r356776 breaks kernel for powerpc64 users

[Piotr Kubaj]

Hi,

revision 356776 breaks booting for powerpc64 users. It reportedly works fine on POWER8, but I get kernel panic on POWER9 (Talos II) right after the usual warning: WITNESS enabled. Kernel panic is uploaded to https://pastebin.com/s8ZaUNS2.

@jeff
Since you commited this patch, can you fix this issue or revert this commit?


Thanks,
Piotr Kubaj.
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