LITMUS^RT core: add should_wait_for_stack() callback

Allow plugins to give up when waiting for a stack to become available.

1 files changed, 6 insertions, 0 deletions

diff --git a/litmus/sched_plugin.c b/litmus/sched_plugin.c
index 6ab5b85082c9..4007e5129e80 100644
--- a/litmus/sched_plugin.c
+++ b/litmus/sched_plugin.c
@@ -70,6 +70,11 @@ static struct task_struct* litmus_dummy_schedule(struct task_struct * prev)
         return NULL;
 }
 
+static bool litmus_dummy_should_wait_for_stack(struct task_struct *next)
+{
+        return true; /* by default, wait indefinitely */
+}
+
 static long litmus_dummy_admit_task(struct task_struct* tsk)
 {
         printk(KERN_CRIT "LITMUS^RT: Linux plugin rejects %s/%d.\n",
@@ -186,6 +191,7 @@ int register_sched_plugin(struct sched_plugin* plugin)
         /* make sure we don't trip over null pointers later */
         CHECK(finish_switch);
         CHECK(schedule);
+        CHECK(should_wait_for_stack);
         CHECK(task_wake_up);
         CHECK(task_exit);
         CHECK(task_cleanup);