[ported from 2008.3] Core LITMUS^RT infrastructure

Port 2008.3 Core LITMUS^RT infrastructure to Linux 2.6.32

litmus_sched_class implements 4 new methods:

- prio_changed:
  void

- switched_to:
  void

- get_rr_interval:
  return infinity (i.e., 0)

- select_task_rq:
  return current cpu

1 files changed, 7 insertions, 0 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 166b8c49257c..889730cce3ad 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -74,6 +74,9 @@
 
 #include <trace/events/sched.h>
 
+#include <litmus/litmus.h>
+#include <litmus/sched_plugin.h>
+
 /*
  * Protected counters by write_lock_irq(&tasklist_lock)
  */
@@ -162,6 +165,7 @@ void __put_task_struct(struct task_struct *tsk)
         WARN_ON(atomic_read(&tsk->usage));
         WARN_ON(tsk == current);
 
+        exit_litmus(tsk);
         exit_creds(tsk);
         delayacct_tsk_free(tsk);
 
@@ -244,6 +248,9 @@ static struct task_struct *dup_task_struct(struct task_struct *orig)
 
         tsk->stack = ti;
 
+        /* Don't let the new task be a real-time task. */
+        memset(&tsk->rt_param, 0, sizeof(struct rt_task));
+
         err = prop_local_init_single(&tsk->dirties);
         if (err)
                 goto out;