If tracing is disabled on boot up, the kernel should not execute self tests.
In this patch, the kernel checks whether tracing is disabled or not
before executing self tests.
Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae...@hitachi.com>
Cc: Steven Rostedt <rost...@goodmis.org>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu...@hitachi.com>
Cc: linux-kernel@vger.kernel.org
---
kernel/trace/trace_kprobe.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 903ae28..ef2fba1 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1377,6 +1377,9 @@ static __init int kprobe_trace_self_tests_init(void)
struct trace_kprobe *tk;
struct ftrace_event_file *file;
+ if (tracing_is_disabled())
+ return -ENODEV;
+
target = kprobe_trace_selftest_target;
pr_info("Testing kprobe tracing: ");
--
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