ID_UNKNOWN 510 sound/core/oss/mixer_oss.c if (numid == ID_UNKNOWN) ID_UNKNOWN 548 sound/core/oss/mixer_oss.c if (numid == ID_UNKNOWN) ID_UNKNOWN 613 sound/core/oss/mixer_oss.c if (numid == ID_UNKNOWN) ID_UNKNOWN 652 sound/core/oss/mixer_oss.c if (numid == ID_UNKNOWN)