score: Rework thread priority management

Add priority nodes which contribute to the overall thread priority.

The actual priority of a thread is now an aggregation of priority nodes.
The thread priority aggregation for the home scheduler instance of a
thread consists of at least one priority node, which is normally the
real priority of the thread.  The locking protocols (e.g. priority
ceiling and priority inheritance), rate-monotonic period objects and the
POSIX sporadic server add, change and remove priority nodes.

A thread changes its priority now immediately, e.g. priority changes are
not deferred until the thread releases its last resource.

Replace the _Thread_Change_priority() function with

 * _Thread_Priority_perform_actions(),
 * _Thread_Priority_add(),
 * _Thread_Priority_remove(),
 * _Thread_Priority_change(), and
 * _Thread_Priority_update().

Update #2412.
Update #2556.

1 files changed, 1 insertions, 1 deletions

diff --git a/cpukit/score/src/scheduleredfyield.c b/cpukit/score/src/scheduleredfyield.c
index 06c1b46895..3e64e5ca05 100644
--- a/cpukit/score/src/scheduleredfyield.c
+++ b/cpukit/score/src/scheduleredfyield.c
@@ -33,7 +33,7 @@ Scheduler_Void_or_thread _Scheduler_EDF_Yield(
   node = _Scheduler_EDF_Thread_get_node( the_thread );
 
   _Scheduler_EDF_Extract( context, node );
-  _Scheduler_EDF_Enqueue( context, node, node->current_priority );
+  _Scheduler_EDF_Enqueue( context, node, node->priority );
   _Scheduler_EDF_Schedule_body( scheduler, the_thread, true );
 
   SCHEDULER_RETURN_VOID_OR_NULL;