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authorYoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>2014-06-06 07:35:20 +0900
committerSteven Rostedt <rostedt@goodmis.org>2014-06-06 04:53:39 -0400
commit748ec3a20eb44fce19af3cef04f8db8a8e7aead3 (patch)
tree42c864429c252b68d5ffd2e9af7be05a63e1521c /kernel
parentdc81e5e3abb9f98a3cb6f269c0bee595b2c1235d (diff)
downloadlinux-748ec3a20eb44fce19af3cef04f8db8a8e7aead3.tar.bz2
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 <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace_kprobe.c3
1 files changed, 3 insertions, 0 deletions
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: ");