1 files changed, 16 insertions, 6 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index b44b9a43b0fc..a2be2d055299 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4456,9 +4456,9 @@ asmlinkage long sys_sched_yield(void)
         return 0;
 }
 
-static inline int __resched_legal(void)
+static inline int __resched_legal(int expected_preempt_count)
 {
-        if (unlikely(preempt_count()))
+        if (unlikely(preempt_count() != expected_preempt_count))
                 return 0;
         if (unlikely(system_state != SYSTEM_RUNNING))
                 return 0;
@@ -4484,7 +4484,7 @@ static void __cond_resched(void)
 
 int __sched cond_resched(void)
 {
-        if (need_resched() && __resched_legal()) {
+        if (need_resched() && __resched_legal(0)) {
                 __cond_resched();
                 return 1;
         }
@@ -4510,7 +4510,7 @@ int cond_resched_lock(spinlock_t *lock)
                 ret = 1;
                 spin_lock(lock);
         }
-        if (need_resched() && __resched_legal()) {
+        if (need_resched() && __resched_legal(1)) {
                 spin_release(&lock->dep_map, 1, _THIS_IP_);
                 _raw_spin_unlock(lock);
                 preempt_enable_no_resched();
@@ -4526,7 +4526,7 @@ int __sched cond_resched_softirq(void)
 {
         BUG_ON(!in_softirq());
 
-        if (need_resched() && __resched_legal()) {
+        if (need_resched() && __resched_legal(0)) {
                 raw_local_irq_disable();
                 _local_bh_enable();
                 raw_local_irq_enable();
@@ -6494,7 +6494,12 @@ static int build_sched_domains(const cpumask_t *cpu_map)
         for (i = 0; i < MAX_NUMNODES; i++)
                 init_numa_sched_groups_power(sched_group_nodes[i]);
 
-        init_numa_sched_groups_power(sched_group_allnodes);
+        if (sched_group_allnodes) {
+                int group = cpu_to_allnodes_group(first_cpu(*cpu_map));
+                struct sched_group *sg = &sched_group_allnodes[group];
+
+                init_numa_sched_groups_power(sg);
+        }
 #endif
 
         /* Attach the domains */
@@ -6761,6 +6766,11 @@ void __init sched_init(void)
         }
 
         set_load_weight(&init_task);
+
+#ifdef CONFIG_RT_MUTEXES
+        plist_head_init(&init_task.pi_waiters, &init_task.pi_lock);
+#endif
+
         /*
          * The boot idle thread does lazy MMU switching as well:
          */