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

We are going to split <linux/sched/topology.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/topology.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/fair.c

@@ -21,6 +21,8 @@
  */
 
 #include <linux/sched.h>
+#include <linux/sched/topology.h>
+
 #include <linux/latencytop.h>
 #include <linux/cpumask.h>
 #include <linux/cpuidle.h>

kernel/sched/sched.h

@@ -1,6 +1,7 @@
 
 #include <linux/sched.h>
 #include <linux/sched/sysctl.h>
+#include <linux/sched/topology.h>
 #include <linux/sched/rt.h>
 #include <linux/u64_stats_sync.h>
 #include <linux/sched/deadline.h>