x86/hpet: Shuffle code around for readability sake

It doesn't make sense to have init functions in the middle of other
code. Aside of that, further changes in that area create horrible diffs if
the code stays where it is.

No functional change
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Ravi Shankar <ravi.v.shankar@intel.com>
Link: https://lkml.kernel.org/r/20190623132434.951733064@linutronix.de

arch/x86/kernel/hpet.c

@@ -559,6 +559,47 @@ static void init_one_hpet_msi_clockevent(struct hpet_dev *hdev, int cpu)
 					0x7FFFFFFF);
 }
 
+static struct hpet_dev *hpet_get_unused_timer(void)
+{
+	int i;
+
+	if (!hpet_devs)
+		return NULL;
+
+	for (i = 0; i < hpet_num_timers; i++) {
+		struct hpet_dev *hdev = &hpet_devs[i];
+
+		if (!(hdev->flags & HPET_DEV_VALID))
+			continue;
+		if (test_and_set_bit(HPET_DEV_USED_BIT,
+			(unsigned long *)&hdev->flags))
+			continue;
+		return hdev;
+	}
+	return NULL;
+}
+
+static int hpet_cpuhp_online(unsigned int cpu)
+{
+	struct hpet_dev *hdev = hpet_get_unused_timer();
+
+	if (hdev)
+		init_one_hpet_msi_clockevent(hdev, cpu);
+	return 0;
+}
+
+static int hpet_cpuhp_dead(unsigned int cpu)
+{
+	struct hpet_dev *hdev = per_cpu(cpu_hpet_dev, cpu);
+
+	if (!hdev)
+		return 0;
+	free_irq(hdev->irq, hdev);
+	hdev->flags &= ~HPET_DEV_USED;
+	per_cpu(cpu_hpet_dev, cpu) = NULL;
+	return 0;
+}
+
 #ifdef CONFIG_HPET
 /* Reserve at least one timer for userspace (/dev/hpet) */
 #define RESERVE_TIMERS 1
@@ -644,46 +685,6 @@ static void __init hpet_reserve_msi_timers(struct hpet_data *hd)
 }
 #endif
 
-static struct hpet_dev *hpet_get_unused_timer(void)
-{
-	int i;
-
-	if (!hpet_devs)
-		return NULL;
-
-	for (i = 0; i < hpet_num_timers; i++) {
-		struct hpet_dev *hdev = &hpet_devs[i];
-
-		if (!(hdev->flags & HPET_DEV_VALID))
-			continue;
-		if (test_and_set_bit(HPET_DEV_USED_BIT,
-			(unsigned long *)&hdev->flags))
-			continue;
-		return hdev;
-	}
-	return NULL;
-}
-
-static int hpet_cpuhp_online(unsigned int cpu)
-{
-	struct hpet_dev *hdev = hpet_get_unused_timer();
-
-	if (hdev)
-		init_one_hpet_msi_clockevent(hdev, cpu);
-	return 0;
-}
-
-static int hpet_cpuhp_dead(unsigned int cpu)
-{
-	struct hpet_dev *hdev = per_cpu(cpu_hpet_dev, cpu);
-
-	if (!hdev)
-		return 0;
-	free_irq(hdev->irq, hdev);
-	hdev->flags &= ~HPET_DEV_USED;
-	per_cpu(cpu_hpet_dev, cpu) = NULL;
-	return 0;
-}
 #else
 
 static inline void hpet_msi_capability_lookup(unsigned int start_timer) { }