[deliverable/linux.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 {
	CPU_PRI_PERF		= 20,

	/* 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 {
50a323b7	62	CPU_PRI_PERF = 20,
931ef163	63
65758202 TH	64	/* bring up workqueues before normal notifiers and down after */
	65	CPU_PRI_WORKQUEUE_UP = 5,
	66	CPU_PRI_WORKQUEUE_DOWN = -5,
50a323b7 TH	67	};
50a323b7 TH	68
80f1ff97 AW	69	#define CPU_ONLINE 0x0002 /* CPU (unsigned)v is up */
	70	#define CPU_UP_PREPARE 0x0003 /* CPU (unsigned)v coming up */
	71	#define CPU_UP_CANCELED 0x0004 /* CPU (unsigned)v NOT coming up */
	72	#define CPU_DOWN_PREPARE 0x0005 /* CPU (unsigned)v going down */
	73	#define CPU_DOWN_FAILED 0x0006 /* CPU (unsigned)v NOT going down */
	74	#define CPU_DEAD 0x0007 /* CPU (unsigned)v dead */
	75	#define CPU_DYING 0x0008 /* CPU (unsigned)v not running any task,
	76	* not handling interrupts, soon dead.
	77	* Called on the dying cpu, interrupts
	78	* are already disabled. Must not
	79	* sleep, must not fail */
	80	#define CPU_POST_DEAD 0x0009 /* CPU (unsigned)v dead, cpu_hotplug
	81	* lock is dropped */
	82	#define CPU_STARTING 0x000A /* CPU (unsigned)v soon running.
	83	* Called on the new cpu, just before
	84	* enabling interrupts. Must not sleep,
	85	* must not fail */
27d50c7e	86	#define CPU_BROKEN 0x000B /* CPU (unsigned)v did not die properly,
8038dad7	87	* perhaps due to preemption. */
80f1ff97 AW	88
	89	/* Used for CPU hotplug events occurring while tasks are frozen due to a suspend
	90	* operation in progress
	91	*/
	92	#define CPU_TASKS_FROZEN 0x0010
	93
	94	#define CPU_ONLINE_FROZEN (CPU_ONLINE \| CPU_TASKS_FROZEN)
	95	#define CPU_UP_PREPARE_FROZEN (CPU_UP_PREPARE \| CPU_TASKS_FROZEN)
	96	#define CPU_UP_CANCELED_FROZEN (CPU_UP_CANCELED \| CPU_TASKS_FROZEN)
	97	#define CPU_DOWN_PREPARE_FROZEN (CPU_DOWN_PREPARE \| CPU_TASKS_FROZEN)
	98	#define CPU_DOWN_FAILED_FROZEN (CPU_DOWN_FAILED \| CPU_TASKS_FROZEN)
	99	#define CPU_DEAD_FROZEN (CPU_DEAD \| CPU_TASKS_FROZEN)
	100	#define CPU_DYING_FROZEN (CPU_DYING \| CPU_TASKS_FROZEN)
	101	#define CPU_STARTING_FROZEN (CPU_STARTING \| CPU_TASKS_FROZEN)
	102
	103
1da177e4	104	#ifdef CONFIG_SMP
090e77c3	105	extern bool cpuhp_tasks_frozen;
1da177e4	106	/* Need to know about CPUs going up/down? */
799e64f0 PM	107	#if defined(CONFIG_HOTPLUG_CPU) \|\| !defined(MODULE)
799e64f0 PM	108	#define cpu_notifier(fn, pri) { \
0db0628d	109	static struct notifier_block fn##_nb = \
799e64f0 PM	110	{ .notifier_call = fn, .priority = pri }; \
	111	register_cpu_notifier(&fn##_nb); \
	112	}
93ae4f97 SB	113
	114	#define __cpu_notifier(fn, pri) { \
	115	static struct notifier_block fn##_nb = \
	116	{ .notifier_call = fn, .priority = pri }; \
	117	__register_cpu_notifier(&fn##_nb); \
	118	}
799e64f0 PM	119	#else /* #if defined(CONFIG_HOTPLUG_CPU) \|\| !defined(MODULE) */
799e64f0 PM	120	#define cpu_notifier(fn, pri) do { (void)(fn); } while (0)
93ae4f97	121	#define __cpu_notifier(fn, pri) do { (void)(fn); } while (0)
799e64f0	122	#endif /* #else #if defined(CONFIG_HOTPLUG_CPU) \|\| !defined(MODULE) */
93ae4f97	123
65edc68c	124	#ifdef CONFIG_HOTPLUG_CPU
47e627bc	125	extern int register_cpu_notifier(struct notifier_block *nb);
93ae4f97	126	extern int __register_cpu_notifier(struct notifier_block *nb);
1da177e4	127	extern void unregister_cpu_notifier(struct notifier_block *nb);
93ae4f97	128	extern void __unregister_cpu_notifier(struct notifier_block *nb);
65edc68c	129	#else
47e627bc AK	130
	131	#ifndef MODULE
	132	extern int register_cpu_notifier(struct notifier_block *nb);
93ae4f97	133	extern int __register_cpu_notifier(struct notifier_block *nb);
47e627bc AK	134	#else
	135	static inline int register_cpu_notifier(struct notifier_block *nb)
	136	{
	137	return 0;
	138	}
93ae4f97 SB	139
	140	static inline int __register_cpu_notifier(struct notifier_block *nb)
	141	{
	142	return 0;
	143	}
47e627bc AK	144	#endif
47e627bc AK	145
65edc68c CS	146	static inline void unregister_cpu_notifier(struct notifier_block *nb)
	147	{
	148	}
93ae4f97 SB	149
	150	static inline void __unregister_cpu_notifier(struct notifier_block *nb)
	151	{
	152	}
65edc68c	153	#endif
1da177e4 LT	154
1da177e4 LT	155	int cpu_up(unsigned int cpu);
e545a614	156	void notify_cpu_starting(unsigned int cpu);
3da1c84c ON	157	extern void cpu_maps_update_begin(void);
3da1c84c ON	158	extern void cpu_maps_update_done(void);
d0d23b54	159
93ae4f97 SB	160	#define cpu_notifier_register_begin cpu_maps_update_begin
	161	#define cpu_notifier_register_done cpu_maps_update_done
	162
3da1c84c	163	#else /* CONFIG_SMP */
090e77c3	164	#define cpuhp_tasks_frozen 0
1da177e4	165
799e64f0	166	#define cpu_notifier(fn, pri) do { (void)(fn); } while (0)
93ae4f97	167	#define __cpu_notifier(fn, pri) do { (void)(fn); } while (0)
799e64f0	168
1da177e4 LT	169	static inline int register_cpu_notifier(struct notifier_block *nb)
	170	{
	171	return 0;
	172	}
d0d23b54	173
93ae4f97 SB	174	static inline int __register_cpu_notifier(struct notifier_block *nb)
	175	{
	176	return 0;
	177	}
	178
1da177e4 LT	179	static inline void unregister_cpu_notifier(struct notifier_block *nb)
	180	{
	181	}
	182
93ae4f97 SB	183	static inline void __unregister_cpu_notifier(struct notifier_block *nb)
	184	{
	185	}
	186
3da1c84c ON	187	static inline void cpu_maps_update_begin(void)
	188	{
	189	}
	190
	191	static inline void cpu_maps_update_done(void)
	192	{
	193	}
	194
93ae4f97 SB	195	static inline void cpu_notifier_register_begin(void)
	196	{
	197	}
	198
	199	static inline void cpu_notifier_register_done(void)
	200	{
	201	}
	202
1da177e4	203	#endif /* CONFIG_SMP */
8a25a2fd	204	extern struct bus_type cpu_subsys;
1da177e4 LT	205
	206	#ifdef CONFIG_HOTPLUG_CPU
	207	/* Stop CPUs going up and down. */
f7dff2b1	208
b9d10be7 TK	209	extern void cpu_hotplug_begin(void);
b9d10be7 TK	210	extern void cpu_hotplug_done(void);
86ef5c9a GS	211	extern void get_online_cpus(void);
86ef5c9a GS	212	extern void put_online_cpus(void);
16e53dbf SB	213	extern void cpu_hotplug_disable(void);
16e53dbf SB	214	extern void cpu_hotplug_enable(void);
799e64f0	215	#define hotcpu_notifier(fn, pri) cpu_notifier(fn, pri)
93ae4f97	216	#define __hotcpu_notifier(fn, pri) __cpu_notifier(fn, pri)
39f4885c	217	#define register_hotcpu_notifier(nb) register_cpu_notifier(nb)
93ae4f97	218	#define __register_hotcpu_notifier(nb) __register_cpu_notifier(nb)
39f4885c	219	#define unregister_hotcpu_notifier(nb) unregister_cpu_notifier(nb)
93ae4f97	220	#define __unregister_hotcpu_notifier(nb) __unregister_cpu_notifier(nb)
cb79295e	221	void clear_tasks_mm_cpumask(int cpu);
1da177e4	222	int cpu_down(unsigned int cpu);
f7dff2b1 GS	223
	224	#else /* CONFIG_HOTPLUG_CPU */
	225
b9d10be7 TK	226	static inline void cpu_hotplug_begin(void) {}
b9d10be7 TK	227	static inline void cpu_hotplug_done(void) {}
86ef5c9a GS	228	#define get_online_cpus() do { } while (0)
86ef5c9a GS	229	#define put_online_cpus() do { } while (0)
16e53dbf SB	230	#define cpu_hotplug_disable() do { } while (0)
16e53dbf SB	231	#define cpu_hotplug_enable() do { } while (0)
02316067	232	#define hotcpu_notifier(fn, pri) do { (void)(fn); } while (0)
93ae4f97	233	#define __hotcpu_notifier(fn, pri) do { (void)(fn); } while (0)
761bb431 SS	234	/* These aren't inline functions due to a GCC bug. */
761bb431 SS	235	#define register_hotcpu_notifier(nb) ({ (void)(nb); 0; })
93ae4f97	236	#define __register_hotcpu_notifier(nb) ({ (void)(nb); 0; })
761bb431	237	#define unregister_hotcpu_notifier(nb) ({ (void)(nb); })
93ae4f97	238	#define __unregister_hotcpu_notifier(nb) ({ (void)(nb); })
f7dff2b1	239	#endif /* CONFIG_HOTPLUG_CPU */
1da177e4	240
f3de4be9	241	#ifdef CONFIG_PM_SLEEP_SMP
e3920fb4 RW	242	extern int disable_nonboot_cpus(void);
e3920fb4 RW	243	extern void enable_nonboot_cpus(void);
f3de4be9	244	#else /* !CONFIG_PM_SLEEP_SMP */
e3920fb4 RW	245	static inline int disable_nonboot_cpus(void) { return 0; }
e3920fb4 RW	246	static inline void enable_nonboot_cpus(void) {}
f3de4be9	247	#endif /* !CONFIG_PM_SLEEP_SMP */
e3920fb4	248
a1a04ec3	249	void cpu_startup_entry(enum cpuhp_state state);
a1a04ec3	250
d1669912 TG	251	void cpu_idle_poll_ctrl(bool enable);
	252
	253	void arch_cpu_idle(void);
	254	void arch_cpu_idle_prepare(void);
	255	void arch_cpu_idle_enter(void);
	256	void arch_cpu_idle_exit(void);
	257	void arch_cpu_idle_dead(void);
	258
8038dad7 PM	259	int cpu_report_state(int cpu);
	260	int cpu_check_up_prepare(int cpu);
	261	void cpu_set_state_online(int cpu);
	262	#ifdef CONFIG_HOTPLUG_CPU
	263	bool cpu_wait_death(unsigned int cpu, int seconds);
	264	bool cpu_report_death(void);
e69aab13 TG	265	void cpuhp_report_idle_dead(void);
	266	#else
	267	static inline void cpuhp_report_idle_dead(void) { }
8038dad7 PM	268	#endif /* #ifdef CONFIG_HOTPLUG_CPU */
8038dad7 PM	269
1da177e4	270	#endif /* _LINUX_CPU_H_ */