DMA_ATTR_MAX 19 include/linux/dma-attrs.h #define __DMA_ATTRS_LONGS BITS_TO_LONGS(DMA_ATTR_MAX) DMA_ATTR_MAX 49 include/linux/dma-attrs.h BUG_ON(attr >= DMA_ATTR_MAX); DMA_ATTR_MAX 62 include/linux/dma-attrs.h BUG_ON(attr >= DMA_ATTR_MAX);