Re: [PATCH 2/8] drm/shmem: switch shmem helper to &drm_gem_object_funcs.mmap

[Gerd Hoffmann]

  Hi,

> > -	/* VM_PFNMAP was set by drm_gem_mmap() */
> > -	vma->vm_flags &= ~VM_PFNMAP;
> > -	vma->vm_flags |= VM_MIXEDMAP;
> > +	vma->vm_flags |= (VM_MIXEDMAP|VM_DONTEXPAND);
> 
> I'm finding this a bit hard to follow - but I think here we've lost
> VM_IO and VM_DONTDUMP which used to be set by drm_gem_mmap().

Yep.  Intentional, but I think I better split that off to a separate
patch with a commit message explaining things.

> Also it looks like nothing is fiddling vma->vm_page_prot anymore.

Oops, that one was not intentional.  Will fix.

cheers,
  Gerd