Messages in this thread Patch in this message | | | From | Nicolas Pitre <> | Subject | [PATCH v2 1/5] tracing: Do not do anything special with tracepoint_string when tracing is disabled | Date | Fri, 25 Jul 2014 16:05:29 -0400 |
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From: Steven Rostedt <rostedt@goodmis.org>
When CONFIG_TRACING is not enabled, there's no reason to save the trace strings either by the linker or as a static variable that can be referenced later. Simply pass back the string that is given to tracepoint_string().
Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Nicolas Pitre <nico@linaro.org> --- include/linux/ftrace_event.h | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h index cff3106ffe..b29636327d 100644 --- a/include/linux/ftrace_event.h +++ b/include/linux/ftrace_event.h @@ -574,6 +574,7 @@ do { \ __trace_printk(ip, fmt, ##args); \ } while (0) +#ifdef CONFIG_TRACING /** * tracepoint_string - register constant persistent string to trace system * @str - a constant persistent string that will be referenced in tracepoints @@ -607,6 +608,15 @@ do { \ ___tp_str; \ }) #define __tracepoint_string __attribute__((section("__tracepoint_str"))) +#else +/* + * tracepoint_string() is used to save the string address for userspace + * tracing tools. When tracing isn't configured, there's no need to save + * anything. + */ +# define tracepoint_string(str) str +# define __tracepoint_string +#endif #ifdef CONFIG_PERF_EVENTS struct perf_event; -- 1.8.4.108.g55ea5f6
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