[PATCH v6 3/3] tracepoint: Do not warn for unused event that is exported
From: Steven Rostedt <rostedt@kernel.org>
Date: 2025-08-20 17:48:25
Also in:
linux-kbuild, lkml
Subsystem:
the rest, tracing · Maintainers:
Linus Torvalds, Steven Rostedt, Masami Hiramatsu
From: Steven Rostedt <rostedt@goodmis.org> There are a few generic events that may only be used by modules. They are defined and then set with EXPORT_TRACEPOINT*(). Mark events that are exported as being used, even though they still waste memory in the kernel proper. Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> --- include/linux/tracepoint.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 71d2e085c49e..ec6827d00d79 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h@@ -223,8 +223,8 @@ static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p) #ifdef CONFIG_TRACEPOINT_WARN_ON_UNUSED # define TRACEPOINT_CHECK(name) \ - static const char __used __section("__tracepoint_check") __trace_check[] = \ - #name; + static const char __used __section("__tracepoint_check") \ + __trace_check_##name[] = #name; #else # define TRACEPOINT_CHECK(tname) #endif
@@ -381,10 +381,12 @@ 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)
--
2.50.1