[PATCH v3 11/12] tracing: guard tracing_selftest_disabled by CONFIG_FTRACE_STARTUP_TEST

[zhangwei(Jovi)]

From: "zhangwei(Jovi)" <jovi.zhangwei@xxxxxxxxxx>

Variable tracing_selftest_disabled have not any sense when
CONFIG_FTRACE_STARTUP_TEST is disabled.

This patch also remove __read_mostly attribute, since variable
tracing_selftest_disabled really not read mostly.

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@xxxxxxxxxx>
---
 kernel/trace/trace.c        |    6 ++++--
 kernel/trace/trace.h        |    2 +-
 kernel/trace/trace_events.c |    2 ++
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index ee4e110..09a3aa8 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -58,10 +58,12 @@ bool ring_buffer_expanded;
  */
 static bool __read_mostly tracing_selftest_running;
 
+#ifdef CONFIG_FTRACE_STARTUP_TEST
 /*
  * If a tracer is running, we do not want to run SELFTEST.
  */
-bool __read_mostly tracing_selftest_disabled;
+bool tracing_selftest_disabled;
+#endif
 
 /* For tracers that don't implement custom flags */
 static struct tracer_opt dummy_tracer_opt[] = {
@@ -1069,8 +1071,8 @@ int register_tracer(struct tracer *type)
 	tracing_set_tracer(type->name);
 	default_bootup_tracer = NULL;
 	/* disable other selftests, since this will break it. */
-	tracing_selftest_disabled = true;
 #ifdef CONFIG_FTRACE_STARTUP_TEST
+	tracing_selftest_disabled = true;
 	printk(KERN_INFO "Disabling FTRACE selftests due to running tracer '%s'\n",
 	       type->name);
 #endif
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 9b8afa7..e9ef8b7 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -546,10 +546,10 @@ extern int DYN_FTRACE_TEST_NAME(void);
 extern int DYN_FTRACE_TEST_NAME2(void);
 
 extern bool ring_buffer_expanded;
-extern bool tracing_selftest_disabled;
 DECLARE_PER_CPU(int, ftrace_cpu_disabled);
 
 #ifdef CONFIG_FTRACE_STARTUP_TEST
+extern bool tracing_selftest_disabled;
 extern int trace_selftest_startup_function(struct tracer *trace,
 					   struct trace_array *tr);
 extern int trace_selftest_startup_function_graph(struct tracer *trace,
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 7c52a51..7c4a16b 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -2251,7 +2251,9 @@ static __init int setup_trace_event(char *str)
 {
 	strlcpy(bootup_event_buf, str, COMMAND_LINE_SIZE);
 	ring_buffer_expanded = true;
+#ifdef CONFIG_FTRACE_STARTUP_TEST
 	tracing_selftest_disabled = true;
+#endif
 
 	return 1;
 }
-- 
1.7.9.7


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