This source file includes following definitions.
- select_task_rq_stop
- balance_stop
- check_preempt_curr_stop
- set_next_task_stop
- pick_next_task_stop
- enqueue_task_stop
- dequeue_task_stop
- yield_task_stop
- put_prev_task_stop
- task_tick_stop
- switched_to_stop
- prio_changed_stop
- get_rr_interval_stop
- update_curr_stop
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10 #include "sched.h"
11
12 #ifdef CONFIG_SMP
13 static int
14 select_task_rq_stop(struct task_struct *p, int cpu, int sd_flag, int flags)
15 {
16 return task_cpu(p);
17 }
18
19 static int
20 balance_stop(struct rq *rq, struct task_struct *prev, struct rq_flags *rf)
21 {
22 return sched_stop_runnable(rq);
23 }
24 #endif
25
26 static void
27 check_preempt_curr_stop(struct rq *rq, struct task_struct *p, int flags)
28 {
29
30 }
31
32 static void set_next_task_stop(struct rq *rq, struct task_struct *stop, bool first)
33 {
34 stop->se.exec_start = rq_clock_task(rq);
35 }
36
37 static struct task_struct *
38 pick_next_task_stop(struct rq *rq, struct task_struct *prev, struct rq_flags *rf)
39 {
40 WARN_ON_ONCE(prev || rf);
41
42 if (!sched_stop_runnable(rq))
43 return NULL;
44
45 set_next_task_stop(rq, rq->stop, true);
46 return rq->stop;
47 }
48
49 static void
50 enqueue_task_stop(struct rq *rq, struct task_struct *p, int flags)
51 {
52 add_nr_running(rq, 1);
53 }
54
55 static void
56 dequeue_task_stop(struct rq *rq, struct task_struct *p, int flags)
57 {
58 sub_nr_running(rq, 1);
59 }
60
61 static void yield_task_stop(struct rq *rq)
62 {
63 BUG();
64 }
65
66 static void put_prev_task_stop(struct rq *rq, struct task_struct *prev)
67 {
68 struct task_struct *curr = rq->curr;
69 u64 delta_exec;
70
71 delta_exec = rq_clock_task(rq) - curr->se.exec_start;
72 if (unlikely((s64)delta_exec < 0))
73 delta_exec = 0;
74
75 schedstat_set(curr->se.statistics.exec_max,
76 max(curr->se.statistics.exec_max, delta_exec));
77
78 curr->se.sum_exec_runtime += delta_exec;
79 account_group_exec_runtime(curr, delta_exec);
80
81 curr->se.exec_start = rq_clock_task(rq);
82 cgroup_account_cputime(curr, delta_exec);
83 }
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93 static void task_tick_stop(struct rq *rq, struct task_struct *curr, int queued)
94 {
95 }
96
97 static void switched_to_stop(struct rq *rq, struct task_struct *p)
98 {
99 BUG();
100 }
101
102 static void
103 prio_changed_stop(struct rq *rq, struct task_struct *p, int oldprio)
104 {
105 BUG();
106 }
107
108 static unsigned int
109 get_rr_interval_stop(struct rq *rq, struct task_struct *task)
110 {
111 return 0;
112 }
113
114 static void update_curr_stop(struct rq *rq)
115 {
116 }
117
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119
120
121 const struct sched_class stop_sched_class = {
122 .next = &dl_sched_class,
123
124 .enqueue_task = enqueue_task_stop,
125 .dequeue_task = dequeue_task_stop,
126 .yield_task = yield_task_stop,
127
128 .check_preempt_curr = check_preempt_curr_stop,
129
130 .pick_next_task = pick_next_task_stop,
131 .put_prev_task = put_prev_task_stop,
132 .set_next_task = set_next_task_stop,
133
134 #ifdef CONFIG_SMP
135 .balance = balance_stop,
136 .select_task_rq = select_task_rq_stop,
137 .set_cpus_allowed = set_cpus_allowed_common,
138 #endif
139
140 .task_tick = task_tick_stop,
141
142 .get_rr_interval = get_rr_interval_stop,
143
144 .prio_changed = prio_changed_stop,
145 .switched_to = switched_to_stop,
146 .update_curr = update_curr_stop,
147 };