hrtimer: splitout peek ahead functionality

Impact: cleanup Provide a peek ahead function that assumes irqs disabled, allows for micro optimizations. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>

hrtimer: splitout peek ahead functionality
Impact: cleanup Provide a peek ahead function that assumes irqs disabled, allows for micro optimizations. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Thomas Gleixner · Ingo Molnar
1 parent fe0bdec68b
Showing 1 changed file with 17 additions and 7 deletions Side-by-side Diff
kernel/hrtimer.c
@@ -1243,6 +1243,22 @@
 	}
 }
  
+/*
+ * local version of hrtimer_peek_ahead_timers() called with interrupts
+ * disabled.
+ */
+static void __hrtimer_peek_ahead_timers(void)
+{
+	struct tick_device *td;
+
+	if (!hrtimer_hres_active())
+		return;
+
+	td = &__get_cpu_var(tick_cpu_device);
+	if (td && td->evtdev)
+		hrtimer_interrupt(td->evtdev);
+}
+
 /**
  * hrtimer_peek_ahead_timers -- run soft-expired timers now
  *
  
  
@@ -1254,16 +1270,10 @@
  */
 void hrtimer_peek_ahead_timers(void)
 {
-	struct tick_device *td;
 	unsigned long flags;
  
-	if (!hrtimer_hres_active())
-		return;
-
 	local_irq_save(flags);
-	td = &__get_cpu_var(tick_cpu_device);
-	if (td && td->evtdev)
-		hrtimer_interrupt(td->evtdev);
+	__hrtimer_peek_ahead_timers();
 	local_irq_restore(flags);
 }
...	...	@@ -1243,6 +1243,22 @@
1243	1243	}
1244	1244	}
1245	1245
	1246	+/*
	1247	+ * local version of hrtimer_peek_ahead_timers() called with interrupts
	1248	+ * disabled.
	1249	+ */
	1250	+static void __hrtimer_peek_ahead_timers(void)
	1251	+{
	1252	+ struct tick_device *td;
	1253	+
	1254	+ if (!hrtimer_hres_active())
	1255	+ return;
	1256	+
	1257	+ td = &__get_cpu_var(tick_cpu_device);
	1258	+ if (td && td->evtdev)
	1259	+ hrtimer_interrupt(td->evtdev);
	1260	+}
	1261	+
1246	1262	/**
1247	1263	* hrtimer_peek_ahead_timers -- run soft-expired timers now
1248	1264	*
1249	1265
1250	1266
...	...	@@ -1254,16 +1270,10 @@
1254	1270	*/
1255	1271	void hrtimer_peek_ahead_timers(void)
1256	1272	{
1257		- struct tick_device *td;
1258	1273	unsigned long flags;
1259	1274
1260		- if (!hrtimer_hres_active())
1261		- return;
1262		-
1263	1275	local_irq_save(flags);
1264		- td = &__get_cpu_var(tick_cpu_device);
1265		- if (td && td->evtdev)
1266		- hrtimer_interrupt(td->evtdev);
	1276	+ __hrtimer_peek_ahead_timers();
1267	1277	local_irq_restore(flags);
1268	1278	}
1269	1279