Re: [PATCH 0/6] security/keys/encrypted: Break module dependency chain

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On Tue, Mar 19, 2019 at 02:01:44PM -0700, Dan Williams wrote:
> On Mon, Mar 18, 2019 at 11:18 PM Dan Williams <dan.j.williams@xxxxxxxxx> wrote:
> >
> > With v5.1-rc1 all the nvdimm sub-system regression tests started failing
> > because the libnvdimm module failed to load in the qemu-kvm test
> > environment.  Critically that environment does not have a TPM. Commit
> > 240730437deb "KEYS: trusted: explicitly use tpm_chip structure..."
> > started to require a TPM to be present for the trusted.ko module to load
> > where there was no requirement for that before.
> >
> > Rather than undo the "fail if no hardware" behavior James points out
> > that the module dependencies can be broken by looking up the key-type by
> > name. Remove the dependencies on the "key_type_trusted" and
> > "key_type_encrypted" symbol exports, and clean up other boilerplate that
> > supported those exports in different configurations.
> 
> Any feedback? Was hoping to get at least patch1 in the queue for
> v5.1-rc2 since this effectively disables the nvdimm driver on typical
> configurations. Jarkko, would you be willing to merge it since the
> regression came through your tree?

Yes, of course. The feedback has been extremely passive because I've
been sick leave for the early week :-)

Before I'm merging this I'm just thinking that would it be better
idea to merge a patch for trusted.c that reverts the old behavior
with cc to stable and fixes tags as I said in my earlier response.

It would less intrusive for stable kernels. Lets quickly sort out
the best strategy before merging.

/Jarkko



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