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-rw-r--r--include/linux/tracepoint.h29
-rw-r--r--include/trace/define_trace.h15
2 files changed, 38 insertions, 6 deletions
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 5a6074fcd81d..d3e4f87e95c0 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -106,6 +106,7 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
#define TP_PROTO(args...) args
#define TP_ARGS(args...) args
+#define TP_CONDITION(args...) args
#ifdef CONFIG_TRACEPOINTS
@@ -119,12 +120,14 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
* as "(void *, void)". The DECLARE_TRACE_NOARGS() will pass in just
* "void *data", where as the DECLARE_TRACE() will pass in "void *data, proto".
*/
-#define __DO_TRACE(tp, proto, args) \
+#define __DO_TRACE(tp, proto, args, cond) \
do { \
struct tracepoint_func *it_func_ptr; \
void *it_func; \
void *__data; \
\
+ if (!(cond)) \
+ return; \
rcu_read_lock_sched_notrace(); \
it_func_ptr = rcu_dereference_sched((tp)->funcs); \
if (it_func_ptr) { \
@@ -142,7 +145,7 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
* not add unwanted padding between the beginning of the section and the
* structure. Force alignment to the same alignment as the section start.
*/
-#define __DECLARE_TRACE(name, proto, args, data_proto, data_args) \
+#define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
extern struct tracepoint __tracepoint_##name; \
static inline void trace_##name(proto) \
{ \
@@ -151,7 +154,8 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
do_trace: \
__DO_TRACE(&__tracepoint_##name, \
TP_PROTO(data_proto), \
- TP_ARGS(data_args)); \
+ TP_ARGS(data_args), \
+ TP_CONDITION(cond)); \
} \
static inline int \
register_trace_##name(void (*probe)(data_proto), void *data) \
@@ -186,7 +190,7 @@ do_trace: \
EXPORT_SYMBOL(__tracepoint_##name)
#else /* !CONFIG_TRACEPOINTS */
-#define __DECLARE_TRACE(name, proto, args, data_proto, data_args) \
+#define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
static inline void trace_##name(proto) \
{ } \
static inline int \
@@ -227,13 +231,18 @@ do_trace: \
* "void *__data, proto" as the callback prototype.
*/
#define DECLARE_TRACE_NOARGS(name) \
- __DECLARE_TRACE(name, void, , void *__data, __data)
+ __DECLARE_TRACE(name, void, , 1, void *__data, __data)
#define DECLARE_TRACE(name, proto, args) \
- __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), \
+ __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), 1, \
PARAMS(void *__data, proto), \
PARAMS(__data, args))
+#define DECLARE_TRACE_CONDITION(name, proto, args, cond) \
+ __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \
+ PARAMS(void *__data, proto), \
+ PARAMS(__data, args))
+
#define TRACE_EVENT_FLAGS(event, flag)
#endif /* DECLARE_TRACE */
@@ -349,12 +358,20 @@ do_trace: \
DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+#define DEFINE_EVENT_CONDITION(template, name, proto, \
+ args, cond) \
+ DECLARE_TRACE_CONDITION(name, PARAMS(proto), \
+ PARAMS(args), PARAMS(cond))
#define TRACE_EVENT(name, proto, args, struct, assign, print) \
DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
#define TRACE_EVENT_FN(name, proto, args, struct, \
assign, print, reg, unreg) \
DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+#define TRACE_EVENT_CONDITION(name, proto, args, cond, \
+ struct, assign, print) \
+ DECLARE_TRACE_CONDITION(name, PARAMS(proto), \
+ PARAMS(args), PARAMS(cond))
#define TRACE_EVENT_FLAGS(event, flag)
diff --git a/include/trace/define_trace.h b/include/trace/define_trace.h
index 1dfab5401511..b0b4eb24d592 100644
--- a/include/trace/define_trace.h
+++ b/include/trace/define_trace.h
@@ -26,6 +26,15 @@
#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
DEFINE_TRACE(name)
+#undef TRACE_EVENT_CONDITION
+#define TRACE_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \
+ TRACE_EVENT(name, \
+ PARAMS(proto), \
+ PARAMS(args), \
+ PARAMS(tstruct), \
+ PARAMS(assign), \
+ PARAMS(print))
+
#undef TRACE_EVENT_FN
#define TRACE_EVENT_FN(name, proto, args, tstruct, \
assign, print, reg, unreg) \
@@ -39,6 +48,10 @@
#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
DEFINE_TRACE(name)
+#undef DEFINE_EVENT_CONDITION
+#define DEFINE_EVENT_CONDITION(template, name, proto, args, cond) \
+ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
#undef DECLARE_TRACE
#define DECLARE_TRACE(name, proto, args) \
DEFINE_TRACE(name)
@@ -75,9 +88,11 @@
#undef TRACE_EVENT
#undef TRACE_EVENT_FN
+#undef TRACE_EVENT_CONDITION
#undef DECLARE_EVENT_CLASS
#undef DEFINE_EVENT
#undef DEFINE_EVENT_PRINT
+#undef DEFINE_EVENT_CONDITION
#undef TRACE_HEADER_MULTI_READ
#undef DECLARE_TRACE