MAX_DMA_PFN 808 arch/x86/mm/init_64.c max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; MAX_DMA_PFN 1043 arch/x86/mm/init_64.c if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) { MAX_DMA_PFN 574 arch/x86/mm/numa_64.c max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; MAX_DMA_PFN 87 include/asm-x86/dma.h #define MAX_DMA_ADDRESS ((unsigned long)__va(MAX_DMA_PFN << PAGE_SHIFT))