dnl #
dnl # commit 2c935bc57221cc2edc787c72ea0e2d30cdcd3d5e
dnl # locking/atomic, kref: Add kref_read()
dnl #
AC_DEFUN([AC_AMDGPU_KREF_READ],
	[AC_MSG_CHECKING([whether kref_read() function is available])
	AC_KERNEL_TRY_COMPILE([
		#include <linux/kref.h>
	],[
		kref_read(NULL);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_KREF_READ, 1, [kref_read() function is available])
	],[
		AC_MSG_RESULT(no)
	])
])