fnvlist_add_int64
fnvlist_add_int64(errlist, vd_path, err);
fnvlist_add_int64(nvl, UI2C_IOCTL_NVL_TYPE, I2C_ADDR_7BIT);
fnvlist_add_int64(nvl, key, 1);
fnvlist_add_int64(nvl, buf, i);
fnvlist_add_int64(vdev_errlist, guid_as_str, error);
fnvlist_add_int64(vdev_errlist, guid_as_str, error);
fnvlist_add_int64(nvl, key, lua_tonumber(state, index));
fnvlist_add_int64(lognv, ZPOOL_HIST_ERRNO,
void fnvlist_add_int64(nvlist_t *, const char *, int64_t);