extern int compat_futex_async(int32_t *uaddr, int op, int32_t val,
const struct timespec *timeout, int32_t *uaddr2, int32_t val3);
-#if (defined(__linux__) && defined(__NR_futex_))
+#if (defined(__linux__) && defined(__NR_futex))
/* For backwards compat */
#define CONFIG_RCU_HAVE_FUTEX 1