buffmem_desc      627 include/linux/soundcard.h #define SNDCTL_DSP_MAPINBUF		_SIOR ('P', 19, buffmem_desc)
buffmem_desc      628 include/linux/soundcard.h #define SNDCTL_DSP_MAPOUTBUF		_SIOR ('P', 20, buffmem_desc)
buffmem_desc     2584 sound/core/oss/pcm_oss.c 			(struct buffmem_desc __user *) arg);