DMA_RESERVED_BYTES 171 arch/hexagon/mm/init.c max_low_pfn = bootmem_lastpg - PFN_DOWN(DMA_RESERVED_BYTES); DMA_RESERVED_BYTES 173 arch/hexagon/mm/init.c memblock_reserve(PFN_PHYS(max_low_pfn), DMA_RESERVED_BYTES);