[PATCH 2/6] ARM: keystone2: move update of the phys-to-virt constants into generic code

[Russell King - ARM Linux]

On Thu, Apr 09, 2015 at 05:51:14PM +0300, Grygorii.Strashko at linaro.org wrote:
> @@ -1401,14 +1401,15 @@ void __init early_paging_init(const struct machine_desc *mdesc)
>  	pgtables_remap *lpae_pgtables_remap;
>  	unsigned long pa_pgd;
>  	unsigned int cr;
> -	long long offset;
> +	phys_addr_t new_phys_offset;
> +	phys_addr_t old_phys_offset = PHYS_OFFSET;
>  	void *boot_data;
>  
>  	if (!mdesc->pv_fixup)
>  		return;
>  
> -	offset = mdesc->pv_fixup();
> -	if (offset == 0)
> +	new_phys_offset = mdesc->pv_fixup();
> +	if (new_phys_offset == 0)

"0" is a special magic value here.  The advantage of the delta approach
is that "0" is obviously equivalent to "no change".

-- 
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