Mike Travis wrote:
quoted text
> @@ -132,6 +133,12 @@ ident_complete:
>  #ifdef CONFIG_SMP
>  	addq	%rbp, trampoline_level4_pgt + 0(%rip)
>  	addq	%rbp, trampoline_level4_pgt + (511*8)(%rip)
> +
> +	/*
> +	 * Fix up per_cpu__gdt_page offset when basing percpu
> +	 * variables at zero.  This is only needed for the boot cpu.
> +	 */
> +	addq	$__per_cpu_load, early_gdt_descr_base
>   

This needs to be rip-relative.  An absolute reference here will fail 
because you're still running in physical addresses.

    J
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