On Tue, Aug 20, 2019 at 04:58:18PM +0200, Nicolas Saenz Julienne wrote: > - if (IS_ENABLED(CONFIG_ZONE_DMA)) > + if (IS_ENABLED(CONFIG_ZONE_DMA)) { > arm64_dma_phys_limit = max_zone_dma_phys(); > + zone_dma_bits = ilog2((arm64_dma_phys_limit - 1) & GENMASK_ULL(31, 0)) + 1; This adds a way too long line. I also find the use of GENMASK_ULL horribly obsfucating, but I know that opinion is't shared by everyone.