sched/core: Move the get_preempt_disable_ip() inline to sched/core.c

It's defined in <linux/sched.h>, but nothing outside the scheduler
uses it - so move it to the sched/core.c usage site.
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

@@ -3419,15 +3419,6 @@ static inline void cond_resched_rcu(void)
 #endif
 }
 
-static inline unsigned long get_preempt_disable_ip(struct task_struct *p)
-{
-#ifdef CONFIG_DEBUG_PREEMPT
-	return p->preempt_disable_ip;
-#else
-	return 0;
-#endif
-}
-
 /*
  * Does a critical section need to be broken due to another
  * task waiting?: (technically does not depend on CONFIG_PREEMPT,

kernel/sched/core.c

@@ -3211,6 +3211,15 @@ static inline void preempt_latency_start(int val) { }
 static inline void preempt_latency_stop(int val) { }
 #endif
 
+static inline unsigned long get_preempt_disable_ip(struct task_struct *p)
+{
+#ifdef CONFIG_DEBUG_PREEMPT
+	return p->preempt_disable_ip;
+#else
+	return 0;
+#endif
+}
+
 /*
  * Print scheduling while atomic bug:
  */