>>> On 12.12.17 at 17:32, <george.dun...@citrix.com> wrote:
>> @@ -82,7 +153,7 @@ struct page_info
>>              unsigned long type:5;   /* What kind of shadow is this? */
>>              unsigned long pinned:1; /* Is the shadow pinned? */
>>              unsigned long head:1;   /* Is this the first page of the 
>> shadow? */
>> -#define PAGE_SH_REFCOUNT_WIDTH 25
>> +#define PAGE_SH_REFCOUNT_WIDTH (PGT_count_width - 7)
>>              unsigned long count:PAGE_SH_REFCOUNT_WIDTH; /* Reference count 
>> */
>>          } sh;

It is this use of PGT_count_width ...

> What's the point of moving this code?  And are there any important changes?

... which requires the move. I thought that would be clear enough.

> It would be a lot easier to review if you separated code motion from
> code changes; but if you don't want to do that, you need to make it
> clear what you're doing in your changelog.

I've added

"Note that the first and last hunks of the xen/include/asm-x86/mm.h
 change are merely code motion."

to the description; I don't think separating out that change would
make review any easier (you either trust the code-motion-only
statement, or you want to compare both blocks, regardless of
whether this was a separate patch).

Jan


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