On 11/11/14 05:43, Juergen Gross wrote:
> The m2p overrides are used to be able to find the local pfn for a
> foreign mfn mapped into the domain. They are used by driver backends
> having to access frontend data.
>
> As this functionality isn't used in early boot it makes no sense to
> initialize the m2p override functions very early. It can be done
> later without doing any harm, removing the need for allocating memory
> via extend_brk().
>
> While at it make some m2p override functions static as they are only
> used internally.
Reviewed-by: David Vrabel <david.vra...@citrix.com>
But...
> static struct page *m2p_find_override(unsigned long mfn)
> {
> unsigned long flags;
> - struct list_head *bucket = &m2p_overrides[mfn_hash(mfn)];
> + struct list_head *bucket;
> struct page *p, *ret;
if (unlikely(!m2p_overrides))
return NULL;
Would be preferred,
David
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