linux-kernel - Re: Do we still care about compilers without __seg_fs and __seg

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Message-ID: <dc0ad49a-7251-4109-9d0b-15cf667eecf5@zytor.com>
Date: Fri, 19 Dec 2025 16:43:38 -0800
From: "H. Peter Anvin" <hpa@...or.com>
To: Nathan Chancellor <nathan@...nel.org>
Cc: Uros Bizjak <ubizjak@...il.com>,
        Nick Desaulniers <nick.desaulniers+lkml@...il.com>,
        Bill Wendling <morbo@...gle.com>,
        Justin Stitt <justinstitt@...gle.com>,
        "x86@...nel.org" <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Do we still care about compilers without __seg_fs and __seg_gs
 support??

On 2025-12-19 16:24, Nathan Chancellor wrote:
> 
> Trying to use __seg_fs or __seg_gs in certain cases crashes the X86
> backend.
> 
>   https://github.com/llvm/llvm-project/issues/93449
> 
> Is there anyone on AMD or Intel's LLVM teams that could look into
> solving that? Nick pinged a couple of Intel's folks but it does not look
> 

I don't know. As you know... things have been a bit crazy around these parts
lately.

	-hpa