ftrace: fix !CONFIG_DYNAMIC_FTRACE ftrace_swapper_pid definition

Impact: build fix
Signed-off-by: NIngo Molnar <mingo@elte.hu>

kernel/trace/ftrace.c

@@ -243,14 +243,16 @@ static void ftrace_update_pid_func(void)
 	mutex_unlock(&ftrace_lock);
 }
 
+/* set when tracing only a pid */
+struct pid *ftrace_pid_trace;
+static struct pid * const ftrace_swapper_pid = &init_struct_pid;
+
 #ifdef CONFIG_DYNAMIC_FTRACE
+
 #ifndef CONFIG_FTRACE_MCOUNT_RECORD
 # error Dynamic ftrace depends on MCOUNT_RECORD
 #endif
 
-/* set when tracing only a pid */
-struct pid *ftrace_pid_trace;
-static struct pid * const ftrace_swapper_pid = &init_struct_pid;
 static struct hlist_head ftrace_func_hash[FTRACE_FUNC_HASHSIZE] __read_mostly;
 
 struct ftrace_func_hook {