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dnl #
dnl # Ensure the DECLARE_EVENT_CLASS macro is available to non-GPL modules.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_DECLARE_EVENT_CLASS], [
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-I\$(src)"
AC_MSG_CHECKING([whether DECLARE_EVENT_CLASS() is available])
ZFS_LINUX_TRY_COMPILE_HEADER([
#include <linux/module.h>
MODULE_LICENSE(ZFS_META_LICENSE);
#define CREATE_TRACE_POINTS
#include "conftest.h"
],[
trace_zfs_autoconf_event_one(1UL);
trace_zfs_autoconf_event_two(2UL);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_DECLARE_EVENT_CLASS, 1,
[DECLARE_EVENT_CLASS() is available])
],[
AC_MSG_RESULT(no)
],[
#if !defined(_CONFTEST_H) || defined(TRACE_HEADER_MULTI_READ)
#define _CONFTEST_H
#undef TRACE_SYSTEM
#define TRACE_SYSTEM zfs
#include <linux/tracepoint.h>
DECLARE_EVENT_CLASS(zfs_autoconf_event_class,
TP_PROTO(unsigned long i),
TP_ARGS(i),
TP_STRUCT__entry(
__field(unsigned long, i)
),
TP_fast_assign(
__entry->i = i;
),
TP_printk("i = %lu", __entry->i)
);
#define DEFINE_AUTOCONF_EVENT(name) \
DEFINE_EVENT(zfs_autoconf_event_class, name, \
TP_PROTO(unsigned long i), \
TP_ARGS(i))
DEFINE_AUTOCONF_EVENT(zfs_autoconf_event_one);
DEFINE_AUTOCONF_EVENT(zfs_autoconf_event_two);
#endif /* _CONFTEST_H */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE conftest
#include <trace/define_trace.h>
])
EXTRA_KCFLAGS="$tmp_flags"
])
|
