tracepoints: use rcu sched

Make tracepoints use rcu sched. (cleanup)

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 6 insertions, 9 deletions

diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index c7c62a4a75f5..db39961a0d03 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -80,10 +80,7 @@ static void tracepoint_entry_free_old(struct tracepoint_entry *entry, void *old)
         entry->rcu_pending = 1;
         /* write rcu_pending before calling the RCU callback */
         smp_wmb();
-#ifdef CONFIG_PREEMPT_RCU
-        synchronize_sched();    /* Until we have the call_rcu_sched() */
-#endif
-        call_rcu(&entry->rcu, free_old_closure);
+        call_rcu_sched(&entry->rcu, free_old_closure);
 }
 
 static void debug_print_probes(struct tracepoint_entry *entry)
@@ -245,9 +242,9 @@ static int remove_tracepoint(const char *name)
         if (e->refcount)
                 return -EBUSY;
         hlist_del(&e->hlist);
-        /* Make sure the call_rcu has been executed */
+        /* Make sure the call_rcu_sched has been executed */
         if (e->rcu_pending)
-                rcu_barrier();
+                rcu_barrier_sched();
         kfree(e);
         return 0;
 }
@@ -344,11 +341,11 @@ int tracepoint_probe_register(const char *name, void *probe)
                 }
         }
         /*
-         * If we detect that a call_rcu is pending for this tracepoint,
+         * If we detect that a call_rcu_sched is pending for this tracepoint,
          * make sure it's executed now.
          */
         if (entry->rcu_pending)
-                rcu_barrier();
+                rcu_barrier_sched();
         old = tracepoint_entry_add_probe(entry, probe);
         if (IS_ERR(old)) {
                 ret = PTR_ERR(old);
@@ -387,7 +384,7 @@ int tracepoint_probe_unregister(const char *name, void *probe)
         if (!entry)
                 goto end;
         if (entry->rcu_pending)
-                rcu_barrier();
+                rcu_barrier_sched();
         old = tracepoint_entry_remove_probe(entry, probe);
         mutex_unlock(&tracepoints_mutex);
         tracepoint_update_probes();             /* may update entry */