Commit efca03ec authored Aug 16, 2016 by seokhoon.yoon Committed by Ingo Molnar Sep 05, 2016

schedcore: Remove duplicated init_task's preempt_notifiers init



init_task's preempt_notifiers is initialized twice:

1) sched_init()
   -> INIT_HLIST_HEAD(&init_task.preempt_notifiers)

2) sched_init()
   -> init_idle(current,) <--- current task is init_task at this time
    -> __sched_fork(,current)
     -> INIT_HLIST_HEAD(&p->preempt_notifiers)

I think the first one is unnecessary, so remove it.

Signed-off-by: seokhoon.yoon <iamyooon@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1471339568-5790-1-git-send-email-iamyooon@gmail.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 26656215

kernel/sched/core.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -7554,10 +7554,6 @@ void __init sched_init(void)

		set_load_weight(&init_task);

		#ifdef CONFIG_PREEMPT_NOTIFIERS
		INIT_HLIST_HEAD(&init_task.preempt_notifiers);
		#endif

		/*
		* The boot idle thread does lazy MMU switching as well:
		*/

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