AC_DEFUN([AC_AMDGPU_GET_USER_PAGES_REMOTE], [
	AC_MSG_CHECKING([whether get_user_pages_remote() wants 8 args])
	AC_KERNEL_TEST_HEADER_FILE_EXIST([drm/drm_backport.h], [
dnl #
dnl # redhat 7.x wrap a get_user_pages_remote()
dnl #
		AC_KERNEL_TRY_COMPILE([
			#include <linux/sched.h>
			#include <drm/drm_backport.h>
		], [
			get_user_pages_remote(NULL, NULL, 0, 0, 0, NULL, NULL, NULL);
		], [
			AC_MSG_RESULT(yes)
			AC_DEFINE(HAVE_8ARGS_GET_USER_PAGES_REMOTE, 1, [get_user_pages_remote() get wrapped in drm_backport.h and wants 8 args])
		], [
			AC_MSG_RESULT(no)
		])
	], [
dnl #
dnl # commit 5b56d49fc31dbb0487e14ead790fc81ca9fb2c99
dnl # mm: add locked parameter to get_user_pages_remote()
dnl #
		AC_KERNEL_TRY_COMPILE_SYMBOL([
			#include <linux/mm.h>
		], [
			get_user_pages_remote(NULL, NULL, 0, 0, 0, NULL, NULL, NULL);
		], [get_user_pages_remote], [mm/gup.c], [
			AC_MSG_RESULT(yes)
			AC_DEFINE(HAVE_8ARGS_GET_USER_PAGES_REMOTE, 1, [get_user_pages_remote() wants 8 args])
		], [
			AC_MSG_RESULT(no)
		])
	])
])