Commit 752b3ca7 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

sched/headers: Move the NOHZ APIs from <linux/sched.h> to <linux/sched/nohz.h> 



There's a number of NOHZ/dyntics related functionality in <linux/sched.h>,
but only a handful of timer files are making use of them.

Move them into their own header. This better documents these APIs
and unclutters <linux/sched.h>.

Acked-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 3605df49

include/linux/sched.h

+0 −35
Original line number Diff line number Diff line
@@ -46,14 +46,6 @@ struct nameidata; 
struct signal_struct;

struct sighand_struct;



#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)

extern void cpu_load_update_nohz_start(void);

extern void cpu_load_update_nohz_stop(void);

#else

static inline void cpu_load_update_nohz_start(void) { }

static inline void cpu_load_update_nohz_stop(void) { }

#endif



extern void dump_cpu_task(int cpu);



struct seq_file;
@@ -204,15 +196,6 @@ extern cpumask_var_t cpu_isolated_map; 


extern int runqueue_is_locked(int cpu);



#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)

extern void nohz_balance_enter_idle(int cpu);

extern void set_cpu_sd_state_idle(void);

extern int get_nohz_timer_target(void);

#else

static inline void nohz_balance_enter_idle(int cpu) { }

static inline void set_cpu_sd_state_idle(void) { }

#endif



/*

 * Only dump TASK_* tasks. (0 for all tasks)

 */
@@ -1535,14 +1518,6 @@ static inline int set_cpus_allowed_ptr(struct task_struct *p, 
}

#endif



#ifdef CONFIG_NO_HZ_COMMON

void calc_load_enter_idle(void);

void calc_load_exit_idle(void);

#else

static inline void calc_load_enter_idle(void) { }

static inline void calc_load_exit_idle(void) { }

#endif /* CONFIG_NO_HZ_COMMON */



#ifndef cpu_relax_yield

#define cpu_relax_yield() cpu_relax()

#endif
@@ -1563,16 +1538,6 @@ extern void idle_task_exit(void); 
static inline void idle_task_exit(void) {}

#endif



#if defined(CONFIG_NO_HZ_COMMON) && defined(CONFIG_SMP)

extern void wake_up_nohz_cpu(int cpu);

#else

static inline void wake_up_nohz_cpu(int cpu) { }

#endif



#ifdef CONFIG_NO_HZ_FULL

extern u64 scheduler_tick_max_deferment(void);

#endif



extern int yield_to(struct task_struct *p, bool preempt);

extern void set_user_nice(struct task_struct *p, long nice);

extern int task_prio(const struct task_struct *p);

include/linux/sched/nohz.h

+39 −0
Original line number Diff line number Diff line
@@ -3,4 +3,43 @@ 


#include <linux/sched.h>



/*

 * This is the interface between the scheduler and nohz/dyntics:

 */



#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)

extern void cpu_load_update_nohz_start(void);

extern void cpu_load_update_nohz_stop(void);

#else

static inline void cpu_load_update_nohz_start(void) { }

static inline void cpu_load_update_nohz_stop(void) { }

#endif



#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)

extern void nohz_balance_enter_idle(int cpu);

extern void set_cpu_sd_state_idle(void);

extern int get_nohz_timer_target(void);

#else

static inline void nohz_balance_enter_idle(int cpu) { }

static inline void set_cpu_sd_state_idle(void) { }

#endif



#ifdef CONFIG_NO_HZ_COMMON

void calc_load_enter_idle(void);

void calc_load_exit_idle(void);

#else

static inline void calc_load_enter_idle(void) { }

static inline void calc_load_exit_idle(void) { }

#endif /* CONFIG_NO_HZ_COMMON */



#if defined(CONFIG_NO_HZ_COMMON) && defined(CONFIG_SMP)

extern void wake_up_nohz_cpu(int cpu);

#else

static inline void wake_up_nohz_cpu(int cpu) { }

#endif



#ifdef CONFIG_NO_HZ_FULL

extern u64 scheduler_tick_max_deferment(void);

#endif



#endif /* _LINUX_SCHED_NOHZ_H */

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