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sched/core: Remove check of p->sched_class

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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: Yao Dongdong <yaodongdong@huawei.com>
[ Moved the early class assignment to make it boot. ]
Signed-off-by: Peter 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: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Yao Dongdong 2014-12-29 14:41:43 +08:00 • committed by Ingo Molnar
parent bb04159df9
commit 1b537c7d1e
1 changed files with 6 additions and 6 deletions
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12
kernel/sched/core.c
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@ -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) 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); p->sched_class->set_cpus_allowed(p, new_mask);
cpumask_copy(&p->cpus_allowed, new_mask); cpumask_copy(&p->cpus_allowed, new_mask);
@ -7253,6 +7253,11 @@ void __init sched_init(void)
atomic_inc(&init_mm.mm_count); atomic_inc(&init_mm.mm_count);
enter_lazy_tlb(&init_mm, current); 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 * Make us the idle thread. Technically, schedule() should not be
* called from this thread, however somewhere below it might 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; 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 #ifdef CONFIG_SMP
zalloc_cpumask_var(&sched_domains_tmpmask, GFP_NOWAIT); zalloc_cpumask_var(&sched_domains_tmpmask, GFP_NOWAIT);
/* May be allocated at isolcpus cmdline parse time */ /* May be allocated at isolcpus cmdline parse time */