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sched: Add task_struct pointer to sched_class::set_curr_task

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In preparation of further separating pick_next_task() and
set_curr_task() we have to pass the actual task into it, while there,
rename the thing to better pair with put_prev_task().

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Aaron Lu <aaron.lwe@gmail.com>
Cc: Valentin Schneider <valentin.schneider@arm.com>
Cc: mingo@kernel.org
Cc: Phil Auld <pauld@redhat.com>
Cc: Julien Desfossez <jdesfossez@digitalocean.com>
Cc: Nishanth Aravamudan <naravamudan@digitalocean.com>
Link: https://lkml.kernel.org/r/a96d1bcdd716db4a4c5da2fece647a1456c0ed78.1559129225.git.vpillai@digitalocean.com
This commit is contained in:
Peter Zijlstra
2019-05-29 20:36:41 +00:00
parent 10e7071b2f
commit 03b7fad167
7 changed files with 49 additions and 47 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
kernel/sched/idle.c
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@ -374,14 +374,25 @@ static void check_preempt_curr_idle(struct rq *rq, struct task_struct *p, int fl
resched_curr(rq);
}
static void put_prev_task_idle(struct rq *rq, struct task_struct *prev)
{
}
static void set_next_task_idle(struct rq *rq, struct task_struct *next)
{
update_idle_core(rq);
schedstat_inc(rq->sched_goidle);
}
static struct task_struct *
pick_next_task_idle(struct rq *rq, struct task_struct *prev, struct rq_flags *rf)
{
put_prev_task(rq, prev);
update_idle_core(rq);
schedstat_inc(rq->sched_goidle);
struct task_struct *next = rq->idle;
return rq->idle;
put_prev_task(rq, prev);
set_next_task_idle(rq, next);
return next;
}
/*
@ -397,10 +408,6 @@ dequeue_task_idle(struct rq *rq, struct task_struct *p, int flags)
raw_spin_lock_irq(&rq->lock);
}
static void put_prev_task_idle(struct rq *rq, struct task_struct *prev)
{
}
/*
* scheduler tick hitting a task of our scheduling class.
*
@ -413,10 +420,6 @@ static void task_tick_idle(struct rq *rq, struct task_struct *curr, int queued)
{
}
static void set_curr_task_idle(struct rq *rq)
{
}
static void switched_to_idle(struct rq *rq, struct task_struct *p)
{
BUG();
@ -451,13 +454,13 @@ const struct sched_class idle_sched_class = {
.pick_next_task = pick_next_task_idle,
.put_prev_task = put_prev_task_idle,
.set_next_task = set_next_task_idle,
#ifdef CONFIG_SMP
.select_task_rq = select_task_rq_idle,
.set_cpus_allowed = set_cpus_allowed_common,
#endif
.set_curr_task = set_curr_task_idle,
.task_tick = task_tick_idle,
.get_rr_interval = get_rr_interval_idle,