sched/headers: Move exit_files() and exit_itimers() from <linux/sched.h> to <linux/sched/task.h>

These two functions are task management related, not core scheduler APIs.
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>

include/linux/sched.h

@@ -1386,10 +1386,6 @@ extern void wake_up_new_task(struct task_struct *tsk);
  static inline void kick_process(struct task_struct *tsk) { }
 #endif
 
-extern void exit_files(struct task_struct *);
-
-extern void exit_itimers(struct signal_struct *);
-
 extern void __set_task_comm(struct task_struct *tsk, const char *from, bool exec);
 static inline void set_task_comm(struct task_struct *tsk, const char *from)
 {

include/linux/sched/task.h

@@ -67,6 +67,9 @@ static inline void exit_thread(struct task_struct *tsk)
 #endif
 extern void do_group_exit(int);
 
+extern void exit_files(struct task_struct *);
+extern void exit_itimers(struct signal_struct *);
+
 extern long _do_fork(unsigned long, unsigned long, unsigned long, int __user *, int __user *, unsigned long);
 extern long do_fork(unsigned long, unsigned long, unsigned long, int __user *, int __user *);
 struct task_struct *fork_idle(int);