sched: Make separate sched*.c translation units

Since once needs to do something at conferences and fixing compile
warnings doesn't actually require much if any attention I decided
to break up the sched.c #include "*.c" fest.

This further modularizes the scheduler code.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-x0fcd3mnp8f9c99grcpewmhi@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>

14 files changed, 2034 insertions, 1954 deletions

diff --git a/include/linux/latencytop.h b/include/linux/latencytop.h
index b0e99898527c..e23121f9d82a 100644
--- a/include/linux/latencytop.h
+++ b/include/linux/latencytop.h
@@ -10,6 +10,8 @@
 #define _INCLUDE_GUARD_LATENCYTOP_H_
 
 #include <linux/compiler.h>
+struct task_struct;
+
 #ifdef CONFIG_LATENCYTOP
 
 #define LT_SAVECOUNT            32
@@ -23,7 +25,6 @@ struct latency_record {
 };
 
 
-struct task_struct;
 
 extern int latencytop_enabled;
 void __account_scheduler_latency(struct task_struct *task, int usecs, int inter);
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 68daf4f27e2c..8db17b7622ec 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -925,6 +925,15 @@ static inline struct cpumask *sched_group_cpus(struct sched_group *sg)
         return to_cpumask(sg->cpumask);
 }
 
+/**
+ * group_first_cpu - Returns the first cpu in the cpumask of a sched_group.
+ * @group: The group whose first cpu is to be returned.
+ */
+static inline unsigned int group_first_cpu(struct sched_group *group)
+{
+        return cpumask_first(sched_group_cpus(group));
+}
+
 struct sched_domain_attr {
         int relax_domain_level;
 };
diff --git a/kernel/Makefile b/kernel/Makefile
index e898c5b9d02c..1a4d37d7f39a 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the linux kernel.
 #
 
-obj-y     = sched.o fork.o exec_domain.o panic.o printk.o \
+obj-y     = fork.o exec_domain.o panic.o printk.o \
             cpu.o exit.o itimer.o time.o softirq.o resource.o \
             sysctl.o sysctl_binary.o capability.o ptrace.o timer.o user.o \
             signal.o sys.o kmod.o workqueue.o pid.o \
@@ -10,8 +10,12 @@ obj-y     = sched.o fork.o exec_domain.o panic.o printk.o \
             kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \
             hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \
             notifier.o ksysfs.o sched_clock.o cred.o \
-            async.o range.o
-obj-y += groups.o
+            async.o range.o groups.o
+
+obj-y += sched.o sched_idletask.o sched_fair.o sched_rt.o sched_stoptask.o
+obj-$(CONFIG_SCHED_AUTOGROUP) += sched_autogroup.o
+obj-$(CONFIG_SCHEDSTATS) += sched_stats.o
+obj-$(CONFIG_SCHED_DEBUG) += sched_debug.o
 
 ifdef CONFIG_FUNCTION_TRACER
 # Do not trace debug files and internal ftrace files
diff --git a/kernel/sched.c b/kernel/sched.c
index c9e3ab6e299e..2ffcceed8862 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -56,7 +56,6 @@
 #include <linux/percpu.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
-#include <linux/stop_machine.h>
 #include <linux/sysctl.h>
 #include <linux/syscalls.h>
 #include <linux/times.h>
@@ -72,133 +71,20 @@
 #include <linux/ftrace.h>
 #include <linux/slab.h>
 #include <linux/init_task.h>
-#include <linux/jump_label.h>
 
 #include <asm/tlb.h>
 #include <asm/irq_regs.h>
-#include <asm/mutex.h>
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #endif
 
-#include "sched_cpupri.h"
+#include "sched.h"
 #include "workqueue_sched.h"
-#include "sched_autogroup.h"
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/sched.h>
 
-/*
- * Convert user-nice values [ -20 ... 0 ... 19 ]
- * to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
- * and back.
- */
-#define NICE_TO_PRIO(nice)      (MAX_RT_PRIO + (nice) + 20)
-#define PRIO_TO_NICE(prio)      ((prio) - MAX_RT_PRIO - 20)
-#define TASK_NICE(p)            PRIO_TO_NICE((p)->static_prio)
-
-/*
- * 'User priority' is the nice value converted to something we
- * can work with better when scaling various scheduler parameters,
- * it's a [ 0 ... 39 ] range.
- */
-#define USER_PRIO(p)            ((p)-MAX_RT_PRIO)
-#define TASK_USER_PRIO(p)       USER_PRIO((p)->static_prio)
-#define MAX_USER_PRIO           (USER_PRIO(MAX_PRIO))
-
-/*
- * Helpers for converting nanosecond timing to jiffy resolution
- */
-#define NS_TO_JIFFIES(TIME)     ((unsigned long)(TIME) / (NSEC_PER_SEC / HZ))
-
-#define NICE_0_LOAD             SCHED_LOAD_SCALE
-#define NICE_0_SHIFT            SCHED_LOAD_SHIFT
-
-/*
- * These are the 'tuning knobs' of the scheduler:
- *
- * default timeslice is 100 msecs (used only for SCHED_RR tasks).
- * Timeslices get refilled after they expire.
- */
-#define DEF_TIMESLICE           (100 * HZ / 1000)
-
-/*
- * single value that denotes runtime == period, ie unlimited time.
- */
-#define RUNTIME_INF     ((u64)~0ULL)
-
-static inline int rt_policy(int policy)
-{
-        if (policy == SCHED_FIFO || policy == SCHED_RR)
-                return 1;
-        return 0;
-}
-
-static inline int task_has_rt_policy(struct task_struct *p)
-{
-        return rt_policy(p->policy);
-}
-
-/*
- * This is the priority-queue data structure of the RT scheduling class:
- */
-struct rt_prio_array {
-        DECLARE_BITMAP(bitmap, MAX_RT_PRIO+1); /* include 1 bit for delimiter */
-        struct list_head queue[MAX_RT_PRIO];
-};
-
-struct rt_bandwidth {
-        /* nests inside the rq lock: */
-        raw_spinlock_t          rt_runtime_lock;
-        ktime_t                 rt_period;
-        u64                     rt_runtime;
-        struct hrtimer          rt_period_timer;
-};
-
-static struct rt_bandwidth def_rt_bandwidth;
-
-static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun);
+void start_bandwidth_timer(struct hrtimer *period_timer, ktime_t period)