Re: [RFC PATCH 32/35] Add Xen driver utility functions.

Andi Kleen
2006-03-22T15:03:57Z

On Wednesday 22 March 2006 07:31, Chris Wright wrote:

> + /*
> + * Ensure that the page tables are mapped into the current mm. The
> + * page-fault path will copy the page directory pointers from init_mm.
> + */
> + for (i = 0; i < area->size; i += PAGE_SIZE)
> + (void)__get_user(c, (char __user *)area->addr + i);

It would be easier and simpler to just copy the pgd manually.

Iirc Jan B. had a patch for a vmalloc_sync() function for this purpose, maybe
that one could be used.

-Andi