diff options
| author |   Tal Shorer <tal.shorer@gmail.com> | 2015-08-01 15:27:57 +0300 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2015-10-20 21:55:44 -0400 |
| commit | c63b7682b6d90530d3a071ff75b81bfddcce8598 (patch) | |
| tree | 06ae1511fd717a638d28550388fb2f52b312d179 /include/linux/tracepoint.h | |
| parent | Documentation: ftrace: Module globbing usage (diff) | |
| download | linux-dev-c63b7682b6d90530d3a071ff75b81bfddcce8598.tar.xz linux-dev-c63b7682b6d90530d3a071ff75b81bfddcce8598.zip | |
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 <tal.shorer@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/tracepoint.h')
| -rw-r--r-- | include/linux/tracepoint.h | 17 |
1 files changed, 14 insertions, 3 deletions
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 /** |