sched/headers: Reorganize, clean up and optimize kernel/sched/core.c dependencies

Use all generic headers from kernel/sched/sched.h that are required
for it to build.

Sort the sections alphabetically.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Peter Zijlstra <peterz@infradead.org>

kernel/sched/core.c

@@ -6,7 +6,73 @@
  *
  *  Copyright (C) 1991-2002  Linus Torvalds
  */
+#include <linux/highmem.h>
+#include <linux/hrtimer_api.h>
+#include <linux/ktime_api.h>
+#include <linux/sched/signal.h>
+#include <linux/syscalls_api.h>
+#include <linux/debug_locks.h>
+#include <linux/prefetch.h>
+#include <linux/capability.h>
+#include <linux/pgtable_api.h>
+#include <linux/wait_bit.h>
+#include <linux/jiffies.h>
+#include <linux/spinlock_api.h>
+#include <linux/cpumask_api.h>
+#include <linux/lockdep_api.h>
+#include <linux/hardirq.h>
+#include <linux/softirq.h>
+#include <linux/refcount_api.h>
+#include <linux/topology.h>
+#include <linux/sched/clock.h>
+#include <linux/sched/cond_resched.h>
+#include <linux/sched/debug.h>
+#include <linux/sched/isolation.h>
+#include <linux/sched/loadavg.h>
+#include <linux/sched/mm.h>
+#include <linux/sched/nohz.h>
+#include <linux/sched/rseq_api.h>
+#include <linux/sched/rt.h>
+
+#include <linux/blkdev.h>
+#include <linux/context_tracking.h>
+#include <linux/cpuset.h>
+#include <linux/delayacct.h>
+#include <linux/init_task.h>
+#include <linux/interrupt.h>
+#include <linux/ioprio.h>
+#include <linux/kallsyms.h>
+#include <linux/kcov.h>
+#include <linux/kprobes.h>
+#include <linux/llist_api.h>
+#include <linux/mmu_context.h>
+#include <linux/mmzone.h>
+#include <linux/mutex_api.h>
+#include <linux/nmi.h>
+#include <linux/nospec.h>
+#include <linux/perf_event_api.h>
+#include <linux/profile.h>
+#include <linux/psi.h>
+#include <linux/rcuwait_api.h>
+#include <linux/sched/wake_q.h>
+#include <linux/scs.h>
+#include <linux/slab.h>
+#include <linux/syscalls.h>
+#include <linux/vtime.h>
+#include <linux/wait_api.h>
+#include <linux/workqueue_api.h>
+
+#ifdef CONFIG_PREEMPT_DYNAMIC
+# include <linux/entry-common.h>
+#endif
+
+#include <uapi/linux/sched/types.h>
+
+#include <asm/switch_to.h>
+#include <asm/tlb.h>
+
 #define CREATE_TRACE_POINTS
+#include <linux/sched/rseq_api.h>
 #include <trace/events/sched.h>
 #undef CREATE_TRACE_POINTS
 
@@ -14,22 +80,15 @@
 #include "stats.h"
 #include "autogroup.h"
 
-#include <linux/nospec.h>
-#include <linux/blkdev.h>
-#include <linux/jump_label.h>
-#include <linux/kcov.h>
-#include <linux/scs.h>
-
-#include <asm/switch_to.h>
-#include <asm/tlb.h>
+#include "autogroup.h"
+#include "pelt.h"
+#include "smp.h"
+#include "stats.h"
 
 #include "../workqueue_internal.h"
 #include "../../fs/io-wq.h"
 #include "../smpboot.h"
 
-#include "pelt.h"
-#include "smp.h"
-
 /*
  * Export tracepoints that act as a bare tracehook (ie: have no trace event
  * associated with them) to allow external modules to probe them.