trace_events_filter: Use rcu_assign_pointer() when setting ftrace_event_call->filter
[linux-2.6.git] / kernel / trace / trace_events_filter.c
index 256764e..bd3c636 100644 (file)
@@ -1766,7 +1766,7 @@ static int replace_system_preds(struct event_subsystem *system,
                 * replace the filter for the call.
                 */
                filter = call->filter;
-               call->filter = filter_item->filter;
+               rcu_assign_pointer(call->filter, filter_item->filter);
                filter_item->filter = filter;
 
                fail = false;
@@ -1821,7 +1821,7 @@ int apply_event_filter(struct ftrace_event_call *call, char *filter_string)
                filter = call->filter;
                if (!filter)
                        goto out_unlock;
-               call->filter = NULL;
+               RCU_INIT_POINTER(call->filter, NULL);
                /* Make sure the filter is not being used */
                synchronize_sched();
                __free_filter(filter);
@@ -1862,7 +1862,7 @@ out:
         * string
         */
        tmp = call->filter;
-       call->filter = filter;
+       rcu_assign_pointer(call->filter, filter);
        if (tmp) {
                /* Make sure the call is done with the filter */
                synchronize_sched();