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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

17
kernel/sched/stop_task.c
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@@ -23,6 +23,11 @@ check_preempt_curr_stop(struct rq *rq, struct task_struct *p, int flags)
/* we're never preempted */
}
static void set_next_task_stop(struct rq *rq, struct task_struct *stop)
{
stop->se.exec_start = rq_clock_task(rq);
}
static struct task_struct *
pick_next_task_stop(struct rq *rq, struct task_struct *prev, struct rq_flags *rf)
{
@@ -32,8 +37,7 @@ pick_next_task_stop(struct rq *rq, struct task_struct *prev, struct rq_flags *rf
return NULL;
put_prev_task(rq, prev);
stop->se.exec_start = rq_clock_task(rq);
set_next_task_stop(rq, stop);
return stop;
}
@@ -86,13 +90,6 @@ static void task_tick_stop(struct rq *rq, struct task_struct *curr, int queued)
{
}
static void set_curr_task_stop(struct rq *rq)
{
struct task_struct *stop = rq->stop;
stop->se.exec_start = rq_clock_task(rq);
}
static void switched_to_stop(struct rq *rq, struct task_struct *p)
{
BUG(); /* its impossible to change to this class */
@@ -128,13 +125,13 @@ const struct sched_class stop_sched_class = {
.pick_next_task = pick_next_task_stop,
.put_prev_task = put_prev_task_stop,
.set_next_task = set_next_task_stop,
#ifdef CONFIG_SMP
.select_task_rq = select_task_rq_stop,
.set_cpus_allowed = set_cpus_allowed_common,
#endif
.set_curr_task = set_curr_task_stop,
.task_tick = task_tick_stop,
.get_rr_interval = get_rr_interval_stop,