linux-kernel - Re: [PATCH 15/15] x86/atomics: Remove !CONFIG_X86

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Message-Id: <39e5a78e-6079-4469-95b8-71cc9e756259@app.fastmail.com>
Date: Fri, 25 Apr 2025 15:55:21 +0200
From: "Arnd Bergmann" <arnd@...nel.org>
To: "Ingo Molnar" <mingo@...nel.org>, linux-kernel@...r.kernel.org
Cc: "Ahmed S . Darwish" <darwi@...utronix.de>,
 "Andrew Cooper" <andrew.cooper3@...rix.com>,
 "Ard Biesheuvel" <ardb@...nel.org>, "Borislav Petkov" <bp@...en8.de>,
 "Dave Hansen" <dave.hansen@...ux.intel.com>,
 "H. Peter Anvin" <hpa@...or.com>, "John Ogness" <john.ogness@...utronix.de>,
 "Linus Torvalds" <torvalds@...ux-foundation.org>,
 "Peter Zijlstra" <peterz@...radead.org>,
 "Thomas Gleixner" <tglx@...utronix.de>
Subject: Re: [PATCH 15/15] x86/atomics: Remove !CONFIG_X86_CX8 methods

On Fri, Apr 25, 2025, at 10:42, Ingo Molnar wrote:

> +#define arch_cmpxchg64			__cmpxchg64
> +#define arch_cmpxchg64_local		__cmpxchg64_local
> +#define arch_try_cmpxchg64		__try_cmpxchg64
> +#define arch_try_cmpxchg64_local	__try_cmpxchg64_local
> 
>  #define system_has_cmpxchg64()		boot_cpu_has(X86_FEATURE_CX8)

system_has_cmpxchg64() should now become a constant.

     Arnd