ARCH_ZONE_DMA_BITS  341 arch/powerpc/include/asm/page.h #define ARCH_ZONE_DMA_BITS 30
ARCH_ZONE_DMA_BITS  343 arch/powerpc/include/asm/page.h #define ARCH_ZONE_DMA_BITS 31
ARCH_ZONE_DMA_BITS  182 arch/s390/include/asm/page.h #define ARCH_ZONE_DMA_BITS	31
ARCH_ZONE_DMA_BITS   23 kernel/dma/direct.c #define ARCH_ZONE_DMA_BITS 24