Re: [PATCH] x86/kconfig/32: Make CONFIG_VM86 default to n and remove EXPERT

[Arjan van de Ven]

On 7/9/2015 11:40 AM, Andy Lutomirski wrote:
> VM86 is entirely broken if ptrace, syscall auditing, or NOHZ_FULL is
> in use.  The code is a big undocumented mess, it's a real PITA to
> test, and it looks like a big chunk of vm86_32.c is dead code.  It
> also plays awful games with the entry asm.
>
> No one should be using it anyway.  Use DOSBOX or KVM instead.
>
> Let's accelerate its slow death.  Remove it from EXPERT and default
> it to n.  Distros should not enable it.  In the unlikely event that
> some user needs it, they can easily re-enable it.
>
> I've confirmed that 'make oldconfig' will set leave it set to y, so
> there should be little or no unexpected breakage from this change.

I would rather do BOTH the default n AND the EXPERT

e.g. the existing hurdle of EXPERT combined with the default
(e.g. off entirely in non-EXPERT, and with EXPERT it is sill defaulting to =n)


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