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Diffstat (limited to 'backport-include/linux/tracepoint.h')
| -rw-r--r-- | backport-include/linux/tracepoint.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/backport-include/linux/tracepoint.h b/backport-include/linux/tracepoint.h new file mode 100644 index 0000000..6bb91ad --- /dev/null +++ b/backport-include/linux/tracepoint.h @@ -0,0 +1,142 @@ +#include_next <linux/tracepoint.h> + +#ifndef __BACKPORT_LINUX_TRACEPOINT_H +#define __BACKPORT_LINUX_TRACEPOINT_H + +#ifndef TRACE_DEFINE_ENUM +#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 */ |