mpu_command_rec 542 include/linux/soundcard.h #define SNDCTL_MIDI_MPUCMD _SIOWR('m', 2, mpu_command_rec) mpu_command_rec 675 sound/oss/mpu401.c static mpu_command_rec rec; mpu_command_rec 725 sound/oss/mpu401.c mpu_command_rec rec;