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Commit 1b537c7d authored by Yao Dongdong's avatar Yao Dongdong Committed by Ingo Molnar
Browse files

sched/core: Remove check of p->sched_class 



Search all usage of p->sched_class in sched/core.c, no one check it
before use, so it seems that every task must belong to one sched_class.

Signed-off-by: default avatarYao Dongdong <yaodongdong@huawei.com>
[ Moved the early class assignment to make it boot. ]
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1419835303-28958-1-git-send-email-yaodongdong@huawei.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent bb04159d

kernel/sched/core.c

+6 −6
Original line number Diff line number Diff line
@@ -4744,7 +4744,7 @@ static struct rq *move_queued_task(struct task_struct *p, int new_cpu) 


void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask)

{

	if (p->sched_class && p->sched_class->set_cpus_allowed)

	if (p->sched_class->set_cpus_allowed)

		p->sched_class->set_cpus_allowed(p, new_mask);



	cpumask_copy(&p->cpus_allowed, new_mask);
@@ -7253,6 +7253,11 @@ void __init sched_init(void) 
	atomic_inc(&init_mm.mm_count);

	enter_lazy_tlb(&init_mm, current);



	/*

	 * During early bootup we pretend to be a normal task:

	 */

	current->sched_class = &fair_sched_class;



	/*

	 * Make us the idle thread. Technically, schedule() should not be

	 * called from this thread, however somewhere below it might be,
@@ -7263,11 +7268,6 @@ void __init sched_init(void) 


	calc_load_update = jiffies + LOAD_FREQ;



	/*

	 * During early bootup we pretend to be a normal task:

	 */

	current->sched_class = &fair_sched_class;



#ifdef CONFIG_SMP

	zalloc_cpumask_var(&sched_domains_tmpmask, GFP_NOWAIT);

	/* May be allocated at isolcpus cmdline parse time */