[PATCH v3] arm64: Do not defer reserve_crashkernel() for platforms with no DMA memory zones

[Pasha Tatashin]

Hi Vijay,

The patch looks good to me, just one nit below.

> -phys_addr_t arm64_dma_phys_limit __ro_after_init;
> +#if IS_ENABLED(CONFIG_ZONE_DMA) || IS_ENABLED(CONFIG_ZONE_DMA32)
> +phys_addr_t __ro_after_init arm64_dma_phys_limit;
> +#else
> +phys_addr_t __ro_after_init arm64_dma_phys_limit = PHYS_MASK + 1;

Since in this case arm64_dma_phys_limit is initialized during
declaration, it would make sense to use const instead of
__ro_after_init. Consider changing the above to this:
const phys_addr_t arm64_dma_phys_limit = PHYS_MASK + 1;

Reviewed-by: Pasha Tatashin <pasha.tatashin at soleen.com>

Thank you,
Pasha