config/kernel-assign_str.m4

   1 dnl #
   2 dnl # 6.10 kernel, check number of args of __assign_str() for trace:
   3 dnl
   4 dnl # 6.10+:           one arg
   5 dnl # 6.9 and older:   two args
   6 dnl #
   7 dnl # More specifically, this will test to see if __assign_str() takes one
   8 dnl # arg.  If __assign_str() takes two args, or is not defined, then
   9 dnl # HAVE_1ARG_ASSIGN_STR will not be set.
  10 dnl #
  11 AC_DEFUN([ZFS_AC_KERNEL_1ARG_ASSIGN_STR], [
  12        AC_MSG_CHECKING([whether __assign_str() has one arg])
  13        ZFS_LINUX_TRY_COMPILE_HEADER([
  14                #include <linux/module.h>
  15                MODULE_LICENSE("$ZFS_META_LICENSE");
  16
  17                #define CREATE_TRACE_POINTS
  18                #include "conftest.h"
  19        ],[
  20                trace_zfs_autoconf_event_one("1");
  21                trace_zfs_autoconf_event_two("2");
  22        ],[
  23                AC_MSG_RESULT(yes)
  24                AC_DEFINE(HAVE_1ARG_ASSIGN_STR, 1,
  25                    [__assign_str() has one arg])
  26        ],[
  27                AC_MSG_RESULT(no)
  28        ],[
  29                #if !defined(_CONFTEST_H) || defined(TRACE_HEADER_MULTI_READ)
  30                #define _CONFTEST_H
  31
  32                #undef  TRACE_SYSTEM
  33                #define TRACE_SYSTEM zfs
  34                #include <linux/tracepoint.h>
  35
  36                DECLARE_EVENT_CLASS(zfs_autoconf_event_class,
  37                        TP_PROTO(char *string),
  38                        TP_ARGS(string),
  39                        TP_STRUCT__entry(
  40                                __string(str, string)
  41                        ),
  42                        TP_fast_assign(
  43                                __assign_str(str);
  44                        ),
  45                        TP_printk("str = %s", __get_str(str))
  46                );
  47
  48                #define DEFINE_AUTOCONF_EVENT(name) \
  49                DEFINE_EVENT(zfs_autoconf_event_class, name, \
  50                        TP_PROTO(char * str), \
  51                        TP_ARGS(str))
  52                DEFINE_AUTOCONF_EVENT(zfs_autoconf_event_one);
  53                DEFINE_AUTOCONF_EVENT(zfs_autoconf_event_two);
  54
  55                #endif /* _CONFTEST_H */
  56
  57                #undef  TRACE_INCLUDE_PATH
  58                #define TRACE_INCLUDE_PATH .
  59                #define TRACE_INCLUDE_FILE conftest
  60                #include <trace/define_trace.h>
  61        ])
  62 ])