Infrastructure for Litmus signals.prop/litmus-signals

Added signals to Litmus. Specifcally, SIG_BUDGET signals
are delivered (when requested by real-time tasks) when
a budget is exceeded.

Note: pfair not currently supported (but it probably could be).

1 files changed, 10 insertions, 0 deletions

diff --git a/litmus/litmus.c b/litmus/litmus.c
index 81384327e850..3526749852aa 100644
--- a/litmus/litmus.c
+++ b/litmus/litmus.c
@@ -136,6 +136,16 @@ asmlinkage long sys_set_rt_task_param(pid_t pid, struct rt_task __user * param)
                        pid, tp.budget_policy);
                 goto out_unlock;
         }
+        if (tp.budget_signal_policy != NO_SIGNALS &&
+            tp.budget_signal_policy != QUANTUM_SIGNALS &&
+            tp.budget_signal_policy != PRECISE_SIGNALS)
+        {
+                printk(KERN_INFO "litmus: real-time task %d rejected "
+                       "because unsupported budget signalling policy "
+                       "specified (%d)\n",
+                       pid, tp.budget_signal_policy);
+                goto out_unlock;
+        }
 
         target->rt_param.task_params = tp;