preallocate_dma 19 sound/core/pcm_memory.c static int preallocate_dma = 1; preallocate_dma 20 sound/core/pcm_memory.c module_param(preallocate_dma, int, 0444); preallocate_dma 21 sound/core/pcm_memory.c MODULE_PARM_DESC(preallocate_dma, "Preallocate DMA memory when the PCM devices are initialized."); preallocate_dma 200 sound/core/pcm_memory.c if (size > 0 && preallocate_dma && substream->number < maximum_substreams)