From: Steven Rostedt <rost...@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) <rost...@goodmis.org>
---
include/linux/tracepoint.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 2b96c7e94c52..8026a0659580 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -223,7 +223,8 @@ static inline struct tracepoint
*tracepoint_ptr_deref(tracepoint_ptr_t *p)
#ifdef CONFIG_TRACEPOINT_VERIFY_USED
# define TRACEPOINT_CHECK(name)
\
- static void __used __section("__tracepoint_check") *__trace_check = \
+ static void __used __section("__tracepoint_check") * \
+ __trace_check_##name = \
&__tracepoint_##name;
#else
# define TRACEPOINT_CHECK(name)
@@ -381,10 +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)
--
2.47.2
