sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>

We are going to split <linux/sched/debug.h> out of <linux/sched.h>, which
will have to be picked up from other headers and a couple of .c files.

Create a trivial placeholder <linux/sched/debug.h> file that just
maps to <linux/sched.h> to make this patch obviously correct and
bisectable.

Include the new header in the files that are going to need it.

Acked-by: Linus Torvalds <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Signed-off-by: Ingo Molnar <[email protected]>

kernel/sched/completion.c

@@ -12,6 +12,7 @@
  */
 
 #include <linux/sched/signal.h>
+#include <linux/sched/debug.h>
 #include <linux/completion.h>
 
 /**

kernel/sched/sched.h

@@ -11,6 +11,7 @@
 #include <linux/sched/cpufreq.h>
 #include <linux/sched/stat.h>
 #include <linux/sched/nohz.h>
+#include <linux/sched/debug.h>
 #include <linux/u64_stats_sync.h>
 #include <linux/sched/deadline.h>
 #include <linux/kernel_stat.h>
@@ -1830,7 +1831,6 @@ extern void print_rt_stats(struct seq_file *m, int cpu);
 extern void print_dl_stats(struct seq_file *m, int cpu);
 extern void
 print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq);
-
 #ifdef CONFIG_NUMA_BALANCING
 extern void
 show_numa_stats(struct task_struct *p, struct seq_file *m);

kernel/sched/wait.c

@@ -6,6 +6,7 @@
 #include <linux/init.h>
 #include <linux/export.h>
 #include <linux/sched/signal.h>
+#include <linux/sched/debug.h>
 #include <linux/mm.h>
 #include <linux/wait.h>
 #include <linux/hash.h>