dnl #
dnl #commit f808c13fd3738948e10196496959871130612b61
dnl #lib/interval_tree: fast overlap detection
dnl #
AC_DEFUN([AC_AMDGPU_INTERVAL_TREE_INSERT_HAVE_RB_ROOT_CACHED],
		[AC_MSG_CHECKING([whether interval_tree_insert have struct rb_root_cached])
		AC_KERNEL_TRY_COMPILE([
				#include <linux/interval_tree.h>
		],[
				struct rb_root_cached *r = NULL;
				interval_tree_insert(NULL, r);
		],[
				AC_MSG_RESULT(yes)
				AC_DEFINE(HAVE_TREE_INSERT_HAVE_RB_ROOT_CACHED, 1, [interval_tree_insert have struct rb_root_cached])
		],[
				AC_MSG_RESULT(no)
		])
])