Re: having problems with remap_page_range() and virt_to_phys()

[Chris Friesen <cfriesen@nortelnetworks.com>]

Hugh Dickins wrote:

> And no, remembering your earlier pleas, the MM system doesn't clean
> up for you, you'll need to ClearPageReserved and free the page when
> it's all done with (if ever).


Cleanup will be at process death, so I'm adding a routine to be called from 
do_exit().

As part of that cleanup, do I need to call do_munmap() on the user virtual 
address first, or can I just do

	ClearPageReserved(pg);
	__free_pages(pg,0);

and then rely on the mm takedown to properly unmap and drop its references?

Basically I'm not sure if I can clear the reservation and free the page while 
it's still mapped in the task's memory map.

Chris