Re: [PATCH 3/3] x86: Disable running 32bit processes if ia32_disabled is passed

[Thomas Gleixner]

On Wed, Jun 07 2023 at 14:01, Thomas Gleixner wrote:
> On Wed, Jun 07 2023 at 10:29, Nikolay Borisov wrote:
>> @@ -2368,4 +2373,7 @@ void arch_smt_update(void)
>>  	cpu_bugs_smt_update();
>>  	/* Check whether IPI broadcasting can be enabled */
>>  	apic_smt_update();
>> +	if (ia32_disabled)
>> +		on_each_cpu(remove_user32cs_from_gdt, NULL, 1);

My brain based compiler tells me, that this breaks the 32bit build and
the 64bit build with CONFIG_IA32_EMULATION=n. I'm pretty confident that
a real compiler will agree.