Commit-ID: 1b537c7d1e58c761212a193085f9049b58f672e6
Gitweb: http://git.kernel.org/tip/1b537c7d1e58c761212a193085f9049b58f672e6
Author: Yao Dongdong <yaodongdong@xxxxxxxxxx>
AuthorDate: Mon, 29 Dec 2014 14:41:43 +0800
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 14 Jan 2015 13:34:17 +0100
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: Yao Dongdong <yaodongdong@xxxxxxxxxx>
[ Moved the early class assignment to make it boot. ]
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1419835303-28958-1-git-send-email-yaodongdong@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/sched/core.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 95ac795..46a2345 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -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);
@@ -7254,6 +7254,11 @@ void __init sched_init(void)
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,
* but because we are the idle thread, we just pick up running again
@@ -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 */
--
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