[PATCH] xen: fix scrub_page()

[Ingo Molnar]

* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:

>> Secondly, we actually have a function called "clear_highpage()" 
>> that does this, except it uses kmap_atomic(page, KM_USER0). Which 
>> is _probably better anyway, but I didn't check if there is some 
>> magical reason why it wouldn't work.
>
> OK.

applied it with the changelog below to tip/x86/urgent, thanks guys! 

AFAICS CONFIG_XEN_SCRUB_PAGES=y could not possibly have worked before 
(kunmapping the wrong address is a crasher), so there's little 
practical risk from using an atomic kmap here.

	Ingo

-------------->