On Fri, Aug 31, 2007 at 04:26:50AM +0100, Hugh Dickins wrote:
quoted text
> --- 2.6.23-rc4/init/main.c
> +++ linux/init/main.c
> @@ -397,10 +397,6 @@ static void __init smp_init(void)
>  {
>  	unsigned int cpu;
>  
> -#ifndef CONFIG_HOTPLUG_CPU
> -	cpu_possible_map = cpu_present_map;
> -#endif
> -
>  	/* FIXME: This should be done in userspace --RR */
>  	for_each_present_cpu(cpu) {
>  		if (num_online_cpus() >= max_cpus)
> @@ -545,10 +541,6 @@ asmlinkage void __init start_kernel(void
>  	setup_arch(&command_line);
>  	setup_command_line(command_line);
>  	unwind_setup();
> -#ifndef CONFIG_HOTPLUG_CPU
> -	if (max_cpus < 2)
> -		cpu_possible_map = cpu_online_map;
> -#endif
>  	setup_per_cpu_areas();
>  	smp_prepare_boot_cpu();	/* arch-specific boot-cpu hooks */
>  

Works here, I'll try on another box soon.

-
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