[PATCH] c-user: Mention atomic operations API

[Sebastian Huber]

---
 c-user/symmetric_multiprocessing_services.rst | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/c-user/symmetric_multiprocessing_services.rst b/c-user/symmetric_multiprocessing_services.rst
index ab5e1be..e04adb3 100644
--- a/c-user/symmetric_multiprocessing_services.rst
+++ b/c-user/symmetric_multiprocessing_services.rst
@@ -302,6 +302,14 @@ of the OpenMP master thread that created it.  In the scheduler instance
 ``WRK1`` there are three thread pools available and their worker threads run at
 priority four.
 
+Atomic Operations
+-----------------
+
+There is no public RTEMS API for atomic operations.  It is recommended to use
+the standard C `<stdatomic.h> <https://en.cppreference.com/w/c/atomic>`_ or C++
+`<atomic> <https://en.cppreference.com/w/cpp/atomic/atomic>`_ APIs in
+applications.
+
 Application Issues
 ==================
 
-- 
2.16.4