#define __LITTLE_ENDIAN LITTLE_ENDIAN
#endif
-#define __u_bswap16(x) ((uint16_t)((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)))
+#define __u_bswap16(x) ({ uint16_t val = (x); ((uint16_t)(((val >> 8) & 0xffu) | ((val & 0xffu) << 8))); })
#if _GNUC_MIN_VER(4, 2)
#define __u_bswap32(x) __builtin_bswap32(x)