LXR linux/include/trace/define_custom

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Trace files that want to automate creation of all tracepoints defined
   4 * in their file should include this file. The following are macros that the
   5 * trace file may define:
   6 *
   7 * TRACE_SYSTEM defines the system the tracepoint is for
   8 *
   9 * TRACE_INCLUDE_FILE if the file name is something other than TRACE_SYSTEM.h
  10 *     This macro may be defined to tell define_trace.h what file to include.
  11 *     Note, leave off the ".h".
  12 *
  13 * TRACE_INCLUDE_PATH if the path is something other than core kernel include/trace
  14 *     then this macro can define the path to use. Note, the path is relative to
  15 *     define_trace.h, not the file including it. Full path names for out of tree
  16 *     modules must be used.
  17 */
  18
  19#ifdef CREATE_CUSTOM_TRACE_EVENTS
  20
  21/* Prevent recursion */
  22#undef CREATE_CUSTOM_TRACE_EVENTS
  23
  24#include <linux/stringify.h>
  25
  26#undef TRACE_CUSTOM_EVENT
  27#define TRACE_CUSTOM_EVENT(name, proto, args, tstruct, assign, print)
  28
  29#undef DEFINE_CUSTOM_EVENT
  30#define DEFINE_CUSTOM_EVENT(template, name, proto, args)
  31
  32#undef TRACE_INCLUDE
  33#undef __TRACE_INCLUDE
  34
  35#ifndef TRACE_INCLUDE_FILE
  36# define TRACE_INCLUDE_FILE TRACE_SYSTEM
  37# define UNDEF_TRACE_INCLUDE_FILE
  38#endif
  39
  40#ifndef TRACE_INCLUDE_PATH
  41# define __TRACE_INCLUDE(system) <trace/events/system.h>
  42# define UNDEF_TRACE_INCLUDE_PATH
  43#else
  44# define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
  45#endif
  46
  47# define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
  48
  49/* Let the trace headers be reread */
  50#define TRACE_CUSTOM_MULTI_READ
  51
  52#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  53
  54#ifdef TRACEPOINTS_ENABLED
  55#include <trace/trace_custom_events.h>
  56#endif
  57
  58#undef TRACE_CUSTOM_EVENT
  59#undef DECLARE_CUSTOM_EVENT_CLASS
  60#undef DEFINE_CUSTOM_EVENT
  61#undef TRACE_CUSTOM_MULTI_READ
  62
  63/* Only undef what we defined in this file */
  64#ifdef UNDEF_TRACE_INCLUDE_FILE
  65# undef TRACE_INCLUDE_FILE
  66# undef UNDEF_TRACE_INCLUDE_FILE
  67#endif
  68
  69#ifdef UNDEF_TRACE_INCLUDE_PATH
  70# undef TRACE_INCLUDE_PATH
  71# undef UNDEF_TRACE_INCLUDE_PATH
  72#endif
  73
  74/* We may be processing more files */
  75#define CREATE_CUSTOM_TRACE_POINTS
  76
  77#endif /* CREATE_CUSTOM_TRACE_POINTS */
  78