Re: [PATCH 2/2] xen: rename wrong named pfn related variables

[Jan Beulich]

On 16.06.2021 09:30, Juergen Gross wrote:
> --- a/arch/x86/xen/p2m.c
> +++ b/arch/x86/xen/p2m.c
> @@ -95,8 +95,8 @@ unsigned long *xen_p2m_addr __read_mostly;
>  EXPORT_SYMBOL_GPL(xen_p2m_addr);
>  unsigned long xen_p2m_size __read_mostly;
>  EXPORT_SYMBOL_GPL(xen_p2m_size);
> -unsigned long xen_max_p2m_pfn __read_mostly;
> -EXPORT_SYMBOL_GPL(xen_max_p2m_pfn);
> +unsigned long xen_p2m_max_size __read_mostly;
> +EXPORT_SYMBOL_GPL(xen_p2m_max_size);

Instead of renaming the exported variable (which will break consumers
anyway), how about dropping the apparently unneeded export at this
occasion? Further it looks to me as if xen_p2m_size and this variable
were actually always kept in sync, so I'd like to put up the question
of dropping one of the two.

> @@ -121,7 +121,7 @@ static pte_t *p2m_identity_pte;
>   * can avoid scanning the whole P2M (which may be sized to account for
>   * hotplugged memory).
>   */
> -static unsigned long xen_p2m_last_pfn;
> +static unsigned long xen_p2m_pfn_limit;

As to the comment remark in patch 1: You don't alter the comment
here either, and "limit" still doesn't make clear whether that's an
inclusive or exclusive limit.

Jan