Re: [PATCH v2 10/11] arm64: edit zone_dma_bits to fine tune dma-direct min mask

[Christoph Hellwig]

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.