diff options
Diffstat (limited to 'config/kernel-declare-event-class.m4')
| -rw-r--r-- | config/kernel-declare-event-class.m4 | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/config/kernel-declare-event-class.m4 b/config/kernel-declare-event-class.m4 new file mode 100644 index 000000000000..6c78ee858d7d --- /dev/null +++ b/config/kernel-declare-event-class.m4 @@ -0,0 +1,55 @@ +dnl # +dnl # Ensure the DECLARE_EVENT_CLASS macro is available to non-GPL modules. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_DECLARE_EVENT_CLASS], [ + 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> + ]) +]) |