sched/headers: Move the JOBCTL_ defines and methods from <linux/sched.h> to <linux/sched/jobctl.h>

Only a small fraction of sched.h users actually utilizes these defines,
and they are not scheduler functionality in any case, so move them
into their separate header.

(Also make <linux/sched/jobctl.h> a self-contained header.)

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

@@ -1549,36 +1549,6 @@ TASK_PFA_CLEAR(SPREAD_SLAB, spread_slab)
 TASK_PFA_TEST(LMK_WAITING, lmk_waiting)
 TASK_PFA_SET(LMK_WAITING, lmk_waiting)
 
-/*
- * task->jobctl flags
- */
-#define JOBCTL_STOP_SIGMASK	0xffff	/* signr of the last group stop */
-
-#define JOBCTL_STOP_DEQUEUED_BIT 16	/* stop signal dequeued */
-#define JOBCTL_STOP_PENDING_BIT	17	/* task should stop for group stop */
-#define JOBCTL_STOP_CONSUME_BIT	18	/* consume group stop count */
-#define JOBCTL_TRAP_STOP_BIT	19	/* trap for STOP */
-#define JOBCTL_TRAP_NOTIFY_BIT	20	/* trap for NOTIFY */
-#define JOBCTL_TRAPPING_BIT	21	/* switching to TRACED */
-#define JOBCTL_LISTENING_BIT	22	/* ptracer is listening for events */
-
-#define JOBCTL_STOP_DEQUEUED	(1UL << JOBCTL_STOP_DEQUEUED_BIT)
-#define JOBCTL_STOP_PENDING	(1UL << JOBCTL_STOP_PENDING_BIT)
-#define JOBCTL_STOP_CONSUME	(1UL << JOBCTL_STOP_CONSUME_BIT)
-#define JOBCTL_TRAP_STOP	(1UL << JOBCTL_TRAP_STOP_BIT)
-#define JOBCTL_TRAP_NOTIFY	(1UL << JOBCTL_TRAP_NOTIFY_BIT)
-#define JOBCTL_TRAPPING		(1UL << JOBCTL_TRAPPING_BIT)
-#define JOBCTL_LISTENING	(1UL << JOBCTL_LISTENING_BIT)
-
-#define JOBCTL_TRAP_MASK	(JOBCTL_TRAP_STOP | JOBCTL_TRAP_NOTIFY)
-#define JOBCTL_PENDING_MASK	(JOBCTL_STOP_PENDING | JOBCTL_TRAP_MASK)
-
-extern bool task_set_jobctl_pending(struct task_struct *task,
-				    unsigned long mask);
-extern void task_clear_jobctl_trapping(struct task_struct *task);
-extern void task_clear_jobctl_pending(struct task_struct *task,
-				      unsigned long mask);
-
 static inline void rcu_copy_process(struct task_struct *p)
 {
 #ifdef CONFIG_PREEMPT_RCU

include/linux/sched/jobctl.h

@@ -1,4 +1,36 @@
 #ifndef _LINUX_SCHED_JOBCTL_H
 #define _LINUX_SCHED_JOBCTL_H
 
+#include <linux/types.h>
+
+struct task_struct;
+
+/*
+ * task->jobctl flags
+ */
+#define JOBCTL_STOP_SIGMASK	0xffff	/* signr of the last group stop */
+
+#define JOBCTL_STOP_DEQUEUED_BIT 16	/* stop signal dequeued */
+#define JOBCTL_STOP_PENDING_BIT	17	/* task should stop for group stop */
+#define JOBCTL_STOP_CONSUME_BIT	18	/* consume group stop count */
+#define JOBCTL_TRAP_STOP_BIT	19	/* trap for STOP */
+#define JOBCTL_TRAP_NOTIFY_BIT	20	/* trap for NOTIFY */
+#define JOBCTL_TRAPPING_BIT	21	/* switching to TRACED */
+#define JOBCTL_LISTENING_BIT	22	/* ptracer is listening for events */
+
+#define JOBCTL_STOP_DEQUEUED	(1UL << JOBCTL_STOP_DEQUEUED_BIT)
+#define JOBCTL_STOP_PENDING	(1UL << JOBCTL_STOP_PENDING_BIT)
+#define JOBCTL_STOP_CONSUME	(1UL << JOBCTL_STOP_CONSUME_BIT)
+#define JOBCTL_TRAP_STOP	(1UL << JOBCTL_TRAP_STOP_BIT)
+#define JOBCTL_TRAP_NOTIFY	(1UL << JOBCTL_TRAP_NOTIFY_BIT)
+#define JOBCTL_TRAPPING		(1UL << JOBCTL_TRAPPING_BIT)
+#define JOBCTL_LISTENING	(1UL << JOBCTL_LISTENING_BIT)
+
+#define JOBCTL_TRAP_MASK	(JOBCTL_TRAP_STOP | JOBCTL_TRAP_NOTIFY)
+#define JOBCTL_PENDING_MASK	(JOBCTL_STOP_PENDING | JOBCTL_TRAP_MASK)
+
+extern bool task_set_jobctl_pending(struct task_struct *task, unsigned long mask);
+extern void task_clear_jobctl_trapping(struct task_struct *task);
+extern void task_clear_jobctl_pending(struct task_struct *task, unsigned long mask);
+
 #endif /* _LINUX_SCHED_JOBCTL_H */