Add tracing support.

(KConfig still missing.)

fix sched_trace printk hooks (to be merged)

Fix feather-trace generic impl. (to be merged)

1 files changed, 14 insertions, 0 deletions

diff --git a/include/litmus/feather_trace.h b/include/litmus/feather_trace.h
index 3ac1ee5e0277..eef8af7a414e 100644
--- a/include/litmus/feather_trace.h
+++ b/include/litmus/feather_trace.h
@@ -1,6 +1,7 @@
 #ifndef _FEATHER_TRACE_H_
 #define _FEATHER_TRACE_H_
 
+#include <asm/feather_trace.h>
 
 int ft_enable_event(unsigned long id);
 int ft_disable_event(unsigned long id);
@@ -30,6 +31,19 @@ extern int ft_events[MAX_EVENTS];
 
 #define ft_event3(id, callback, p, p2, p3) \
         if (ft_events[id]) callback(id, p, p2, p3);
+
+#include <asm/atomic.h>
+
+static inline int fetch_and_inc(int *val)
+{
+        return atomic_add_return(1, (atomic_t*) val) - 1;
+}
+
+static inline int fetch_and_dec(int *val)
+{
+        return atomic_sub_return(1, (atomic_t*) val) + 1;
+}
+
 #endif