LITMUS^RT Core: add get_current_budget() system call

Allow userspace to figure out the used-up and remaining budget
of a task.

1 files changed, 4 insertions, 0 deletions

diff --git a/litmus/sched_plugin.c b/litmus/sched_plugin.c
index edd91e9bf773..7b1eba0de75c 100644
--- a/litmus/sched_plugin.c
+++ b/litmus/sched_plugin.c
@@ -13,6 +13,7 @@
 #include <litmus/sched_plugin.h>
 #include <litmus/preempt.h>
 #include <litmus/jobs.h>
+#include <litmus/budget.h>
 
 /*
  * Generic function to trigger preemption on either local or remote cpu
@@ -197,6 +198,9 @@ int register_sched_plugin(struct sched_plugin* plugin)
         if (!plugin->wait_for_release_at)
                 plugin->wait_for_release_at = default_wait_for_release_at;
 
+        if (!plugin->current_budget)
+                plugin->current_budget = litmus_current_budget;
+
         raw_spin_lock(&sched_plugins_lock);
         list_add(&plugin->list, &sched_plugins);
         raw_spin_unlock(&sched_plugins_lock);