dnl #
dnl # 4.18: ktime_get_coarse_real_ts64() added.  Use it in place of
dnl # current_kernel_time64().
dnl #
AC_DEFUN([ZFS_AC_KERNEL_KTIME_GET_COARSE_REAL_TS64],
	[AC_MSG_CHECKING([whether ktime_get_coarse_real_ts64() exists])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/mm.h>
	], [
		struct timespec64 ts;
		ktime_get_coarse_real_ts64(&ts);
	], [
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_KTIME_GET_COARSE_REAL_TS64, 1, [ktime_get_coarse_real_ts64() exists])
	], [
		AC_MSG_RESULT(no)
	])
])