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sched_ext: Allow dequeue_task_scx to fail

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Since dequeue_task() allowed to fail, there is a compile error:

kernel/sched/ext.c:3630:19: error: initialization of ‘bool (*)(struct rq*, struct task_struct *, int)’ {aka ‘_Bool (*)(struct rq *, struct task_struct *, int)’} from incompatible pointer type ‘void (*)(struct rq*, struct task_struct *, int)’
  3630 |  .dequeue_task  = dequeue_task_scx,
       |                   ^~~~~~~~~~~~~~~~

Allow dequeue_task_scx to fail too.

Fixes: 863ccdbb91 ("sched: Allow sched_class::dequeue_task() to fail")
Signed-off-by: Yipeng Zou <zouyipeng@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Yipeng Zou 2024-08-20 10:45:31 +08:00 committed by Tejun Heo
parent 5ac998574f
commit 9ad2861b77
1 changed files with 3 additions and 2 deletions
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5
kernel/sched/ext.c
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@ -2033,11 +2033,11 @@ static void ops_dequeue(struct task_struct *p, u64 deq_flags)
}
}
static void dequeue_task_scx(struct rq *rq, struct task_struct *p, int deq_flags)
static bool dequeue_task_scx(struct rq *rq, struct task_struct *p, int deq_flags)
{
if (!(p->scx.flags & SCX_TASK_QUEUED)) {
WARN_ON_ONCE(task_runnable(p));
return;
return true;
}
ops_dequeue(p, deq_flags);
@ -2072,6 +2072,7 @@ static void dequeue_task_scx(struct rq *rq, struct task_struct *p, int deq_flags
sub_nr_running(rq, 1);
dispatch_dequeue(rq, p);
return true;
}
static void yield_task_scx(struct rq *rq)