DSP_CAP_REALTIME 1995 sound/core/oss/pcm_oss.c #if defined(DSP_CAP_REALTIME) && 0 DSP_CAP_REALTIME 1999 sound/core/oss/pcm_oss.c res &= ~DSP_CAP_REALTIME; DSP_CAP_REALTIME 2009 sound/core/oss/pcm_oss.c result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;