diff options
Diffstat (limited to 'include/linux/tracepoint.h')
| -rw-r--r-- | include/linux/tracepoint.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index 826ce3f8e1f8..8a56f3278b1b 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -222,6 +222,15 @@ static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p) } /* + * When a tracepoint is used, it's name is added to the __tracepoint_check + * section. This section is only used at build time to make sure all + * defined tracepoints are used. It is discarded after the build. + */ +# define TRACEPOINT_CHECK(name) \ + static const char __used __section("__tracepoint_check") \ + __trace_check_##name[] = #name; + +/* * Make sure the alignment of the structure in the __tracepoints section will * not add unwanted padding between the beginning of the section and the * structure. Force alignment to the same alignment as the section start. @@ -270,6 +279,7 @@ static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p) __DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto)) \ static inline void __do_trace_##name(proto) \ { \ + TRACEPOINT_CHECK(name) \ if (cond) { \ guard(preempt_notrace)(); \ __DO_TRACE_CALL(name, TP_ARGS(args)); \ @@ -289,6 +299,7 @@ static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p) __DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto)) \ static inline void __do_trace_##name(proto) \ { \ + TRACEPOINT_CHECK(name) \ guard(rcu_tasks_trace)(); \ __DO_TRACE_CALL(name, TP_ARGS(args)); \ } \ @@ -371,10 +382,12 @@ static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p) __DEFINE_TRACE_EXT(_name, NULL, PARAMS(_proto), PARAMS(_args)); #define EXPORT_TRACEPOINT_SYMBOL_GPL(name) \ + TRACEPOINT_CHECK(name) \ EXPORT_SYMBOL_GPL(__tracepoint_##name); \ EXPORT_SYMBOL_GPL(__traceiter_##name); \ EXPORT_STATIC_CALL_GPL(tp_func_##name) #define EXPORT_TRACEPOINT_SYMBOL(name) \ + TRACEPOINT_CHECK(name) \ EXPORT_SYMBOL(__tracepoint_##name); \ EXPORT_SYMBOL(__traceiter_##name); \ EXPORT_STATIC_CALL(tp_func_##name) |