From 1df21055e34b6a68d62cf0c524b9e52deebd7ead Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 9 Jul 2007 18:51:58 +0200
Subject: [PATCH] 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: Ingo Molnar <mingo@elte.hu>
---
include/linux/sched.h | 1 +
init/main.c | 5 +++--
kernel/sched.c | 5 +++++
3 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4b912e753ca0..61a111fe2b7a 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -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)
diff --git a/init/main.c b/init/main.c
index eb8bdbae4fc7..0eb1c7463fe4 100644
--- a/init/main.c
+++ b/init/main.c
@@ -436,15 +436,16 @@ 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();
/* Call into cpu_idle with preempt disabled */
cpu_idle();
-}
+}
/* Check for early params. */
static int __init do_early_param(char *param, char *val)
diff --git a/kernel/sched.c b/kernel/sched.c
index 7090982350d3..ac4d26241d1e 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -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
--
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