[PATCH 00/16] expand mmap_prepare functionality, port more users

[Jason Gunthorpe]

On Mon, Sep 08, 2025 at 03:48:36PM +0100, Lorenzo Stoakes wrote:
> But sadly some _do need_ to do extra work afterwards, most notably,
> prepopulation.

I think Jan is suggesting something more like

mmap_op()
{
   struct vma_desc desc = {};

   desc.[..] = x
   desc.[..] = y
   desc.[..] = z
   vma = vma_alloc(desc);

   ret = remap_pfn(vma)
   if (ret) goto err_vma;

   return vma_commit(vma);

err_va:
  vma_dealloc(vma);
  return ERR_PTR(ret);
}

Jason