Contributors: 12
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ingo Molnar |
156 |
52.70% |
6 |
26.09% |
| Peter Zijlstra |
98 |
33.11% |
5 |
21.74% |
| Jeremy Fitzhardinge |
20 |
6.76% |
1 |
4.35% |
| Thomas Gleixner |
5 |
1.69% |
2 |
8.70% |
| Rafael J. Wysocki |
5 |
1.69% |
2 |
8.70% |
| David Howells |
4 |
1.35% |
1 |
4.35% |
| Arjan van de Ven |
2 |
0.68% |
1 |
4.35% |
| Nicholas Piggin |
2 |
0.68% |
1 |
4.35% |
| Mel Gorman |
1 |
0.34% |
1 |
4.35% |
| Tim Chen |
1 |
0.34% |
1 |
4.35% |
| Kirill V Tkhai |
1 |
0.34% |
1 |
4.35% |
| Greg Kroah-Hartman |
1 |
0.34% |
1 |
4.35% |
| Total |
296 |
|
23 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_SCHED_IDLE_H
#define _LINUX_SCHED_IDLE_H
#include <linux/sched.h>
enum cpu_idle_type {
__CPU_NOT_IDLE = 0,
CPU_IDLE,
CPU_NEWLY_IDLE,
CPU_MAX_IDLE_TYPES
};
#ifdef CONFIG_SMP
extern void wake_up_if_idle(int cpu);
#else
static inline void wake_up_if_idle(int cpu) { }
#endif
/*
* Idle thread specific functions to determine the need_resched
* polling state.
*/
#ifdef TIF_POLLING_NRFLAG
#ifdef _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMIC_H
static __always_inline void __current_set_polling(void)
{
arch_set_bit(TIF_POLLING_NRFLAG,
(unsigned long *)(¤t_thread_info()->flags));
}
static __always_inline void __current_clr_polling(void)
{
arch_clear_bit(TIF_POLLING_NRFLAG,
(unsigned long *)(¤t_thread_info()->flags));
}
#else
static __always_inline void __current_set_polling(void)
{
set_bit(TIF_POLLING_NRFLAG,
(unsigned long *)(¤t_thread_info()->flags));
}
static __always_inline void __current_clr_polling(void)
{
clear_bit(TIF_POLLING_NRFLAG,
(unsigned long *)(¤t_thread_info()->flags));
}
#endif /* _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMIC_H */
static __always_inline bool __must_check current_set_polling_and_test(void)
{
__current_set_polling();
/*
* Polling state must be visible before we test NEED_RESCHED,
* paired by resched_curr()
*/
smp_mb__after_atomic();
return unlikely(tif_need_resched());
}
static __always_inline bool __must_check current_clr_polling_and_test(void)
{
__current_clr_polling();
/*
* Polling state must be visible before we test NEED_RESCHED,
* paired by resched_curr()
*/
smp_mb__after_atomic();
return unlikely(tif_need_resched());
}
#else
static inline void __current_set_polling(void) { }
static inline void __current_clr_polling(void) { }
static inline bool __must_check current_set_polling_and_test(void)
{
return unlikely(tif_need_resched());
}
static inline bool __must_check current_clr_polling_and_test(void)
{
return unlikely(tif_need_resched());
}
#endif
static __always_inline void current_clr_polling(void)
{
__current_clr_polling();
/*
* Ensure we check TIF_NEED_RESCHED after we clear the polling bit.
* Once the bit is cleared, we'll get IPIs with every new
* TIF_NEED_RESCHED and the IPI handler, scheduler_ipi(), will also
* fold.
*/
smp_mb(); /* paired with resched_curr() */
preempt_fold_need_resched();
}
#endif /* _LINUX_SCHED_IDLE_H */