tracing: Replace trace_event struct array with pointer array

[linux-flexiantxendom0-natty.git] / include / trace / ftrace.h

diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index e16610c..3e68366 100644 (file)
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -446,14 +446,16 @@ static inline notrace int ftrace_get_offsets_##call(                      \
  *     .reg                    = ftrace_event_reg,
  * };
  *
- * static struct ftrace_event_call __used
- * __attribute__((__aligned__(4)))
- * __attribute__((section("_ftrace_events"))) event_<call> = {
+ * static struct ftrace_event_call event_<call> = {
  *     .name                   = "<call>",
  *     .class                  = event_class_<template>,
  *     .event                  = &ftrace_event_type_<call>,
  *     .print_fmt              = print_fmt_<call>,
  * };
+ * // its only safe to use pointers when doing linker tricks to
+ * // create an array.
+ * static struct ftrace_event_call __used
+ * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
  *
  */
 
@@ -579,28 +581,28 @@ static struct ftrace_event_class __used event_class_##call = {            \
 #undef DEFINE_EVENT
 #define DEFINE_EVENT(template, call, proto, args)                      \
                                                                        \
-static struct ftrace_event_call __used                                 \
-__attribute__((__aligned__(4)))                                                \
-__attribute__((section("_ftrace_events"))) event_##call = {            \
+static struct ftrace_event_call __used event_##call = {                        \
        .name                   = #call,                                \
        .class                  = &event_class_##template,              \
        .event.funcs            = &ftrace_event_type_funcs_##template,  \
        .print_fmt              = print_fmt_##template,                 \
-};
+};                                                                     \
+static struct ftrace_event_call __used                                 \
+__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 
 #undef DEFINE_EVENT_PRINT
 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)         \
                                                                        \
 static const char print_fmt_##call[] = print;                          \
                                                                        \
-static struct ftrace_event_call __used                                 \
-__attribute__((__aligned__(4)))                                                \
-__attribute__((section("_ftrace_events"))) event_##call = {            \
+static struct ftrace_event_call __used event_##call = {                        \
        .name                   = #call,                                \
        .class                  = &event_class_##template,              \
        .event.funcs            = &ftrace_event_type_funcs_##call,      \
        .print_fmt              = print_fmt_##call,                     \
-}
+};                                                                     \
+static struct ftrace_event_call __used                                 \
+__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 
 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)