include/linux/tracepoint.h

   1 #ifndef _COMPAT_LINUX_TRACEPOINT_H
   2 #define _COMPAT_LINUX_TRACEPOINT_H 1
   3
   4 #include <linux/version.h>
   5
   6 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,27))
   7
   8 #include_next <linux/tracepoint.h>
   9
  10 /* Backports f42c85e7 */
  11 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30))
  12 #undef TP_STRUCT__entry
  13 #define TP_STRUCT__entry(args...) args
  14 #endif
  15
  16 /* Backports 091ad365, a rename */
  17 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33))
  18 #define DECLARE_EVENT_CLASS TRACE_EVENT_TEMPLATE
  19 #endif
  20
  21 /* Backpports 2939b0469 */
  22 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30))
  23 #define TP_PROTO TPPROTO
  24 #define TP_ARGS TPARGS
  25 #define TP_FMT TPFMT
  26 #define TP_RAW_FMT TPRAWFMT
  27 #endif
  28
  29 /* Force disabling tracing */
  30
  31 #undef PARAMS
  32 #define PARAMS(args...) args
  33
  34 #undef TRACE_EVENT
  35 #define TRACE_EVENT(name, proto, ...) \
  36 DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
  37
  38 #undef DECLARE_EVENT_CLASS
  39 #define DECLARE_EVENT_CLASS(...)
  40 #undef DEFINE_EVENT
  41
  42 #define DEFINE_EVENT(template, name, proto, args)               \
  43         DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
  44
  45 #undef DECLARE_TRACE_NOARGS
  46 #define DECLARE_TRACE_NOARGS(name)                                      \
  47                 __DECLARE_TRACE(name, void, , 1, void *__data, __data)
  48
  49
  50 /* Backports 38516ab59fbc5b3bb278cf5e1fe2867c70cff32e */
  51 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35))
  52
  53 #undef DECLARE_TRACE
  54 #define DECLARE_TRACE(name, proto, args)                                \
  55                 __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), 1,   \
  56                                 PARAMS(void *__data, proto),            \
  57                                 PARAMS(__data, args))
  58
  59 #undef DECLARE_TRACE_CONDITION
  60 #define DECLARE_TRACE_CONDITION(name, proto, args, cond)                \
  61         __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \
  62                         PARAMS(void *__data, proto),                    \
  63                         PARAMS(__data, args))
  64
  65 #else
  66
  67 #undef DECLARE_TRACE
  68 #define DECLARE_TRACE(name, proto, args)                                \
  69                 __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), 1,   \
  70                                 PARAMS(void *__data, proto),            \
  71                                 PARAMS(__data, args))
  72
  73 #undef DECLARE_TRACE_CONDITION
  74 #define DECLARE_TRACE_CONDITION(name, proto, args, cond)                \
  75         __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \
  76                         PARAMS(void *__data, proto),                    \
  77                         PARAMS(__data, args))
  78 #endif /* backport 38516ab59fbc5b3bb278cf5e1fe2867c70cff32e */
  79
  80 /* Backports 38516ab59fbc5b3bb278cf5e1fe2867c70cff32e */
  81 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35))
  82
  83 /* Backports c420970ef476d7d68df119711700666224001f43 */
  84 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30))
  85
  86 #undef __DECLARE_TRACE
  87 #define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
  88         static inline void trace_##name(proto)                          \
  89         { }                                                             \
  90         static inline void trace_##name##_rcuidle(proto)                \
  91         { }                                                             \
  92         static inline int                                               \
  93         register_trace_##name(void (*probe)(proto))                     \
  94         {                                                               \
  95                 return -ENOSYS;                                         \
  96         }                                                               \
  97         static inline void                                              \
  98         unregister_trace_##name(void (*probe)(proto))                   \
  99         {                                                               \
 100         }                                                               \
 101         static inline void check_trace_callback_type_##name(void (*cb)(data_proto)) \
 102         {                                                               \
 103         }
 104 #else
 105
 106 #undef __DECLARE_TRACE
 107 #define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
 108         static inline void trace_##name(proto)                          \
 109         { }                                                             \
 110         static inline void trace_##name##_rcuidle(proto)                \
 111         { }                                                             \
 112         static inline int                                               \
 113         register_trace_##name(void (*probe)(proto))                     \
 114         {                                                               \
 115                 return -ENOSYS;                                         \
 116         }                                                               \
 117         static inline int                                               \
 118         unregister_trace_##name(void (*probe)(proto))                   \
 119         {                                                               \
 120                 return -ENOSYS;                                         \
 121         }                                                               \
 122         static inline void check_trace_callback_type_##name(void (*cb)(data_proto)) \
 123         {                                                               \
 124         }
 125 #endif /* backport c420970ef476d7d68df119711700666224001f43 */
 126
 127 #else
 128
 129 #undef __DECLARE_TRACE
 130 #define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
 131         static inline void trace_##name(proto)                          \
 132         { }                                                             \
 133         static inline void trace_##name##_rcuidle(proto)                \
 134         { }                                                             \
 135         static inline int                                               \
 136         register_trace_##name(void (*probe)(data_proto),                \
 137                               void *data)                               \
 138         {                                                               \
 139                 return -ENOSYS;                                         \
 140         }                                                               \
 141         static inline int                                               \
 142         unregister_trace_##name(void (*probe)(data_proto),              \
 143                                 void *data)                             \
 144         {                                                               \
 145                 return -ENOSYS;                                         \
 146         }                                                               \
 147         static inline void check_trace_callback_type_##name(void (*cb)(data_proto)) \
 148         {                                                               \
 149         }
 150
 151 #endif /* backport 38516ab59fbc5b3bb278cf5e1fe2867c70cff32e */
 152
 153 #undef DEFINE_TRACE_FN
 154 #define DEFINE_TRACE_FN(name, reg, unreg)
 155
 156 #undef DEFINE_TRACE
 157 #define DEFINE_TRACE(name)
 158
 159 #undef EXPORT_TRACEPOINT_SYMBOL_GPL
 160 #define EXPORT_TRACEPOINT_SYMBOL_GPL(name)
 161
 162 #undef EXPORT_TRACEPOINT_SYMBOL
 163 #define EXPORT_TRACEPOINT_SYMBOL(name)
 164
 165 #ifdef CONFIG_TRACEPOINTS
 166 #else /* CONFIG_TRACEPOINTS */
 167 #endif /* CONFIG_TRACEPOINTS */
 168
 169 #else /* just disable tracing */
 170
 171 /* Disable all tracing */
 172 #undef TRACE_EVENT
 173 #define TRACE_EVENT(name, proto, ...) \
 174 static inline void trace_ ## name(proto) {}
 175 #undef DECLARE_EVENT_CLASS
 176 #define DECLARE_EVENT_CLASS(...)
 177 #undef DEFINE_EVENT
 178 #define DEFINE_EVENT(evt_class, name, proto, ...) \
 179 static inline void trace_ ## name(proto) {}
 180
 181 #define TP_PROTO(args...)  args
 182 #define TP_ARGS(args...)   args
 183 #define TP_CONDITION(args...)      args
 184
 185 #endif /* (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,27)) */
 186
 187 #endif  /* _COMPAT_LINUX_TRACEPOINT_H */