[mirror_ubuntu-artful-kernel.git] / include / linux / tick.h

/*
 * Tick related global functions
 */
#ifndef _LINUX_TICK_H
#define _LINUX_TICK_H

#include <linux/clockchips.h>
#include <linux/irqflags.h>
#include <linux/percpu.h>
#include <linux/context_tracking_state.h>
#include <linux/cpumask.h>
#include <linux/sched.h>

#ifdef CONFIG_GENERIC_CLOCKEVENTS
extern void __init tick_init(void);
/* Should be core only, but ARM BL switcher requires it */
extern void tick_suspend_local(void);
/* Should be core only, but XEN resume magic and ARM BL switcher require it */
extern void tick_resume_local(void);
extern void tick_handover_do_timer(void);
extern void tick_cleanup_dead_cpu(int cpu);
#else /* CONFIG_GENERIC_CLOCKEVENTS */
static inline void tick_init(void) { }
static inline void tick_suspend_local(void) { }
static inline void tick_resume_local(void) { }
static inline void tick_handover_do_timer(void) { }
static inline void tick_cleanup_dead_cpu(int cpu) { }
#endif /* !CONFIG_GENERIC_CLOCKEVENTS */

#if defined(CONFIG_GENERIC_CLOCKEVENTS) && defined(CONFIG_SUSPEND)
extern void tick_freeze(void);
extern void tick_unfreeze(void);
#else
static inline void tick_freeze(void) { }
static inline void tick_unfreeze(void) { }
#endif

#ifdef CONFIG_TICK_ONESHOT
extern void tick_irq_enter(void);
#  ifndef arch_needs_cpu
#   define arch_needs_cpu() (0)
#  endif
# else
static inline void tick_irq_enter(void) { }
#endif

#if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT)
extern void hotplug_cpu__broadcast_tick_pull(int dead_cpu);
#else
static inline void hotplug_cpu__broadcast_tick_pull(int dead_cpu) { }
#endif

enum tick_broadcast_mode {
	TICK_BROADCAST_OFF,
	TICK_BROADCAST_ON,
	TICK_BROADCAST_FORCE,
};

enum tick_broadcast_state {
	TICK_BROADCAST_EXIT,
	TICK_BROADCAST_ENTER,
};

#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
extern void tick_broadcast_control(enum tick_broadcast_mode mode);
#else
static inline void tick_broadcast_control(enum tick_broadcast_mode mode) { }
#endif /* BROADCAST */

#ifdef CONFIG_GENERIC_CLOCKEVENTS
extern int tick_broadcast_oneshot_control(enum tick_broadcast_state state);
#else
static inline int tick_broadcast_oneshot_control(enum tick_broadcast_state state)
{
	return 0;
}
#endif

static inline void tick_broadcast_enable(void)
{
	tick_broadcast_control(TICK_BROADCAST_ON);
}
static inline void tick_broadcast_disable(void)
{
	tick_broadcast_control(TICK_BROADCAST_OFF);
}
static inline void tick_broadcast_force(void)
{
	tick_broadcast_control(TICK_BROADCAST_FORCE);
}
static inline int tick_broadcast_enter(void)
{
	return tick_broadcast_oneshot_control(TICK_BROADCAST_ENTER);
}
static inline void tick_broadcast_exit(void)
{
	tick_broadcast_oneshot_control(TICK_BROADCAST_EXIT);
}

enum tick_dep_bits {
	TICK_DEP_BIT_POSIX_TIMER	= 0,
	TICK_DEP_BIT_PERF_EVENTS	= 1,
	TICK_DEP_BIT_SCHED		= 2,
	TICK_DEP_BIT_CLOCK_UNSTABLE	= 3
};

#define TICK_DEP_MASK_NONE		0
#define TICK_DEP_MASK_POSIX_TIMER	(1 << TICK_DEP_BIT_POSIX_TIMER)
#define TICK_DEP_MASK_PERF_EVENTS	(1 << TICK_DEP_BIT_PERF_EVENTS)
#define TICK_DEP_MASK_SCHED		(1 << TICK_DEP_BIT_SCHED)
#define TICK_DEP_MASK_CLOCK_UNSTABLE	(1 << TICK_DEP_BIT_CLOCK_UNSTABLE)

#ifdef CONFIG_NO_HZ_COMMON
extern bool tick_nohz_enabled;
extern int tick_nohz_tick_stopped(void);
extern void tick_nohz_idle_enter(void);
extern void tick_nohz_idle_exit(void);
extern void tick_nohz_irq_exit(void);
extern ktime_t tick_nohz_get_sleep_length(void);
extern unsigned long tick_nohz_get_idle_calls(void);
extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time);
extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time);
#else /* !CONFIG_NO_HZ_COMMON */
#define tick_nohz_enabled (0)
static inline int tick_nohz_tick_stopped(void) { return 0; }
static inline void tick_nohz_idle_enter(void) { }
static inline void tick_nohz_idle_exit(void) { }

static inline ktime_t tick_nohz_get_sleep_length(void)
{
	return NSEC_PER_SEC / HZ;
}
static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return -1; }
static inline u64 get_cpu_iowait_time_us(int cpu, u64 *unused) { return -1; }
#endif /* !CONFIG_NO_HZ_COMMON */

#ifdef CONFIG_NO_HZ_FULL
extern bool tick_nohz_full_running;
extern cpumask_var_t tick_nohz_full_mask;
extern cpumask_var_t housekeeping_mask;

static inline bool tick_nohz_full_enabled(void)
{
	if (!context_tracking_is_enabled())
		return false;

	return tick_nohz_full_running;
}

static inline bool tick_nohz_full_cpu(int cpu)
{
	if (!tick_nohz_full_enabled())
		return false;

	return cpumask_test_cpu(cpu, tick_nohz_full_mask);
}

static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask)
{
	if (tick_nohz_full_enabled())
		cpumask_or(mask, mask, tick_nohz_full_mask);
}

static inline int housekeeping_any_cpu(void)
{
	return cpumask_any_and(housekeeping_mask, cpu_online_mask);
}

extern void tick_nohz_dep_set(enum tick_dep_bits bit);
extern void tick_nohz_dep_clear(enum tick_dep_bits bit);
extern void tick_nohz_dep_set_cpu(int cpu, enum tick_dep_bits bit);
extern void tick_nohz_dep_clear_cpu(int cpu, enum tick_dep_bits bit);
extern void tick_nohz_dep_set_task(struct task_struct *tsk,
				   enum tick_dep_bits bit);
extern void tick_nohz_dep_clear_task(struct task_struct *tsk,
				     enum tick_dep_bits bit);
extern void tick_nohz_dep_set_signal(struct signal_struct *signal,
				     enum tick_dep_bits bit);
extern void tick_nohz_dep_clear_signal(struct signal_struct *signal,
				       enum tick_dep_bits bit);

/*
 * The below are tick_nohz_[set,clear]_dep() wrappers that optimize off-cases
 * on top of static keys.
 */
static inline void tick_dep_set(enum tick_dep_bits bit)
{
	if (tick_nohz_full_enabled())
		tick_nohz_dep_set(bit);
}

static inline void tick_dep_clear(enum tick_dep_bits bit)
{
	if (tick_nohz_full_enabled())
		tick_nohz_dep_clear(bit);
}

static inline void tick_dep_set_cpu(int cpu, enum tick_dep_bits bit)
{
	if (tick_nohz_full_cpu(cpu))
		tick_nohz_dep_set_cpu(cpu, bit);
}

static inline void tick_dep_clear_cpu(int cpu, enum tick_dep_bits bit)
{
	if (tick_nohz_full_cpu(cpu))
		tick_nohz_dep_clear_cpu(cpu, bit);
}

static inline void tick_dep_set_task(struct task_struct *tsk,
				     enum tick_dep_bits bit)
{
	if (tick_nohz_full_enabled())
		tick_nohz_dep_set_task(tsk, bit);
}
static inline void tick_dep_clear_task(struct task_struct *tsk,
				       enum tick_dep_bits bit)
{
	if (tick_nohz_full_enabled())
		tick_nohz_dep_clear_task(tsk, bit);
}
static inline void tick_dep_set_signal(struct signal_struct *signal,
				       enum tick_dep_bits bit)
{
	if (tick_nohz_full_enabled())
		tick_nohz_dep_set_signal(signal, bit);
}
static inline void tick_dep_clear_signal(struct signal_struct *signal,
					 enum tick_dep_bits bit)
{
	if (tick_nohz_full_enabled())
		tick_nohz_dep_clear_signal(signal, bit);
}

extern void tick_nohz_full_kick_cpu(int cpu);
extern void __tick_nohz_task_switch(void);
#else
static inline int housekeeping_any_cpu(void)
{
	return smp_processor_id();
}
static inline bool tick_nohz_full_enabled(void) { return false; }
static inline bool tick_nohz_full_cpu(int cpu) { return false; }
static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) { }

static inline void tick_dep_set(enum tick_dep_bits bit) { }
static inline void tick_dep_clear(enum tick_dep_bits bit) { }
static inline void tick_dep_set_cpu(int cpu, enum tick_dep_bits bit) { }
static inline void tick_dep_clear_cpu(int cpu, enum tick_dep_bits bit) { }
static inline void tick_dep_set_task(struct task_struct *tsk,
				     enum tick_dep_bits bit) { }
static inline void tick_dep_clear_task(struct task_struct *tsk,
				       enum tick_dep_bits bit) { }
static inline void tick_dep_set_signal(struct signal_struct *signal,
				       enum tick_dep_bits bit) { }
static inline void tick_dep_clear_signal(struct signal_struct *signal,
					 enum tick_dep_bits bit) { }

static inline void tick_nohz_full_kick_cpu(int cpu) { }
static inline void __tick_nohz_task_switch(void) { }
#endif

static inline const struct cpumask *housekeeping_cpumask(void)
{
#ifdef CONFIG_NO_HZ_FULL
	if (tick_nohz_full_enabled())
		return housekeeping_mask;
#endif
	return cpu_possible_mask;
}

static inline bool is_housekeeping_cpu(int cpu)
{
#ifdef CONFIG_NO_HZ_FULL
	if (tick_nohz_full_enabled())
		return cpumask_test_cpu(cpu, housekeeping_mask);
#endif
	return true;
}

static inline void housekeeping_affine(struct task_struct *t)
{
#ifdef CONFIG_NO_HZ_FULL
	if (tick_nohz_full_enabled())
		set_cpus_allowed_ptr(t, housekeeping_mask);

#endif
}

static inline void tick_nohz_task_switch(void)
{
	if (tick_nohz_full_enabled())
		__tick_nohz_task_switch();
}

#endif
Commit	Line	Data
c1797baf TG	1	/*
c1797baf TG	2	* Tick related global functions
906568c9 TG	3	*/
	4	#ifndef _LINUX_TICK_H
	5	#define _LINUX_TICK_H
	6
	7	#include <linux/clockchips.h>
2bbb6817	8	#include <linux/irqflags.h>
33a5f626	9	#include <linux/percpu.h>
460775df FW	10	#include <linux/context_tracking_state.h>
460775df FW	11	#include <linux/cpumask.h>
c0f489d2	12	#include <linux/sched.h>
906568c9	13
c1797baf TG	14	#ifdef CONFIG_GENERIC_CLOCKEVENTS
c1797baf TG	15	extern void __init tick_init(void);
7270d11c TG	16	/* Should be core only, but ARM BL switcher requires it */
	17	extern void tick_suspend_local(void);
	18	/* Should be core only, but XEN resume magic and ARM BL switcher require it */
f46481d0	19	extern void tick_resume_local(void);
52c063d1	20	extern void tick_handover_do_timer(void);
a49b116d	21	extern void tick_cleanup_dead_cpu(int cpu);
c1797baf TG	22	#else /* CONFIG_GENERIC_CLOCKEVENTS */
c1797baf TG	23	static inline void tick_init(void) { }
7270d11c	24	static inline void tick_suspend_local(void) { }
f46481d0	25	static inline void tick_resume_local(void) { }
52c063d1	26	static inline void tick_handover_do_timer(void) { }
a49b116d	27	static inline void tick_cleanup_dead_cpu(int cpu) { }
c1797baf	28	#endif /* !CONFIG_GENERIC_CLOCKEVENTS */
124cf911	29
87e9b9f1 RW	30	#if defined(CONFIG_GENERIC_CLOCKEVENTS) && defined(CONFIG_SUSPEND)
	31	extern void tick_freeze(void);
	32	extern void tick_unfreeze(void);
	33	#else
	34	static inline void tick_freeze(void) { }
	35	static inline void tick_unfreeze(void) { }
	36	#endif
	37
c1797baf	38	#ifdef CONFIG_TICK_ONESHOT
5acac1be	39	extern void tick_irq_enter(void);
3c5d92a0	40	# ifndef arch_needs_cpu
fe0f4976	41	# define arch_needs_cpu() (0)
3c5d92a0	42	# endif
79bf2bb3	43	# else
5acac1be	44	static inline void tick_irq_enter(void) { }
c1797baf	45	#endif
33a5f626	46
345527b1 PM	47	#if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT)
	48	extern void hotplug_cpu__broadcast_tick_pull(int dead_cpu);
	49	#else
	50	static inline void hotplug_cpu__broadcast_tick_pull(int dead_cpu) { }
	51	#endif
	52
592a438f TG	53	enum tick_broadcast_mode {
	54	TICK_BROADCAST_OFF,
	55	TICK_BROADCAST_ON,
	56	TICK_BROADCAST_FORCE,
	57	};
	58
1fe5d5c3 TG	59	enum tick_broadcast_state {
	60	TICK_BROADCAST_EXIT,
	61	TICK_BROADCAST_ENTER,
	62	};
	63
592a438f TG	64	#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
	65	extern void tick_broadcast_control(enum tick_broadcast_mode mode);
	66	#else
	67	static inline void tick_broadcast_control(enum tick_broadcast_mode mode) { }
	68	#endif /* BROADCAST */
	69
37b64a42	70	#ifdef CONFIG_GENERIC_CLOCKEVENTS
1fe5d5c3	71	extern int tick_broadcast_oneshot_control(enum tick_broadcast_state state);
37b64a42 TG	72	#else
	73	static inline int tick_broadcast_oneshot_control(enum tick_broadcast_state state)
	74	{
	75	return 0;
	76	}
	77	#endif
1fe5d5c3	78
592a438f TG	79	static inline void tick_broadcast_enable(void)
	80	{
	81	tick_broadcast_control(TICK_BROADCAST_ON);
	82	}
	83	static inline void tick_broadcast_disable(void)
	84	{
	85	tick_broadcast_control(TICK_BROADCAST_OFF);
	86	}
	87	static inline void tick_broadcast_force(void)
	88	{
	89	tick_broadcast_control(TICK_BROADCAST_FORCE);
	90	}
1fe5d5c3 TG	91	static inline int tick_broadcast_enter(void)
	92	{
	93	return tick_broadcast_oneshot_control(TICK_BROADCAST_ENTER);
	94	}
	95	static inline void tick_broadcast_exit(void)
	96	{
	97	tick_broadcast_oneshot_control(TICK_BROADCAST_EXIT);
	98	}
592a438f	99
d027d45d FW	100	enum tick_dep_bits {
	101	TICK_DEP_BIT_POSIX_TIMER = 0,
	102	TICK_DEP_BIT_PERF_EVENTS = 1,
	103	TICK_DEP_BIT_SCHED = 2,
	104	TICK_DEP_BIT_CLOCK_UNSTABLE = 3
	105	};
	106
e6e6cc22	107	#define TICK_DEP_MASK_NONE 0
d027d45d FW	108	#define TICK_DEP_MASK_POSIX_TIMER (1 << TICK_DEP_BIT_POSIX_TIMER)
	109	#define TICK_DEP_MASK_PERF_EVENTS (1 << TICK_DEP_BIT_PERF_EVENTS)
	110	#define TICK_DEP_MASK_SCHED (1 << TICK_DEP_BIT_SCHED)
	111	#define TICK_DEP_MASK_CLOCK_UNSTABLE (1 << TICK_DEP_BIT_CLOCK_UNSTABLE)
	112
c1797baf	113	#ifdef CONFIG_NO_HZ_COMMON
4cc7ecb7	114	extern bool tick_nohz_enabled;
c1797baf	115	extern int tick_nohz_tick_stopped(void);
1268fbc7	116	extern void tick_nohz_idle_enter(void);
280f0677 FW	117	extern void tick_nohz_idle_exit(void);
280f0677 FW	118	extern void tick_nohz_irq_exit(void);
4f86d3a8	119	extern ktime_t tick_nohz_get_sleep_length(void);
b7eaf1aa	120	extern unsigned long tick_nohz_get_idle_calls(void);
6378ddb5	121	extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time);
0224cf4c	122	extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time);
c1797baf	123	#else /* !CONFIG_NO_HZ_COMMON */
46373a15	124	#define tick_nohz_enabled (0)
c1797baf	125	static inline int tick_nohz_tick_stopped(void) { return 0; }
2bbb6817 FW	126	static inline void tick_nohz_idle_enter(void) { }
2bbb6817 FW	127	static inline void tick_nohz_idle_exit(void) { }
280f0677	128
4f86d3a8 LB	129	static inline ktime_t tick_nohz_get_sleep_length(void)
4f86d3a8 LB	130	{
2456e855	131	return NSEC_PER_SEC / HZ;
4f86d3a8	132	}
8083e4ad	133	static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return -1; }
0224cf4c	134	static inline u64 get_cpu_iowait_time_us(int cpu, u64 *unused) { return -1; }
c1797baf	135	#endif /* !CONFIG_NO_HZ_COMMON */
906568c9	136
c5bfece2	137	#ifdef CONFIG_NO_HZ_FULL
460775df FW	138	extern bool tick_nohz_full_running;
460775df FW	139	extern cpumask_var_t tick_nohz_full_mask;
c0f489d2	140	extern cpumask_var_t housekeeping_mask;
460775df FW	141
	142	static inline bool tick_nohz_full_enabled(void)
	143	{
58135f57	144	if (!context_tracking_is_enabled())
460775df FW	145	return false;
	146
	147	return tick_nohz_full_running;
	148	}
	149
	150	static inline bool tick_nohz_full_cpu(int cpu)
	151	{
	152	if (!tick_nohz_full_enabled())
	153	return false;
	154
	155	return cpumask_test_cpu(cpu, tick_nohz_full_mask);
	156	}
	157
83dedea8 CM	158	static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask)
	159	{
	160	if (tick_nohz_full_enabled())
	161	cpumask_or(mask, mask, tick_nohz_full_mask);
	162	}
	163
9642d18e VH	164	static inline int housekeeping_any_cpu(void)
	165	{
	166	return cpumask_any_and(housekeeping_mask, cpu_online_mask);
	167	}
	168
d027d45d FW	169	extern void tick_nohz_dep_set(enum tick_dep_bits bit);
	170	extern void tick_nohz_dep_clear(enum tick_dep_bits bit);
	171	extern void tick_nohz_dep_set_cpu(int cpu, enum tick_dep_bits bit);
	172	extern void tick_nohz_dep_clear_cpu(int cpu, enum tick_dep_bits bit);
	173	extern void tick_nohz_dep_set_task(struct task_struct *tsk,
	174	enum tick_dep_bits bit);
	175	extern void tick_nohz_dep_clear_task(struct task_struct *tsk,
	176	enum tick_dep_bits bit);
	177	extern void tick_nohz_dep_set_signal(struct signal_struct *signal,
	178	enum tick_dep_bits bit);
	179	extern void tick_nohz_dep_clear_signal(struct signal_struct *signal,
	180	enum tick_dep_bits bit);
	181
	182	/*
	183	* The below are tick_nohz_[set,clear]_dep() wrappers that optimize off-cases
	184	* on top of static keys.
	185	*/
	186	static inline void tick_dep_set(enum tick_dep_bits bit)
	187	{
	188	if (tick_nohz_full_enabled())
	189	tick_nohz_dep_set(bit);
	190	}
	191
	192	static inline void tick_dep_clear(enum tick_dep_bits bit)
	193	{
	194	if (tick_nohz_full_enabled())
	195	tick_nohz_dep_clear(bit);
	196	}
	197
	198	static inline void tick_dep_set_cpu(int cpu, enum tick_dep_bits bit)
	199	{
	200	if (tick_nohz_full_cpu(cpu))
	201	tick_nohz_dep_set_cpu(cpu, bit);
	202	}
	203
	204	static inline void tick_dep_clear_cpu(int cpu, enum tick_dep_bits bit)
	205	{
	206	if (tick_nohz_full_cpu(cpu))
	207	tick_nohz_dep_clear_cpu(cpu, bit);
	208	}
	209
	210	static inline void tick_dep_set_task(struct task_struct *tsk,
	211	enum tick_dep_bits bit)
	212	{
	213	if (tick_nohz_full_enabled())
	214	tick_nohz_dep_set_task(tsk, bit);
	215	}
	216	static inline void tick_dep_clear_task(struct task_struct *tsk,
	217	enum tick_dep_bits bit)
	218	{
	219	if (tick_nohz_full_enabled())
	220	tick_nohz_dep_clear_task(tsk, bit);
	221	}
	222	static inline void tick_dep_set_signal(struct signal_struct *signal,
	223	enum tick_dep_bits bit)
	224	{
	225	if (tick_nohz_full_enabled())
	226	tick_nohz_dep_set_signal(signal, bit);
	227	}
	228	static inline void tick_dep_clear_signal(struct signal_struct *signal,
	229	enum tick_dep_bits bit)
	230	{
	231	if (tick_nohz_full_enabled())
	232	tick_nohz_dep_clear_signal(signal, bit);
233	}
234
3d36aebc	235	extern void tick_nohz_full_kick_cpu(int cpu);
de734f89	236	extern void __tick_nohz_task_switch(void);
a831881b	237	#else
9642d18e VH	238	static inline int housekeeping_any_cpu(void)
	239	{
	240	return smp_processor_id();
	241	}
460775df FW	242	static inline bool tick_nohz_full_enabled(void) { return false; }
460775df FW	243	static inline bool tick_nohz_full_cpu(int cpu) { return false; }
83dedea8	244	static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) { }
d027d45d FW	245
	246	static inline void tick_dep_set(enum tick_dep_bits bit) { }
	247	static inline void tick_dep_clear(enum tick_dep_bits bit) { }
	248	static inline void tick_dep_set_cpu(int cpu, enum tick_dep_bits bit) { }
	249	static inline void tick_dep_clear_cpu(int cpu, enum tick_dep_bits bit) { }
	250	static inline void tick_dep_set_task(struct task_struct *tsk,
	251	enum tick_dep_bits bit) { }
	252	static inline void tick_dep_clear_task(struct task_struct *tsk,
	253	enum tick_dep_bits bit) { }
	254	static inline void tick_dep_set_signal(struct signal_struct *signal,
	255	enum tick_dep_bits bit) { }
	256	static inline void tick_dep_clear_signal(struct signal_struct *signal,
	257	enum tick_dep_bits bit) { }
	258
3d36aebc	259	static inline void tick_nohz_full_kick_cpu(int cpu) { }
de734f89	260	static inline void __tick_nohz_task_switch(void) { }
a831881b FW	261	#endif
a831881b FW	262
03f6199a CM	263	static inline const struct cpumask *housekeeping_cpumask(void)
	264	{
	265	#ifdef CONFIG_NO_HZ_FULL
	266	if (tick_nohz_full_enabled())
	267	return housekeeping_mask;
	268	#endif
	269	return cpu_possible_mask;
	270	}
	271
c0f489d2 PM	272	static inline bool is_housekeeping_cpu(int cpu)
	273	{
	274	#ifdef CONFIG_NO_HZ_FULL
	275	if (tick_nohz_full_enabled())
	276	return cpumask_test_cpu(cpu, housekeeping_mask);
	277	#endif
	278	return true;
	279	}
	280
	281	static inline void housekeeping_affine(struct task_struct *t)
	282	{
	283	#ifdef CONFIG_NO_HZ_FULL
	284	if (tick_nohz_full_enabled())
	285	set_cpus_allowed_ptr(t, housekeeping_mask);
	286
	287	#endif
	288	}
	289
de734f89	290	static inline void tick_nohz_task_switch(void)
d13508f9 FW	291	{
d13508f9 FW	292	if (tick_nohz_full_enabled())
de734f89	293	__tick_nohz_task_switch();
d13508f9 FW	294	}
d13508f9 FW	295
906568c9	296	#endif