Re: 5.7.0 / BUG: kernel NULL pointer dereference / setup_cpu_watcher

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 05/06/2020 09:36, Christian Kujau wrote:
> Hi,
>
> I'm running a small Xen PVH domain and upgrading from vanilla 5.6.0 to 
> <snip>
>
> Note: that "Xen Platform PCI: unrecognised magic value" on the top appears 
> in 5.6 kernels as well, but no ill effects so far.
>
> ---------------------------------------------------------------
> Xen Platform PCI: unrecognised magic value

PVH domains don't have the emulated platform device, so Linux will be
finding ~0 when it goes looking in config space.

The diagnostic should be skipped in that case, to avoid giving the false
impression that something is wrong.

~Andrew