SNDRV_PROTOCOL_VERSION 42 include/uapi/sound/asound.h #define SNDRV_PROTOCOL_VERSION(major, minor, subminor) (((major)<<16)|((minor)<<8)|(subminor)) SNDRV_PROTOCOL_VERSION 42 tools/include/uapi/sound/asound.h #define SNDRV_PROTOCOL_VERSION(major, minor, subminor) (((major)<<16)|((minor)<<8)|(subminor))