score: Optimize _Thread_queue_Enqueue()

Move thread state for _Thread_queue_Enqueue() to the thread queue
context.  This reduces the parameter count of _Thread_queue_Enqueue()
from five to four (ARM for example has only four function parameter
registers).  Since the thread state is used after several function calls
inside _Thread_queue_Enqueue() this parameter was saved on the stack
previously.

1 files changed, 4 insertions, 1 deletions

diff --git a/cpukit/score/src/mutex.c b/cpukit/score/src/mutex.c
index 7c2388df14..edd2e41dfd 100644
--- a/cpukit/score/src/mutex.c
+++ b/cpukit/score/src/mutex.c
@@ -109,6 +109,10 @@ static void _Mutex_Acquire_slow(
   Thread_queue_Context *queue_context
 )
 {
+  _Thread_queue_Context_set_thread_state(
+    queue_context,
+    STATES_WAITING_FOR_SYS_LOCK_MUTEX
+  );
   _Thread_queue_Context_set_do_nothing_enqueue_callout( queue_context );
   _Thread_queue_Context_set_deadlock_callout(
     queue_context,
@@ -119,7 +123,6 @@ static void _Mutex_Acquire_slow(
     &mutex->Queue.Queue,
     MUTEX_TQ_OPERATIONS,
     executing,
-    STATES_WAITING_FOR_SYS_LOCK_MUTEX,
     queue_context
   );
 }