Re: [PATCH 2/2] swiotlb-xen: override common mmap and get_sgtable dma ops

[Christoph Hellwig]

On Wed, Jun 16, 2021 at 11:39:07AM -0400, Boris Ostrovsky wrote:
> 
> On 6/16/21 11:35 AM, Christoph Hellwig wrote:
> > On Wed, Jun 16, 2021 at 11:33:50AM -0400, Boris Ostrovsky wrote:
> >> Isn't the expectation of virt_to_page() that it only works on non-vmalloc'd addresses? (This is not a rhetorical question, I actually don't know).
> > Yes.  Thus is why I'd suggest to just do the vmalloc_to_page or
> > virt_to_page dance in ops_helpers.c and just continue using that.
> 
> 
> Ah, OK, so something along the lines of what I suggested. (I thought by "helpers" you meant virt_to_page()).

Yes.  Just keeping it contained in the common code without duplicating it
into a xen-specific version.