1 files changed, 6 insertions, 9 deletions

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index e9a4ae94647f..6c99553e9f15 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -107,27 +107,23 @@ static void __cpuinit rcu_init_percpu_data(int cpu, struct rcu_state *rsp,
  */
 void rcu_sched_qs(int cpu)
 {
-        unsigned long flags;
         struct rcu_data *rdp;
 
-        local_irq_save(flags);
         rdp = &per_cpu(rcu_sched_data, cpu);
-        rdp->passed_quiesc = 1;
         rdp->passed_quiesc_completed = rdp->completed;
-        rcu_preempt_qs(cpu);
-        local_irq_restore(flags);
+        barrier();
+        rdp->passed_quiesc = 1;
+        rcu_preempt_note_context_switch(cpu);
 }
 
 void rcu_bh_qs(int cpu)
 {
-        unsigned long flags;
         struct rcu_data *rdp;
 
-        local_irq_save(flags);
         rdp = &per_cpu(rcu_bh_data, cpu);
-        rdp->passed_quiesc = 1;
         rdp->passed_quiesc_completed = rdp->completed;
-        local_irq_restore(flags);
+        barrier();
+        rdp->passed_quiesc = 1;
 }
 
 #ifdef CONFIG_NO_HZ
@@ -615,6 +611,7 @@ rcu_start_gp(struct rcu_state *rsp, unsigned long flags)
 
         /* Advance to a new grace period and initialize state. */
         rsp->gpnum++;
+        WARN_ON_ONCE(rsp->signaled == RCU_GP_INIT);
         rsp->signaled = RCU_GP_INIT; /* Hold off force_quiescent_state. */
         rsp->jiffies_force_qs = jiffies + RCU_JIFFIES_TILL_FORCE_QS;
         record_gp_stall_check_time(rsp);