On 02/08/16 15:06, Paulina Szubarczyk wrote:
> 
> +/**
> + * Copy memory from or to grant references. The information of each 
> operations
> + * are contained in 'xengnttab_grant_copy_segment_t'. The @flag value 
> indicate
> + * the direction of an operation (GNTCOPY_source_gref\GNTCOPY_dest_gref).
> + *
> + * The sum of fields @offset[i] and @len[i] of 
> 'xengnttab_grant_copy_segment_t'
> + * should not exceed XEN_PAGE_SIZE

"For each segment, @virt may cross a page boundary but @offset + @len
must be less than XEN_PAGE_SIZE."  might be better.

With or without the above change:

Reviewed-by: David Vrabel <david.vra...@citrix.com>

David


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