Re: [PATCH 2/2] mm: adds NOSIGBUS extension for out-of-band shmem read

This series passes my "looks fine, is simple and straightforward" test.

One nit:

On Tue, Jun 1, 2021 at 1:22 PM Ming Lin [off-list ref] wrote:

+               error = vm_insert_page(vma, (unsigned long)vmf->address,
+                                       ZERO_PAGE(0));

On architectures where this matters - bad virtual caches - it would be
better to use ZERO_PAGE(vmf->address).

It doesn't make a difference on any sane architecture, but it's the
RightThing(tm) to do.

            Linus