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Commit 1df21055 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

sched: add init_idle_bootup_task() 



add the init_idle_bootup_task() callback to the bootup thread,
unused at the moment. (CFS will use it to switch the scheduling
class of the boot thread to the idle class)

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 4da1ce6d

include/linux/sched.h

+1 −0
Original line number Diff line number Diff line
@@ -195,6 +195,7 @@ struct task_struct; 
extern void sched_init(void);

extern void sched_init_smp(void);

extern void init_idle(struct task_struct *idle, int cpu);

extern void init_idle_bootup_task(struct task_struct *idle);



extern cpumask_t nohz_cpu_mask;

#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)

init/main.c

+3 −2
Original line number Diff line number Diff line
@@ -436,8 +436,9 @@ static void noinline __init_refok rest_init(void) 


	/*

	 * The boot idle thread must execute schedule()

	 * at least one to get things moving:

	 * at least once to get things moving:

	 */

	init_idle_bootup_task(current);

	preempt_enable_no_resched();

	schedule();

	preempt_disable();

kernel/sched.c

+5 −0
Original line number Diff line number Diff line
@@ -5018,6 +5018,11 @@ void show_state_filter(unsigned long state_filter) 
		debug_show_all_locks();

}



void __cpuinit init_idle_bootup_task(struct task_struct *idle)

{

	/* nothing yet */

}



/**

 * init_idle - set up an idle thread for a given CPU

 * @idle: task in question