CPU */
	243
b9d10be7 TK	244	static inline void cpu_hotplug_begin(void) {}
b9d10be7 TK	245	static inline void cpu_hotplug_done(void) {}
86ef5c9a GS	246	#define get_online_cpus() do { } while (0)
86ef5c9a GS	247	#define put_online_cpus() do { } while (0)
16e53dbf SB	248	#define cpu_hotplug_disable() do { } while (0)
16e53dbf SB	249	#define cpu_hotplug_enable() do { } while (0)
02316067	250	#define hotcpu_notifier(fn, pri) do { (void)(fn); } while (0)
93ae4f97	251	#define __hotcpu_notifier(fn, pri) do { (void)(fn); } while (0)
761bb431 SS	252	/* These aren't inline functions due to a GCC bug. */
761bb431 SS	253	#define register_hotcpu_notifier(nb) ({ (void)(nb); 0; })
93ae4f97	254	#define __register_hotcpu_notifier(nb) ({ (void)(nb); 0; })
761bb431	255	#define unregister_hotcpu_notifier(nb) ({ (void)(nb); })
93ae4f97	256	#define __unregister_hotcpu_notifier(nb) ({ (void)(nb); })
f7dff2b1	257	#endif /* CONFIG_HOTPLUG_CPU */
1da177e4	258
f3de4be9	259	#ifdef CONFIG_PM_SLEEP_SMP
e3920fb4 RW	260	extern int disable_nonboot_cpus(void);
e3920fb4 RW	261	extern void enable_nonboot_cpus(void);
f3de4be9	262	#else /* !CONFIG_PM_SLEEP_SMP */
e3920fb4 RW	263	static inline int disable_nonboot_cpus(void) { return 0; }
e3920fb4 RW	264	static inline void enable_nonboot_cpus(void) {}
f3de4be9	265	#endif /* !CONFIG_PM_SLEEP_SMP */
e3920fb4	266
a1a04ec3	267	void cpu_startup_entry(enum cpuhp_state state);
a1a04ec3	268
d1669912 TG	269	void cpu_idle_poll_ctrl(bool enable);
	270
	271	void arch_cpu_idle(void);
	272	void arch_cpu_idle_prepare(void);
	273	void arch_cpu_idle_enter(void);
	274	void arch_cpu_idle_exit(void);
	275	void arch_cpu_idle_dead(void);
	276
8038dad7 PM	277	int cpu_report_state(int cpu);
	278	int cpu_check_up_prepare(int cpu);
	279	void cpu_set_state_online(int cpu);
	280	#ifdef CONFIG_HOTPLUG_CPU
	281	bool cpu_wait_death(unsigned int cpu, int seconds);
	282	bool cpu_report_death(void);
e69aab13 TG	283	void cpuhp_report_idle_dead(void);
	284	#else
	285	static inline void cpuhp_report_idle_dead(void) { }
8038dad7 PM	286	#endif /* #ifdef CONFIG_HOTPLUG_CPU */
8038dad7 PM	287
1da177e4	288	#endif /* _LINUX_CPU_H_ */