remove set_fs for riscv v2

[Palmer Dabbelt]

On Tue, 08 Sep 2020 23:55:15 PDT (-0700), Christoph Hellwig wrote:
> On Tue, Sep 08, 2020 at 09:59:29PM -0700, Palmer Dabbelt wrote:
>>>
>>> The first four patches are general improvements and enablement for all nommu
>>> ports, and might make sense to merge through the above base branch.
>>
>> Seems like it to me.  These won't work without the SET_FS code so I'm OK if you
>> guys want to keep them all together.  Otherwise I think I'd need to wait until
>> the SET_FS stuff gets merged before taking any of these, which would be a bit
>> of a headache.
>
> now that we've sorted out a remaining issue base.set_fs should not
> be rebased any more, so you could pull it into the riscv tree or a topic
> branch.
>
> The first four patch should go into base.set_fs, though.  Arnd, can you
> re-review the updated patches?

OK, assuming the first four land through vfs I'll take the rest through my
tree.  I wasn't sure it was OK to merge another subtree into my tree, as IIRC I
got told not to do something like that before, but I'll go figure out a sane
way to handle it.

Thanks!