[PATCH 05/12] header: Add trace_##name##_enabled()
Hauke Mehrtens <[email protected]>
| Newsgroups | org.kernel.vger.backports |
|---|---|
| Message-ID | <[email protected]> |
This adds the function trace_##name##_enabled to __DECLARE_TRACE() which
was added in commit 7c65bbc7dc ("tracing: Add
trace_<tracepoint>_enabled() function"). This is now used by ath10k.
__DECLARE_TRACE() got other changes wit kernel 3.16, so add two
different versions.
Signed-off-by: Hauke Mehrtens <[email protected]>
---
backport/backport-include/linux/tracepoint.h | 132 +++++++++++++++++++
1 file changed, 132 insertions(+)
diff --git a/backport/backport-include/linux/tracepoint.h b/backport/backport-include/linux/tracepoint.h
index a695c6fc..6bb91ad3 100644
--- a/backport/backport-include/linux/tracepoint.h
+++ b/backport/backport-include/linux/tracepoint.h
@@ -7,4 +7,136 @@
#define TRACE_DEFINE_ENUM(a)
#endif
+#if LINUX_VERSION_IS_LESS(3,15,0)
+#ifdef TRACEPOINTS_ENABLED
+#undef __DECLARE_TRACE
+#define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
+ extern struct tracepoint __tracepoint_##name; \
+ static inline void trace_##name(proto) \
+ { \
+ if (static_key_false(&__tracepoint_##name.key)) \
+ __DO_TRACE(&__tracepoint_##name, \
+ TP_PROTO(data_proto), \
+ TP_ARGS(data_args), \
+ TP_CONDITION(cond),,); \
+ } \
+ __DECLARE_TRACE_RCU(name, PARAMS(proto), PARAMS(args), \
+ PARAMS(cond), PARAMS(data_proto), PARAMS(data_args)) \
+ static inline int \
+ register_trace_##name(void (*probe)(data_proto), void *data) \
+ { \
+ return tracepoint_probe_register(#name, (void *)probe, \
+ data); \
+ } \
+ static inline int \
+ unregister_trace_##name(void (*probe)(data_proto), void *data) \
+ { \
+ return tracepoint_probe_unregister(#name, (void *)probe, \
+ data); \
+ } \
+ static inline void \
+ check_trace_callback_type_##name(void (*cb)(data_proto)) \
+ { \
+ } \
+ static inline bool \
+ trace_##name##_enabled(void) \
+ { \
+ return static_key_false(&__tracepoint_##name.key); \
+ }
+
+#else
+#undef __DECLARE_TRACE
+#define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
+ static inline void trace_##name(proto) \
+ { } \
+ static inline void trace_##name##_rcuidle(proto) \
+ { } \
+ static inline int \
+ register_trace_##name(void (*probe)(data_proto), \
+ void *data) \
+ { \
+ return -ENOSYS; \
+ } \
+ static inline int \
+ unregister_trace_##name(void (*probe)(data_proto), \
+ void *data) \
+ { \
+ return -ENOSYS; \
+ } \
+ static inline void check_trace_callback_type_##name(void (*cb)(data_proto)) \
+ { \
+ } \
+ static inline bool \
+ trace_##name##_enabled(void) \
+ { \
+ return false; \
+ }
+#endif /* TRACEPOINTS_ENABLED */
+#elif LINUX_VERSION_IS_LESS(3,16,0)
+#ifdef TRACEPOINTS_ENABLED
+#undef __DECLARE_TRACE
+#define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
+ extern struct tracepoint __tracepoint_##name; \
+ static inline void trace_##name(proto) \
+ { \
+ if (static_key_false(&__tracepoint_##name.key)) \
+ __DO_TRACE(&__tracepoint_##name, \
+ TP_PROTO(data_proto), \
+ TP_ARGS(data_args), \
+ TP_CONDITION(cond),,); \
+ } \
+ __DECLARE_TRACE_RCU(name, PARAMS(proto), PARAMS(args), \
+ PARAMS(cond), PARAMS(data_proto), PARAMS(data_args)) \
+ static inline int \
+ register_trace_##name(void (*probe)(data_proto), void *data) \
+ { \
+ return tracepoint_probe_register(&__tracepoint_##name, \
+ (void *)probe, data); \
+ } \
+ static inline int \
+ unregister_trace_##name(void (*probe)(data_proto), void *data) \
+ { \
+ return tracepoint_probe_unregister(&__tracepoint_##name,\
+ (void *)probe, data); \
+ } \
+ static inline void \
+ check_trace_callback_type_##name(void (*cb)(data_proto)) \
+ { \
+ } \
+ static inline bool \
+ trace_##name##_enabled(void) \
+ { \
+ return static_key_false(&__tracepoint_##name.key); \
+ }
+
+#else
+#undef __DECLARE_TRACE
+#define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
+ static inline void trace_##name(proto) \
+ { } \
+ static inline void trace_##name##_rcuidle(proto) \
+ { } \
+ static inline int \
+ register_trace_##name(void (*probe)(data_proto), \
+ void *data) \
+ { \
+ return -ENOSYS; \
+ } \
+ static inline int \
+ unregister_trace_##name(void (*probe)(data_proto), \
+ void *data) \
+ { \
+ return -ENOSYS; \
+ } \
+ static inline void check_trace_callback_type_##name(void (*cb)(data_proto)) \
+ { \
+ } \
+ static inline bool \
+ trace_##name##_enabled(void) \
+ { \
+ return false; \
+ }
+#endif /* TRACEPOINTS_ENABLED */
+#endif /* < 3.16 */
+
#endif /* __BACKPORT_LINUX_TRACEPOINT_H */
--
2.20.1
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