Re: [PATCH] x86/AMD: Apply erratum 688 on machines without a BIOS fix

[sonofagun]

Last night attempt failed as patch does not apply to 4.8. Neither 4.8.1 
nor 4.8.4. Did you switch to 4.9? Please use 4.8 as we prefer to avoid 
rc kernels as we had casualties in the past. Do you want to add changes 
by hand?