From fbd02670f0fef4b1b47585d670a56af33a267399 Mon Sep 17 00:00:00 2001
From: Namhoon Kim <namhoonk@cs.unc.edu>
Date: Tue, 19 Apr 2016 14:25:35 -0400
Subject: Add admission check

---
 litmus/Kconfig  | 1 +
 litmus/litmus.c | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/litmus/Kconfig b/litmus/Kconfig
index 81daf35d9432..6e0f77c3bb8f 100644
--- a/litmus/Kconfig
+++ b/litmus/Kconfig
@@ -375,6 +375,7 @@ endmenu
 config PGMRT_SUPPORT
     bool "Support for PGM^RT API"
     default y
+    depends on LITMUS_LOCKING && ALLOW_EARLY_RELEASE
     help
       This option enables support for PGM^RT API. The source code of PGM^RT
       can be found https://github.com/GElliott/pgm . This option adds some
diff --git a/litmus/litmus.c b/litmus/litmus.c
index 702999191203..0f122e1e7ec1 100644
--- a/litmus/litmus.c
+++ b/litmus/litmus.c
@@ -168,6 +168,14 @@ asmlinkage long sys_set_rt_task_param(pid_t pid, struct rt_task __user * param)
 		       pid, tp.budget_policy);
 		goto out_unlock;
 	}
+#ifdef CONFIG_PGMRT_SUPPORT
+	if (tp.pgm_type < PGM_NOT_A_NODE || tp.pgm_type > PGM_INTERNAL) {
+		printk(KERN_INFO "litmus: real-time task %d rejected "
+				"because of unknown PGM node type specified (%d)\n",
+				pid, tp.pgm_type);
+		goto out_unlock;
+	}
+#endif
 
 	target->rt_param.task_params = tp;
 
-- 
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