linux-kernel - Re: [PATCH] x86/ia32: State that IA32 emulation is disabled

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Date:   Thu, 30 Nov 2023 11:42:27 -0500
From:   Brian Gerst <brgerst@...il.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
        Nikolay Borisov <nik.borisov@...e.com>
Subject: Re: [PATCH] x86/ia32: State that IA32 emulation is disabled

On Thu, Nov 30, 2023 at 11:09 AM Borislav Petkov <bp@...en8.de> wrote:
>
> On Thu, Nov 30, 2023 at 04:52:13PM +0100, Borislav Petkov wrote:
> > +static inline bool ia32_enabled_verbose(void)
> > +{
> > +#ifdef CONFIG_IA32_EMULATION
> > +     pr_notice_once("32-bit emulation disabled. You can reenable with ia32_emulation=on\n");
> > +#endif
> > +     return ia32_enabled();
> > +}
>
> As Nik rightfully points out offlist, this should rather be something
> like:
>
> ---
>         bool enabled = ia32_enabled();
>
> #ifdef CONFIG_IA32_EMULATION
>         if (!enabled)
>                 pr_notice_once("32-bit emulation disabled. You can reenable with ia32_emulation=on\n");
> #endif
>
>         return enabled;

The #ifdef isn't necessary, as ia32_enabled() will always return false
in that case.

Brian Gerst