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-rw-r--r--cpukit/score/include/rtems/score/thread.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/cpukit/score/include/rtems/score/thread.h b/cpukit/score/include/rtems/score/thread.h
index b0f50f8c76..d60a2b7233 100644
--- a/cpukit/score/include/rtems/score/thread.h
+++ b/cpukit/score/include/rtems/score/thread.h
@@ -40,9 +40,11 @@
#define RTEMS_SCORE_THREAD_ENABLE_EXHAUST_TIMESLICE
#endif
-#if defined(RTEMS_POSIX_API)
- #define RTEMS_SCORE_THREAD_ENABLE_SCHEDULER_CALLOUT
-#endif
+/*
+ * With the addition of the Constant Block Scheduler (CBS),
+ * this feature is needed even when POSIX is disabled.
+ */
+#define RTEMS_SCORE_THREAD_ENABLE_SCHEDULER_CALLOUT
#if defined(RTEMS_POSIX_API)
#define RTEMS_SCORE_THREAD_ENABLE_USER_PROVIDED_STACK_VIA_API