linux-kernel - Re: [PATCH v2] x86/cpu: drop unused Kconfig symbol X86_P6

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Message-ID: <e4575fc9-bdfc-44ac-98ca-c0fe600d3cde@zytor.com>
Date: Tue, 6 Jan 2026 19:50:15 -0800
From: "H. Peter Anvin" <hpa@...or.com>
To: Randy Dunlap <rdunlap@...radead.org>, linux-kernel@...r.kernel.org
Cc: Nikolay Borisov <nik.borisov@...e.com>, Arnd Bergmann <arnd@...db.de>,
        Ingo Molnar <mingo@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org
Subject: Re: [PATCH v2] x86/cpu: drop unused Kconfig symbol X86_P6_NOP

On 2026-01-05 17:47, Randy Dunlap wrote:
> This symbol was removed in early 2025 but 2 dangling references to it
> were missed. Delete them now.
> 
> It's safe to drop the -mtune=generic32 option since gcc 4.3 doesn't
> cause the problem (see 28f7e66fc1da ("x86: prevent binutils from being
> "smart" and generating NOPLs for us")). Also, Arnd confirmed this with
> gcc-8 and gcc-15.
> 
> Fixes: f388f60ca904 ("x86/cpu: Drop configuration options for early 64-bit CPUs")
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Reviewed-by: Nikolay Borisov <nik.borisov@...e.com>
> ---
> v2: add Reviewed-by Nikolay; add -mtune explanation (Dave, Arnd: thanks);
>     add Cc to HPA;
> 
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: Ingo Molnar <mingo@...nel.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Borislav Petkov <bp@...en8.de>
> Cc: Dave Hansen <dave.hansen@...ux.intel.com>
> Cc: "H. Peter Anvin" <hpa@...or.com>
> Cc: x86@...nel.org
>

Acked-by: H. Peter Anvin (Intel) <hpa@...or.com>

	-hpa