cgroup/cpuset: Move cpu.h include to cpuset-internal.h

The newly created cpuset-v1.c file uses cpus_read_lock/unlock() functions
which are defined in cpu.h but not included in cpuset-internal.h yet
leading to compilation error under certain kernel configurations.  Fix it
by moving the cpu.h include from cpuset.c to cpuset-internal.h. While
at it, sort the include files in alphabetic order.

Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Fixes: 047b830 ("cgroup/cpuset: move relax_domain_level to cpuset-v1.c")
Signed-off-by: Waiman Long <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

Author: Waiman-Long

kernel/cgroup/cpuset-internal.h

@@ -3,11 +3,12 @@
 #ifndef __CPUSET_INTERNAL_H
 #define __CPUSET_INTERNAL_H
 
-#include <linux/union_find.h>
+#include <linux/cgroup.h>
+#include <linux/cpu.h>
 #include <linux/cpumask.h>
-#include <linux/spinlock.h>
 #include <linux/cpuset.h>
-#include <linux/cgroup.h>
+#include <linux/spinlock.h>
+#include <linux/union_find.h>
 
 /* See "Frequency meter" comments, below. */
 

kernel/cgroup/cpuset.c

@@ -24,7 +24,6 @@
 #include "cgroup-internal.h"
 #include "cpuset-internal.h"
 
-#include <linux/cpu.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>