From: Tal Shorer Date: Sat, 1 Aug 2015 12:27:57 +0000 (+0300) Subject: tracing: Allow disabling compilation of specific trace systems X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c63b7682b6d90530d3a071ff75b81bfddcce8598;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git tracing: Allow disabling compilation of specific trace systems Allow a trace events header file to disable compilation of its trace events by defining the preprocessor macro NOTRACE. This could be done, for example, according to a Kconfig option. Link: http://lkml.kernel.org/r/1438432079-11704-3-git-send-email-tal.shorer@gmail.com Signed-off-by: Tal Shorer Signed-off-by: Steven Rostedt --- diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index a5f7f3ecafa3..afada369c5b7 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -111,7 +111,18 @@ extern void syscall_unregfunc(void); #define TP_ARGS(args...) args #define TP_CONDITION(args...) args -#ifdef CONFIG_TRACEPOINTS +/* + * Individual subsystem my have a separate configuration to + * enable their tracepoints. By default, this file will create + * the tracepoints if CONFIG_TRACEPOINT is defined. If a subsystem + * wants to be able to disable its tracepoints from being created + * it can define NOTRACE before including the tracepoint headers. + */ +#if defined(CONFIG_TRACEPOINTS) && !defined(NOTRACE) +#define TRACEPOINTS_ENABLED +#endif + +#ifdef TRACEPOINTS_ENABLED /* * it_func[0] is never NULL because there is at least one element in the array @@ -234,7 +245,7 @@ extern void syscall_unregfunc(void); #define EXPORT_TRACEPOINT_SYMBOL(name) \ EXPORT_SYMBOL(__tracepoint_##name) -#else /* !CONFIG_TRACEPOINTS */ +#else /* !TRACEPOINTS_ENABLED */ #define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \ static inline void trace_##name(proto) \ { } \ @@ -266,7 +277,7 @@ extern void syscall_unregfunc(void); #define EXPORT_TRACEPOINT_SYMBOL_GPL(name) #define EXPORT_TRACEPOINT_SYMBOL(name) -#endif /* CONFIG_TRACEPOINTS */ +#endif /* TRACEPOINTS_ENABLED */ #ifdef CONFIG_TRACING /** diff --git a/include/trace/define_trace.h b/include/trace/define_trace.h index 09b3880105a9..2d8639ea64d5 100644 --- a/include/trace/define_trace.h +++ b/include/trace/define_trace.h @@ -86,7 +86,7 @@ #undef DECLARE_TRACE #define DECLARE_TRACE(name, proto, args) -#ifdef CONFIG_EVENT_TRACING +#ifdef TRACEPOINTS_ENABLED #include #include #endif