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

We are going to split <linux/sched/numa_balancing.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/numa_balancing.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 <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/fs/exec.c b/fs/exec.c
index aa228b9..e857c72 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -35,6 +35,7 @@
 #include <linux/sched/mm.h>
 #include <linux/sched/coredump.h>
 #include <linux/sched/signal.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/pagemap.h>
 #include <linux/perf_event.h>
 #include <linux/highmem.h>
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 61bea3a..cfe7f93 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -61,6 +61,7 @@
 #include <linux/string.h>
 #include <linux/mman.h>
 #include <linux/sched/mm.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/proc_fs.h>
 #include <linux/ioport.h>
 #include <linux/uaccess.h>
diff --git a/include/linux/sched/numa_balancing.h b/include/linux/sched/numa_balancing.h
new file mode 100644
index 0000000..9991822
--- /dev/null
+++ b/include/linux/sched/numa_balancing.h
@@ -0,0 +1,6 @@
+#ifndef _LINUX_SCHED_NUMA_BALANCING_H
+#define _LINUX_SCHED_NUMA_BALANCING_H
+
+#include <linux/sched.h>
+
+#endif /* _LINUX_SCHED_NUMA_BALANCING_H */
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 9b90c57..9e3ef6c 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -4,7 +4,7 @@
 #if !defined(_TRACE_SCHED_H) || defined(TRACE_HEADER_MULTI_READ)
 #define _TRACE_SCHED_H
 
-#include <linux/sched.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/tracepoint.h>
 #include <linux/binfmts.h>
 
diff --git a/kernel/fork.c b/kernel/fork.c
index a5ad1e4..08d6c09 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -16,6 +16,7 @@
 #include <linux/sched/mm.h>
 #include <linux/sched/coredump.h>
 #include <linux/sched/user.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/init.h>
 #include <linux/unistd.h>
 #include <linux/module.h>
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 7dfeb14..7e8ce03 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -6,6 +6,7 @@
 #include <linux/sched/clock.h>
 #include <linux/sched/wake_q.h>
 #include <linux/sched/signal.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/sched/mm.h>
 #include <linux/sched/cpufreq.h>
 #include <linux/u64_stats_sync.h>
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index dee92fa..d36b2af 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -10,6 +10,7 @@
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <linux/sched/coredump.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/highmem.h>
 #include <linux/hugetlb.h>
 #include <linux/mmu_notifier.h>
diff --git a/mm/memory.c b/mm/memory.c
index 6fc918b..d4994a2 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -42,6 +42,7 @@
 #include <linux/mm.h>
 #include <linux/sched/mm.h>
 #include <linux/sched/coredump.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/hugetlb.h>
 #include <linux/mman.h>
 #include <linux/swap.h>
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 9089241..18e0105 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -74,6 +74,7 @@
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/sched/mm.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/nodemask.h>
 #include <linux/cpuset.h>
 #include <linux/slab.h>