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

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Message-ID: <CAMzpN2jNPxAF75iuNwNjz7PqYygYgLeCM77rQV2ZCj=o6-qJDQ@mail.gmail.com>
Date: Fri, 25 Apr 2025 11:00:26 -0400
From: Brian Gerst <brgerst@...il.com>
To: Uros Bizjak <ubizjak@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org, 
	"Ahmed S . Darwish" <darwi@...utronix.de>, Andrew Cooper <andrew.cooper3@...rix.com>, 
	Ard Biesheuvel <ardb@...nel.org>, Arnd Bergmann <arnd@...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 10:30 AM Uros Bizjak <ubizjak@...il.com> wrote:
>
>
>
> On 25. 04. 25 10:42, Ingo Molnar wrote:
>
> > -#endif
> > +#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)
>
> #define system_has_cmpxchg64()          1

Or just outright removed, since x86 was the only arch that defined it.


Brian Gerst