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(2,6,32))
   7 /*
   8  * Disable all tracing for older kernels
   9  * < 2.6.27             had no tracing
  10  * 2.6.27               had broken tracing
  11  * 2.6.28-2.6.32        didn't have anything like DECLARE_EVENT_CLASS
  12  *                      and faking it would be extremely difficult
  13  */
  14 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
  15 /*
  16  * For 2.6.28+ include the original tracepoint.h but override
  17  * the defines new code uses to disable tracing completely.
  18  */
  19 #include_next <linux/tracepoint.h>
  20 #endif
  21
  22 #undef TRACE_EVENT
  23 #define TRACE_EVENT(name, proto, ...) \
  24 static inline void trace_ ## name(proto) {}
  25 #undef DECLARE_EVENT_CLASS
  26 #define DECLARE_EVENT_CLASS(...)
  27 #undef DEFINE_EVENT
  28 #define DEFINE_EVENT(evt_class, name, proto, ...) \
  29 static inline void trace_ ## name(proto) {}
  30
  31 #define TP_PROTO(args...)       args
  32 #define TP_ARGS(args...)        args
  33 #define TP_CONDITION(args...)   args
  34
  35 #else
  36 /* since 2.6.33, tracing hasn't changed, so just include the kernel's file */
  37 #include_next <linux/tracepoint.h>
  38
  39 #endif /* (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,32)) */
  40
  41 #endif  /* _COMPAT_LINUX_TRACEPOINT_H */