[linux-2.6-block.git] / kernel / power / power.h

/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/suspend.h>
#include <linux/suspend_ioctls.h>
#include <linux/utsname.h>
#include <linux/freezer.h>
#include <linux/compiler.h>
#include <linux/cpu.h>
#include <linux/cpuidle.h>

struct swsusp_info {
	struct new_utsname	uts;
	u32			version_code;
	unsigned long		num_physpages;
	int			cpus;
	unsigned long		image_pages;
	unsigned long		pages;
	unsigned long		size;
} __aligned(PAGE_SIZE);

#ifdef CONFIG_HIBERNATION
/* kernel/power/snapshot.c */
extern void __init hibernate_reserved_size_init(void);
extern void __init hibernate_image_size_init(void);

#ifdef CONFIG_ARCH_HIBERNATION_HEADER
/* Maximum size of architecture specific data in a hibernation header */
#define MAX_ARCH_HEADER_SIZE	(sizeof(struct new_utsname) + 4)

static inline int init_header_complete(struct swsusp_info *info)
{
	return arch_hibernation_header_save(info, MAX_ARCH_HEADER_SIZE);
}

static inline const char *check_image_kernel(struct swsusp_info *info)
{
	return arch_hibernation_header_restore(info) ?
			"architecture specific data" : NULL;
}
#endif /* CONFIG_ARCH_HIBERNATION_HEADER */

/*
 * Keep some memory free so that I/O operations can succeed without paging
 * [Might this be more than 4 MB?]
 */
#define PAGES_FOR_IO	((4096 * 1024) >> PAGE_SHIFT)

/*
 * Keep 1 MB of memory free so that device drivers can allocate some pages in
 * their .suspend() routines without breaking the suspend to disk.
 */
#define SPARE_PAGES	((1024 * 1024) >> PAGE_SHIFT)

asmlinkage int swsusp_save(void);

/* kernel/power/hibernate.c */
extern bool freezer_test_done;

extern int hibernation_snapshot(int platform_mode);
extern int hibernation_restore(int platform_mode);
extern int hibernation_platform_enter(void);

#ifdef CONFIG_STRICT_KERNEL_RWX
/* kernel/power/snapshot.c */
extern void enable_restore_image_protection(void);
#else
static inline void enable_restore_image_protection(void) {}
#endif /* CONFIG_STRICT_KERNEL_RWX */

#else /* !CONFIG_HIBERNATION */

static inline void hibernate_reserved_size_init(void) {}
static inline void hibernate_image_size_init(void) {}
#endif /* !CONFIG_HIBERNATION */

#define power_attr(_name) \
static struct kobj_attribute _name##_attr = {	\
	.attr	= {				\
		.name = __stringify(_name),	\
		.mode = 0644,			\
	},					\
	.show	= _name##_show,			\
	.store	= _name##_store,		\
}

#define power_attr_ro(_name) \
static struct kobj_attribute _name##_attr = {	\
	.attr	= {				\
		.name = __stringify(_name),	\
		.mode = S_IRUGO,		\
	},					\
	.show	= _name##_show,			\
}

/* Preferred image size in bytes (default 500 MB) */
extern unsigned long image_size;
/* Size of memory reserved for drivers (default SPARE_PAGES x PAGE_SIZE) */
extern unsigned long reserved_size;
extern int in_suspend;
extern dev_t swsusp_resume_device;
extern sector_t swsusp_resume_block;

extern int create_basic_memory_bitmaps(void);
extern void free_basic_memory_bitmaps(void);
extern int hibernate_preallocate_memory(void);

extern void clear_or_poison_free_pages(void);

/**
 *	Auxiliary structure used for reading the snapshot image data and
 *	metadata from and writing them to the list of page backup entries
 *	(PBEs) which is the main data structure of swsusp.
 *
 *	Using struct snapshot_handle we can transfer the image, including its
 *	metadata, as a continuous sequence of bytes with the help of
 *	snapshot_read_next() and snapshot_write_next().
 *
 *	The code that writes the image to a storage or transfers it to
 *	the user land is required to use snapshot_read_next() for this
 *	purpose and it should not make any assumptions regarding the internal
 *	structure of the image.  Similarly, the code that reads the image from
 *	a storage or transfers it from the user land is required to use
 *	snapshot_write_next().
 *
 *	This may allow us to change the internal structure of the image
 *	in the future with considerably less effort.
 */

struct snapshot_handle {
	unsigned int	cur;	/* number of the block of PAGE_SIZE bytes the
				 * next operation will refer to (ie. current)
				 */
	void		*buffer;	/* address of the block to read from
					 * or write to
					 */
	int		sync_read;	/* Set to one to notify the caller of
					 * snapshot_write_next() that it may
					 * need to call wait_on_bio_chain()
					 */
};

/* This macro returns the address from/to which the caller of
 * snapshot_read_next()/snapshot_write_next() is allowed to
 * read/write data after the function returns
 */
#define data_of(handle)	((handle).buffer)

extern unsigned int snapshot_additional_pages(struct zone *zone);
extern unsigned long snapshot_get_image_size(void);
extern int snapshot_read_next(struct snapshot_handle *handle);
extern int snapshot_write_next(struct snapshot_handle *handle);
extern void snapshot_write_finalize(struct snapshot_handle *handle);
extern int snapshot_image_loaded(struct snapshot_handle *handle);

extern bool hibernate_acquire(void);
extern void hibernate_release(void);

extern sector_t alloc_swapdev_block(int swap);
extern void free_all_swap_pages(int swap);
extern int swsusp_swap_in_use(void);

/*
 * Flags that can be passed from the hibernatig hernel to the "boot" kernel in
 * the image header.
 */
#define SF_PLATFORM_MODE	1
#define SF_NOCOMPRESS_MODE	2
#define SF_CRC32_MODE	        4
#define SF_HW_SIG		8

/* kernel/power/hibernate.c */
int swsusp_check(bool snapshot_test);
extern void swsusp_free(void);
extern int swsusp_read(unsigned int *flags_p);
extern int swsusp_write(unsigned int flags);
void swsusp_close(bool snapshot_test);
#ifdef CONFIG_SUSPEND
extern int swsusp_unmark(void);
#endif

struct __kernel_old_timeval;
/* kernel/power/swsusp.c */
extern void swsusp_show_speed(ktime_t, ktime_t, unsigned int, char *);

#ifdef CONFIG_SUSPEND
/* kernel/power/suspend.c */
extern const char * const pm_labels[];
extern const char *pm_states[];
extern const char *mem_sleep_states[];

extern int suspend_devices_and_enter(suspend_state_t state);
#else /* !CONFIG_SUSPEND */
#define mem_sleep_current	PM_SUSPEND_ON

static inline int suspend_devices_and_enter(suspend_state_t state)
{
	return -ENOSYS;
}
#endif /* !CONFIG_SUSPEND */

#ifdef CONFIG_PM_TEST_SUSPEND
/* kernel/power/suspend_test.c */
extern void suspend_test_start(void);
extern void suspend_test_finish(const char *label);
#else /* !CONFIG_PM_TEST_SUSPEND */
static inline void suspend_test_start(void) {}
static inline void suspend_test_finish(const char *label) {}
#endif /* !CONFIG_PM_TEST_SUSPEND */

#ifdef CONFIG_PM_SLEEP
/* kernel/power/main.c */
extern int pm_notifier_call_chain_robust(unsigned long val_up, unsigned long val_down);
extern int pm_notifier_call_chain(unsigned long val);
void pm_restrict_gfp_mask(void);
void pm_restore_gfp_mask(void);
#else
static inline void pm_restrict_gfp_mask(void) {}
static inline void pm_restore_gfp_mask(void) {}
#endif

#ifdef CONFIG_HIGHMEM
int restore_highmem(void);
#else
static inline unsigned int count_highmem_pages(void) { return 0; }
static inline int restore_highmem(void) { return 0; }
#endif

/*
 * Suspend test levels
 */
enum {
	/* keep first */
	TEST_NONE,
	TEST_CORE,
	TEST_CPUS,
	TEST_PLATFORM,
	TEST_DEVICES,
	TEST_FREEZER,
	/* keep last */
	__TEST_AFTER_LAST
};

#define TEST_FIRST	TEST_NONE
#define TEST_MAX	(__TEST_AFTER_LAST - 1)

#ifdef CONFIG_PM_SLEEP_DEBUG
extern int pm_test_level;
#else
#define pm_test_level	(TEST_NONE)
#endif

#ifdef CONFIG_SUSPEND_FREEZER
static inline int suspend_freeze_processes(void)
{
	int error;

	error = freeze_processes();
	/*
	 * freeze_processes() automatically thaws every task if freezing
	 * fails. So we need not do anything extra upon error.
	 */
	if (error)
		return error;

	error = freeze_kernel_threads();
	/*
	 * freeze_kernel_threads() thaws only kernel threads upon freezing
	 * failure. So we have to thaw the userspace tasks ourselves.
	 */
	if (error)
		thaw_processes();

	return error;
}

static inline void suspend_thaw_processes(void)
{
	thaw_processes();
}
#else
static inline int suspend_freeze_processes(void)
{
	return 0;
}

static inline void suspend_thaw_processes(void)
{
}
#endif

#ifdef CONFIG_PM_AUTOSLEEP

/* kernel/power/autosleep.c */
extern int pm_autosleep_init(void);
extern int pm_autosleep_lock(void);
extern void pm_autosleep_unlock(void);
extern suspend_state_t pm_autosleep_state(void);
extern int pm_autosleep_set_state(suspend_state_t state);

#else /* !CONFIG_PM_AUTOSLEEP */

static inline int pm_autosleep_init(void) { return 0; }
static inline int pm_autosleep_lock(void) { return 0; }
static inline void pm_autosleep_unlock(void) {}
static inline suspend_state_t pm_autosleep_state(void) { return PM_SUSPEND_ON; }

#endif /* !CONFIG_PM_AUTOSLEEP */

#ifdef CONFIG_PM_WAKELOCKS

/* kernel/power/wakelock.c */
extern ssize_t pm_show_wakelocks(char *buf, bool show_active);
extern int pm_wake_lock(const char *buf);
extern int pm_wake_unlock(const char *buf);

#endif /* !CONFIG_PM_WAKELOCKS */

static inline int pm_sleep_disable_secondary_cpus(void)
{
	cpuidle_pause();
	return suspend_disable_secondary_cpus();
}

static inline void pm_sleep_enable_secondary_cpus(void)
{
	suspend_enable_secondary_cpus();
	cpuidle_resume();
}
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4	2	#include <linux/suspend.h>
3010f8ca	3	#include <linux/suspend_ioctls.h>
1da177e4	4	#include <linux/utsname.h>
b28f5081	5	#include <linux/freezer.h>
52f5684c	6	#include <linux/compiler.h>
23f62d7a RW	7	#include <linux/cpu.h>
23f62d7a RW	8	#include <linux/cpuidle.h>
1da177e4	9
1da177e4 LT	10	struct swsusp_info {
	11	struct new_utsname uts;
	12	u32 version_code;
	13	unsigned long num_physpages;
	14	int cpus;
	15	unsigned long image_pages;
7088a5c0	16	unsigned long pages;
6e1819d6	17	unsigned long size;
52f5684c	18	} __aligned(PAGE_SIZE);
1da177e4	19
d307c4a8	20	#ifdef CONFIG_HIBERNATION
ac5c24ec	21	/* kernel/power/snapshot.c */
ddeb6487	22	extern void __init hibernate_reserved_size_init(void);
ac5c24ec RW	23	extern void __init hibernate_image_size_init(void);
ac5c24ec RW	24
d307c4a8 RW	25	#ifdef CONFIG_ARCH_HIBERNATION_HEADER
	26	/* Maximum size of architecture specific data in a hibernation header */
	27	#define MAX_ARCH_HEADER_SIZE (sizeof(struct new_utsname) + 4)
1da177e4	28
d307c4a8 RW	29	static inline int init_header_complete(struct swsusp_info *info)
	30	{
	31	return arch_hibernation_header_save(info, MAX_ARCH_HEADER_SIZE);
	32	}
	33
02d7f400	34	static inline const char check_image_kernel(struct swsusp_info info)
d307c4a8 RW	35	{
	36	return arch_hibernation_header_restore(info) ?
	37	"architecture specific data" : NULL;
	38	}
	39	#endif /* CONFIG_ARCH_HIBERNATION_HEADER */
1da177e4	40
56f99bcb RW	41	/*
	42	* Keep some memory free so that I/O operations can succeed without paging
	43	* [Might this be more than 4 MB?]
	44	*/
	45	#define PAGES_FOR_IO ((4096 * 1024) >> PAGE_SHIFT)
d307c4a8	46
56f99bcb RW	47	/*
	48	* Keep 1 MB of memory free so that device drivers can allocate some pages in
	49	* their .suspend() routines without breaking the suspend to disk.
	50	*/
	51	#define SPARE_PAGES ((1024 * 1024) >> PAGE_SHIFT)
1da177e4	52
04b73469 RK	53	asmlinkage int swsusp_save(void);
04b73469 RK	54
8b759b84	55	/* kernel/power/hibernate.c */
97819a26 SB	56	extern bool freezer_test_done;
97819a26 SB	57
7777fab9	58	extern int hibernation_snapshot(int platform_mode);
a634cc10	59	extern int hibernation_restore(int platform_mode);
7777fab9	60	extern int hibernation_platform_enter(void);
ac5c24ec	61
0f5bf6d0	62	#ifdef CONFIG_STRICT_KERNEL_RWX
4c0b6c10 RW	63	/* kernel/power/snapshot.c */
	64	extern void enable_restore_image_protection(void);
	65	#else
	66	static inline void enable_restore_image_protection(void) {}
0f5bf6d0	67	#endif /* CONFIG_STRICT_KERNEL_RWX */
4c0b6c10	68
ac5c24ec RW	69	#else /* !CONFIG_HIBERNATION */
ac5c24ec RW	70
ddeb6487	71	static inline void hibernate_reserved_size_init(void) {}
ac5c24ec RW	72	static inline void hibernate_image_size_init(void) {}
ac5c24ec RW	73	#endif /* !CONFIG_HIBERNATION */
a6d70980	74
1da177e4	75	#define power_attr(_name) \
386f275f	76	static struct kobj_attribute _name##_attr = { \
1da177e4 LT	77	.attr = { \
	78	.name = __stringify(_name), \
	79	.mode = 0644, \
	80	}, \
	81	.show = _name##_show, \
	82	.store = _name##_store, \
	83	}
	84
a1e9ca69 RW	85	#define power_attr_ro(_name) \
	86	static struct kobj_attribute _name##_attr = { \
	87	.attr = { \
	88	.name = __stringify(_name), \
	89	.mode = S_IRUGO, \
	90	}, \
	91	.show = _name##_show, \
	92	}
	93
853609b6 RW	94	/* Preferred image size in bytes (default 500 MB) */
853609b6 RW	95	extern unsigned long image_size;
ddeb6487 RW	96	/* Size of memory reserved for drivers (default SPARE_PAGES x PAGE_SIZE) */
ddeb6487 RW	97	extern unsigned long reserved_size;
f577eb30	98	extern int in_suspend;
61159a31	99	extern dev_t swsusp_resume_device;
9a154d9d	100	extern sector_t swsusp_resume_block;
f577eb30	101
74dfd666 RW	102	extern int create_basic_memory_bitmaps(void);
74dfd666 RW	103	extern void free_basic_memory_bitmaps(void);
64a473cb	104	extern int hibernate_preallocate_memory(void);
f577eb30	105
03b6c9a3	106	extern void clear_or_poison_free_pages(void);
1ad1410f	107
fb13a28b RW	108	/**
	109	* Auxiliary structure used for reading the snapshot image data and
	110	* metadata from and writing them to the list of page backup entries
	111	* (PBEs) which is the main data structure of swsusp.
	112	*
	113	* Using struct snapshot_handle we can transfer the image, including its
	114	* metadata, as a continuous sequence of bytes with the help of
	115	* snapshot_read_next() and snapshot_write_next().
	116	*
	117	* The code that writes the image to a storage or transfers it to
	118	* the user land is required to use snapshot_read_next() for this
	119	* purpose and it should not make any assumptions regarding the internal
	120	* structure of the image. Similarly, the code that reads the image from
	121	* a storage or transfers it from the user land is required to use
	122	* snapshot_write_next().
	123	*
	124	* This may allow us to change the internal structure of the image
	125	* in the future with considerably less effort.
	126	*/
	127
f577eb30	128	struct snapshot_handle {
fb13a28b RW	129	unsigned int cur; /* number of the block of PAGE_SIZE bytes the
	130	* next operation will refer to (ie. current)
	131	*/
fb13a28b RW	132	void buffer; / address of the block to read from
	133	* or write to
	134	*/
fb13a28b RW	135	int sync_read; /* Set to one to notify the caller of
	136	* snapshot_write_next() that it may
	137	* need to call wait_on_bio_chain()
	138	*/
f577eb30 RW	139	};
f577eb30 RW	140
fb13a28b RW	141	/* This macro returns the address from/to which the caller of
	142	* snapshot_read_next()/snapshot_write_next() is allowed to
	143	* read/write data after the function returns
	144	*/
d3c1b24c	145	#define data_of(handle) ((handle).buffer)
f577eb30	146
b788db79	147	extern unsigned int snapshot_additional_pages(struct zone *zone);
af508b34	148	extern unsigned long snapshot_get_image_size(void);
d3c1b24c JS	149	extern int snapshot_read_next(struct snapshot_handle *handle);
d3c1b24c JS	150	extern int snapshot_write_next(struct snapshot_handle *handle);
8357376d	151	extern void snapshot_write_finalize(struct snapshot_handle *handle);
b788db79	152	extern int snapshot_image_loaded(struct snapshot_handle *handle);
61159a31	153
ab7e9b06 DA	154	extern bool hibernate_acquire(void);
ab7e9b06 DA	155	extern void hibernate_release(void);
0709db60	156
d1d241cc RW	157	extern sector_t alloc_swapdev_block(int swap);
	158	extern void free_all_swap_pages(int swap);
	159	extern int swsusp_swap_in_use(void);
61159a31	160
a634cc10 RW	161	/*
	162	* Flags that can be passed from the hibernatig hernel to the "boot" kernel in
	163	* the image header.
	164	*/
	165	#define SF_PLATFORM_MODE 1
f996fc96	166	#define SF_NOCOMPRESS_MODE 2
081a9d04	167	#define SF_CRC32_MODE 4
74d95555	168	#define SF_HW_SIG 8
a634cc10	169
8b759b84	170	/* kernel/power/hibernate.c */
d6545e68	171	int swsusp_check(bool snapshot_test);
74c7e2ef	172	extern void swsusp_free(void);
a634cc10 RW	173	extern int swsusp_read(unsigned int *flags_p);
a634cc10 RW	174	extern int swsusp_write(unsigned int flags);
2736e8ee	175	void swsusp_close(bool snapshot_test);
62c552cc BS	176	#ifdef CONFIG_SUSPEND
	177	extern int swsusp_unmark(void);
	178	#endif
0d3a9abe	179
75d319c0	180	struct __kernel_old_timeval;
b10d9117	181	/* kernel/power/swsusp.c */
db597605	182	extern void swsusp_show_speed(ktime_t, ktime_t, unsigned int, char *);
b10d9117	183
296699de	184	#ifdef CONFIG_SUSPEND
a9d70523	185	/* kernel/power/suspend.c */
406e7938	186	extern const char * const pm_labels[];
d431cbc5	187	extern const char *pm_states[];
406e7938	188	extern const char *mem_sleep_states[];
a9d70523	189
6c961dfb	190	extern int suspend_devices_and_enter(suspend_state_t state);
296699de	191	#else /* !CONFIG_SUSPEND */
406e7938 RW	192	#define mem_sleep_current PM_SUSPEND_ON
406e7938 RW	193
296699de RW	194	static inline int suspend_devices_and_enter(suspend_state_t state)
	195	{
	196	return -ENOSYS;
	197	}
	198	#endif /* !CONFIG_SUSPEND */
	199
a9d70523 RW	200	#ifdef CONFIG_PM_TEST_SUSPEND
	201	/* kernel/power/suspend_test.c */
	202	extern void suspend_test_start(void);
	203	extern void suspend_test_finish(const char *label);
	204	#else /* !CONFIG_PM_TEST_SUSPEND */
	205	static inline void suspend_test_start(void) {}
	206	static inline void suspend_test_finish(const char *label) {}
	207	#endif /* !CONFIG_PM_TEST_SUSPEND */
	208
82525756 AS	209	#ifdef CONFIG_PM_SLEEP
82525756 AS	210	/* kernel/power/main.c */
70d93298	211	extern int pm_notifier_call_chain_robust(unsigned long val_up, unsigned long val_down);
82525756	212	extern int pm_notifier_call_chain(unsigned long val);
07f44ac3 KW	213	void pm_restrict_gfp_mask(void);
	214	void pm_restore_gfp_mask(void);
	215	#else
	216	static inline void pm_restrict_gfp_mask(void) {}
	217	static inline void pm_restore_gfp_mask(void) {}
82525756	218	#endif
2f8ed1c6 AB	219
2f8ed1c6 AB	220	#ifdef CONFIG_HIGHMEM
2f8ed1c6 AB	221	int restore_highmem(void);
	222	#else
	223	static inline unsigned int count_highmem_pages(void) { return 0; }
	224	static inline int restore_highmem(void) { return 0; }
	225	#endif
0e7d56e3 RW	226
	227	/*
	228	* Suspend test levels
	229	*/
	230	enum {
	231	/* keep first */
	232	TEST_NONE,
	233	TEST_CORE,
	234	TEST_CPUS,
	235	TEST_PLATFORM,
	236	TEST_DEVICES,
	237	TEST_FREEZER,
	238	/* keep last */
	239	__TEST_AFTER_LAST
	240	};
	241
	242	#define TEST_FIRST TEST_NONE
	243	#define TEST_MAX (__TEST_AFTER_LAST - 1)
4cc79776	244
e516a1db	245	#ifdef CONFIG_PM_SLEEP_DEBUG
4cc79776	246	extern int pm_test_level;
8e6bcd9f RW	247	#else
	248	#define pm_test_level (TEST_NONE)
	249	#endif
b28f5081 JB	250
	251	#ifdef CONFIG_SUSPEND_FREEZER
	252	static inline int suspend_freeze_processes(void)
	253	{
379e0be8 SB	254	int error;
	255
	256	error = freeze_processes();
379e0be8 SB	257	/*
	258	* freeze_processes() automatically thaws every task if freezing
	259	* fails. So we need not do anything extra upon error.
	260	*/
	261	if (error)
6f585f75	262	return error;
379e0be8 SB	263
379e0be8 SB	264	error = freeze_kernel_threads();
379e0be8 SB	265	/*
	266	* freeze_kernel_threads() thaws only kernel threads upon freezing
	267	* failure. So we have to thaw the userspace tasks ourselves.
	268	*/
	269	if (error)
	270	thaw_processes();
	271
379e0be8	272	return error;
b28f5081 JB	273	}
	274
	275	static inline void suspend_thaw_processes(void)
	276	{
	277	thaw_processes();
	278	}
	279	#else
	280	static inline int suspend_freeze_processes(void)
	281	{
	282	return 0;
	283	}
	284
	285	static inline void suspend_thaw_processes(void)
	286	{
	287	}
	288	#endif
7483b4a4 RW	289
	290	#ifdef CONFIG_PM_AUTOSLEEP
	291
	292	/* kernel/power/autosleep.c */
	293	extern int pm_autosleep_init(void);
	294	extern int pm_autosleep_lock(void);
	295	extern void pm_autosleep_unlock(void);
	296	extern suspend_state_t pm_autosleep_state(void);
	297	extern int pm_autosleep_set_state(suspend_state_t state);
	298
	299	#else /* !CONFIG_PM_AUTOSLEEP */
	300
	301	static inline int pm_autosleep_init(void) { return 0; }
	302	static inline int pm_autosleep_lock(void) { return 0; }
	303	static inline void pm_autosleep_unlock(void) {}
	304	static inline suspend_state_t pm_autosleep_state(void) { return PM_SUSPEND_ON; }
	305
	306	#endif /* !CONFIG_PM_AUTOSLEEP */
b86ff982 RW	307
	308	#ifdef CONFIG_PM_WAKELOCKS
	309
	310	/* kernel/power/wakelock.c */
	311	extern ssize_t pm_show_wakelocks(char *buf, bool show_active);
	312	extern int pm_wake_lock(const char *buf);
	313	extern int pm_wake_unlock(const char *buf);
	314
	315	#endif /* !CONFIG_PM_WAKELOCKS */
23f62d7a RW	316
	317	static inline int pm_sleep_disable_secondary_cpus(void)
	318	{
	319	cpuidle_pause();
	320	return suspend_disable_secondary_cpus();
	321	}
	322
	323	static inline void pm_sleep_enable_secondary_cpus(void)
	324	{
	325	suspend_enable_secondary_cpus();
	326	cpuidle_resume();
	327	}