1 files changed, 4 insertions, 0 deletions
diff --git a/cpukit/score/include/rtems/score/schedulersmp.h b/cpukit/score/include/rtems/score/schedulersmp.h
index a58417a268..9e11488584 100644
--- a/cpukit/score/include/rtems/score/schedulersmp.h
+++ b/cpukit/score/include/rtems/score/schedulersmp.h
@@ -54,6 +54,10 @@ typedef struct {
 
   /**
    * @brief Chain of the available idle threads.
+   *
+   * Idle threads are used for the scheduler helping protocol.  It is crucial
+   * that the idle threads preserve their relative order.  This is the case for
+   * this priority based scheduler.
    */
   Chain_Control Idle_threads;
 } Scheduler_SMP_Context;