hrtimer: remove duplicate helper function

The helper function hrtimer_callback_running() is used in
kernel/hrtimer.c as well as in the updated net/can/bcm.c which now
supports hrtimers. Moving the helper function to hrtimer.h removes the
duplicate definition in the C-files.
Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

include/linux/hrtimer.h

@@ -316,6 +316,15 @@ static inline int hrtimer_is_queued(struct hrtimer *timer)
 		(HRTIMER_STATE_ENQUEUED | HRTIMER_STATE_PENDING);
 }
 
+/*
+ * Helper function to check, whether the timer is running the callback
+ * function
+ */
+static inline int hrtimer_callback_running(struct hrtimer *timer)
+{
+	return timer->state & HRTIMER_STATE_CALLBACK;
+}
+
 /* Forward a hrtimer so it expires after now: */
 extern u64
 hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval);

kernel/hrtimer.c

@@ -153,15 +153,6 @@ static void hrtimer_get_softirq_time(struct hrtimer_cpu_base *base)
 		ktime_add(xtim, tomono);
 }
 
-/*
- * Helper function to check, whether the timer is running the callback
- * function
- */
-static inline int hrtimer_callback_running(struct hrtimer *timer)
-{
-	return timer->state & HRTIMER_STATE_CALLBACK;
-}
-
 /*
  * Functions and macros which are different for UP/SMP systems are kept in a
  * single place

net/can/bcm.c

@@ -412,12 +412,6 @@ static void bcm_rx_changed(struct bcm_op *op, struct can_frame *data)
 	bcm_send_to_user(op, &head, data, 1);
 }
 
-/* TODO: move to linux/hrtimer.h */
-static inline int hrtimer_callback_running(struct hrtimer *timer)
-{
-        return timer->state & HRTIMER_STATE_CALLBACK;
-}
-
 /*
  * bcm_rx_update_and_send - process a detected relevant receive content change
  *                          1. update the last received data