1 files changed, 23 insertions, 0 deletions

diff --git a/include/litmus/trace_irq.h b/include/litmus/trace_irq.h
new file mode 100644
index 00000000000..b717b1d5539
--- /dev/null
+++ b/include/litmus/trace_irq.h
@@ -0,0 +1,23 @@
+#ifndef _LITMUS_TRACE_IRQ_H_
+#define _LITMUS_TRACE_IRQ_H_
+
+#ifdef CONFIG_SCHED_OVERHEAD_TRACE
+
+#include <linux/percpu.h>
+
+extern DEFINE_PER_CPU(atomic_t, irq_fired_count);
+
+static inline void ft_irq_fired(void)
+{
+        /* Only called with preemptions disabled.  */
+        atomic_inc(&__get_cpu_var(irq_fired_count));
+}
+
+
+#else
+
+#define ft_irq_fired() /* nothing to do */
+
+#endif
+
+#endif