ac97_mutex 115 sound/pci/sis7019.c struct mutex ac97_mutex; ac97_mutex 932 sound/pci/sis7019.c mutex_lock(&sis->ac97_mutex); ac97_mutex 971 sound/pci/sis7019.c mutex_unlock(&sis->ac97_mutex); ac97_mutex 1322 sound/pci/sis7019.c mutex_init(&sis->ac97_mutex);