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

[Andi Kleen <ak@xxxxxxx>]

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


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