1 files changed, 12 insertions, 15 deletions

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index dd7fd96c90c5..00c518fa34bb 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -62,8 +62,9 @@
 
 static struct lock_class_key rcu_node_class[RCU_NUM_LVLS];
 
-#define RCU_STATE_INITIALIZER(sname) { \
+#define RCU_STATE_INITIALIZER(sname, cr) { \
         .level = { &sname##_state.node[0] }, \
+        .call = cr, \
         .fqs_state = RCU_GP_IDLE, \
         .gpnum = -300, \
         .completed = -300, \
@@ -76,10 +77,11 @@ static struct lock_class_key rcu_node_class[RCU_NUM_LVLS];
         .name = #sname, \
 }
 
-struct rcu_state rcu_sched_state = RCU_STATE_INITIALIZER(rcu_sched);
+struct rcu_state rcu_sched_state =
+        RCU_STATE_INITIALIZER(rcu_sched, call_rcu_sched);
 DEFINE_PER_CPU(struct rcu_data, rcu_sched_data);
 
-struct rcu_state rcu_bh_state = RCU_STATE_INITIALIZER(rcu_bh);
+struct rcu_state rcu_bh_state = RCU_STATE_INITIALIZER(rcu_bh, call_rcu_bh);
 DEFINE_PER_CPU(struct rcu_data, rcu_bh_data);
 
 static struct rcu_state *rcu_state;
@@ -2282,21 +2284,17 @@ static void rcu_barrier_func(void *type)
 {
         int cpu = smp_processor_id();
         struct rcu_head *head = &per_cpu(rcu_barrier_head, cpu);
-        void (*call_rcu_func)(struct rcu_head *head,
-                              void (*func)(struct rcu_head *head));
+        struct rcu_state *rsp = type;
 
         atomic_inc(&rcu_barrier_cpu_count);
-        call_rcu_func = type;
-        call_rcu_func(head, rcu_barrier_callback);
+        rsp->call(head, rcu_barrier_callback);
 }
 
 /*
  * Orchestrate the specified type of RCU barrier, waiting for all
  * RCU callbacks of the specified type to complete.
  */
-static void _rcu_barrier(struct rcu_state *rsp,
-                         void (*call_rcu_func)(struct rcu_head *head,
-                                               void (*func)(struct rcu_head *head)))
+static void _rcu_barrier(struct rcu_state *rsp)
 {
         int cpu;
         unsigned long flags;
@@ -2348,8 +2346,7 @@ static void _rcu_barrier(struct rcu_state *rsp,
                         while (cpu_is_offline(cpu) && ACCESS_ONCE(rdp->qlen))
                                 schedule_timeout_interruptible(1);
                 } else if (ACCESS_ONCE(rdp->qlen)) {
-                        smp_call_function_single(cpu, rcu_barrier_func,
-                                                 (void *)call_rcu_func, 1);
+                        smp_call_function_single(cpu, rcu_barrier_func, rsp, 1);
                         preempt_enable();
                 } else {
                         preempt_enable();
@@ -2370,7 +2367,7 @@ static void _rcu_barrier(struct rcu_state *rsp,
         raw_spin_unlock_irqrestore(&rsp->onofflock, flags);
         atomic_inc(&rcu_barrier_cpu_count);
         smp_mb__after_atomic_inc(); /* Ensure atomic_inc() before callback. */
-        call_rcu_func(&rh, rcu_barrier_callback);
+        rsp->call(&rh, rcu_barrier_callback);
 
         /*
          * Now that we have an rcu_barrier_callback() callback on each
@@ -2393,7 +2390,7 @@ static void _rcu_barrier(struct rcu_state *rsp,
  */
 void rcu_barrier_bh(void)
 {
-        _rcu_barrier(&rcu_bh_state, call_rcu_bh);
+        _rcu_barrier(&rcu_bh_state);
 }
 EXPORT_SYMBOL_GPL(rcu_barrier_bh);
 
@@ -2402,7 +2399,7 @@ EXPORT_SYMBOL_GPL(rcu_barrier_bh);
  */
 void rcu_barrier_sched(void)
 {
-        _rcu_barrier(&rcu_sched_state, call_rcu_sched);
+        _rcu_barrier(&rcu_sched_state);
 }
 EXPORT_SYMBOL_GPL(rcu_barrier_sched);