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-rw-r--r--cpukit/include/rtems/score/percpu.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/cpukit/include/rtems/score/percpu.h b/cpukit/include/rtems/score/percpu.h
index 7c95a9649a..31bc2b0bff 100644
--- a/cpukit/include/rtems/score/percpu.h
+++ b/cpukit/include/rtems/score/percpu.h
@@ -529,6 +529,13 @@ typedef struct Per_CPU_Control {
} Scheduler;
/**
+ * @brief The ancestor of the executing thread.
+ *
+ * This member is used by _User_extensions_Thread_switch().
+ */
+ struct _Thread_Control *ancestor;
+
+ /**
* @brief Begin of the per-CPU data area.
*
* Contains items defined via PER_CPU_DATA_ITEM().