Panic in NFS client on CURRENT

[Rick Macklem]

Lev wrote:
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>  I've hit panic in NFSv4 client on fresh CURRENT, which looks like bug
> 206634.
> 
Oops, along with commenting out the panic(), the VI_UNLOCK() needs
to be deleted/commented out.

The attached patch (not yet tested by me) should do it.
(Btw, this only applies to head/current and not stable/10 or earlier.)

rick

>  I have core saved and could provide additional information.
> 
> - --
> // Lev Serebryakov
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