sched: NULL pointer dereference while setting sched_rt_period_us

[linux-2.6] / kernel / sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index eaf6751e7612cbc5167865c8c1e4e929ff32ca5a..320e9a43d4cc0b34dbb846a110835c2d542c457d 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1127,6 +1127,7 @@ static enum hrtimer_restart hrtick(struct hrtimer *timer)
        return HRTIMER_NORESTART;
 }
 
+#ifdef CONFIG_SMP
 static void hotplug_hrtick_disable(int cpu)
 {
        struct rq *rq = cpu_rq(cpu);
@@ -1182,6 +1183,7 @@ static void init_hrtick(void)
 {
        hotcpu_notifier(hotplug_hrtick, 0);
 }
+#endif /* CONFIG_SMP */
 
 static void init_rq_hrtick(struct rq *rq)
 {
@@ -8348,7 +8350,7 @@ static unsigned long to_ratio(u64 period, u64 runtime)
 #ifdef CONFIG_CGROUP_SCHED
 static int __rt_schedulable(struct task_group *tg, u64 period, u64 runtime)
 {
-       struct task_group *tgi, *parent = tg->parent;
+       struct task_group *tgi, *parent = tg ? tg->parent : NULL;
        unsigned long total = 0;
 
        if (!parent) {