From 748ec3a20eb44fce19af3cef04f8db8a8e7aead3 Mon Sep 17 00:00:00 2001 From: Yoshihiro YUNOMAE Date: Fri, 6 Jun 2014 07:35:20 +0900 Subject: [PATCH] tracing/kprobes: Avoid self tests if tracing is disabled on boot up If tracing is disabled on boot up, the kernel should not execute tracing self tests. The kernel should check whether tracing is disabled or not before executing any of the tracing self tests. Link: http://lkml.kernel.org/p/20140605223520.32311.56097.stgit@yunodevel Acked-by: Masami Hiramatsu Signed-off-by: Yoshihiro YUNOMAE Signed-off-by: Steven Rostedt --- 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 903ae28962be..ef2fba1f46b5 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: "); -- 2.11.0