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-rw-r--r--cpukit/include/rtems/rtems/ratemondata.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/cpukit/include/rtems/rtems/ratemondata.h b/cpukit/include/rtems/rtems/ratemondata.h
index f35fa7eb61..700285c7b4 100644
--- a/cpukit/include/rtems/rtems/ratemondata.h
+++ b/cpukit/include/rtems/rtems/ratemondata.h
@@ -71,10 +71,12 @@ typedef struct {
/** This field is the object management portion of a Period instance. */
Objects_Control Object;
+#if defined(RTEMS_SMP)
/**
* @brief Protects the rate monotonic period state.
*/
- ISR_LOCK_MEMBER( Lock )
+ ISR_lock_Control Lock;
+#endif
/** This is the timer used to provide the unblocking mechanism. */
Watchdog_Control Timer;