Re: [PATCH] x86/boot: clear rsdp address in boot_params for broken loaders

[H. Peter Anvin]

On 12/3/18 9:32 PM, Juergen Gross wrote:
> 
> I'd like to send a followup patch doing that. And I'd like to not only
> test sentinel for being non-zero, but all padding fields as well. This
> should be 4.21 material, though.
> 

No, you can't do that.  That breaks backwards compatibility.

        -hpa