#include <sys/byteorder.h>
+/*
+ * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS will be defined by the Linux
+ * kernel for architectures which support efficient unaligned access.
+ */
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
+#define HAVE_EFFICIENT_UNALIGNED_ACCESS
+#endif
+
#if defined(__LITTLE_ENDIAN) && !defined(_LITTLE_ENDIAN)
#define _LITTLE_ENDIAN __LITTLE_ENDIAN
#endif