- initial commit from private repository

kernel/atomkernel.c

@@ -342,6 +342,9 @@ static void atomThreadSwitch(ATOM_TCB *old_tcb, ATOM_TCB *new_tcb)
         /* Set the new currently-running thread pointer */
         curr_tcb = new_tcb;
 
+        /* TKL: If the thread is being scheduled in, it can not be suspended */
+        curr_tcb->suspended = FALSE;
+
         /* Call the architecture-specific context switch */
         archContextSwitch (old_tcb, new_tcb);
     }
@@ -351,7 +354,13 @@ static void atomThreadSwitch(ATOM_TCB *old_tcb, ATOM_TCB *new_tcb)
      * we get back here, we are running in old_tcb context again. Clear its
      * suspend status now that we're back.
      */
-    old_tcb->suspended = FALSE;
+
+    /**
+     *  TKL: does not work on Cortex-M because of the delayed context switching
+     *  via pend_sv_handler and also the separate thread and exception stacks
+     *  being used.
+     */
+    // old_tcb->suspended = FALSE;
 
 }