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-rw-r--r--includes/sys/sdt.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/includes/sys/sdt.h b/includes/sys/sdt.h
index 3847c497..d85d8e2e 100644
--- a/includes/sys/sdt.h
+++ b/includes/sys/sdt.h
@@ -40,7 +40,7 @@
#define STAP_PROBE_DATA(probe, guard, arg) \
STAP_PROBE_DATA_(#probe,guard,arg)
-#if defined STAP_HAS_SEMAPHORES && defined EXPERIMENTAL_UTRACE_SDT
+#if defined STAP_HAS_SEMAPHORES && ! defined EXPERIMENTAL_KPROBE_SDT
#define STAP_SEMAPHORE(probe) \
if (__builtin_expect ( probe ## _semaphore , 0))
#else