From: Joey Gouly <joey.gouly@arm.com>
To: Ard Biesheuvel <ardb+git@google.com>
Cc: linux-hardening@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Ard Biesheuvel <ardb@kernel.org>,
Kees Cook <kees@kernel.org>, Ryan Roberts <ryan.roberts@arm.com>,
Will Deacon <will@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Jeremy Linton <jeremy.linton@arm.com>,
Catalin Marinas <Catalin.Marinas@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
"Jason A. Donenfeld" <Jason@zx2c4.com>
Subject: Re: [RFC/RFT PATCH 2/6] arc: Wire up cmpxchg64_local() to generic implementation
Date: Thu, 27 Nov 2025 15:06:14 +0000 [thread overview]
Message-ID: <20251127150614.GA3271003@e124191.cambridge.arm.com> (raw)
In-Reply-To: <20251127092226.1439196-10-ardb+git@google.com>
On Thu, Nov 27, 2025 at 10:22:29AM +0100, Ard Biesheuvel wrote:
> From: Ard Biesheuvel <ardb@kernel.org>
>
> Provide cmpxchg64_local() for hexagon so we can start using it in
> generic code.
nit: this is for arc, not hexagon.
Thanks,
Joey
>
> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
> ---
> arch/arc/include/asm/cmpxchg.h | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/arc/include/asm/cmpxchg.h b/arch/arc/include/asm/cmpxchg.h
> index 76f43db0890f..f2d55823645c 100644
> --- a/arch/arc/include/asm/cmpxchg.h
> +++ b/arch/arc/include/asm/cmpxchg.h
> @@ -12,6 +12,7 @@
>
> #include <asm/barrier.h>
> #include <asm/smp.h>
> +#include <asm-generic/cmpxchg-local.h>
>
> #ifdef CONFIG_ARC_HAS_LLSC
>
> @@ -142,4 +143,6 @@
>
> #endif
>
> +#define arch_cmpxchg64_local __generic_cmpxchg64_local
> +
> #endif
> --
> 2.52.0.107.ga0afd4fd5b-goog
>
>
next prev parent reply other threads:[~2025-11-27 15:06 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-27 9:22 [RFC/RFT PATCH 0/6] Improve get_random_u8() for use in randomize kstack Ard Biesheuvel
2025-11-27 9:22 ` [RFC/RFT PATCH 1/6] hexagon: Wire up cmpxchg64_local() to generic implementation Ard Biesheuvel
2025-11-27 9:22 ` [RFC/RFT PATCH 2/6] arc: " Ard Biesheuvel
2025-11-27 15:06 ` Joey Gouly [this message]
2025-12-03 16:59 ` Ard Biesheuvel
2025-11-27 9:22 ` [RFC/RFT PATCH 3/6] random: Use u32 to keep track of batched entropy generation Ard Biesheuvel
2025-11-27 10:11 ` david laight
2025-11-27 10:15 ` Ard Biesheuvel
2025-11-27 9:22 ` [RFC/RFT PATCH 4/6] random: Use a lockless fast path for get_random_uXX() Ard Biesheuvel
2025-11-27 10:32 ` Ard Biesheuvel
2025-11-27 9:22 ` [RFC/RFT PATCH 5/6] random: Plug race in preceding patch Ard Biesheuvel
2025-11-28 11:13 ` david laight
2025-11-28 11:18 ` Ard Biesheuvel
2025-11-27 9:22 ` [RFC/RFT PATCH 6/6] randomize_kstack: Use get_random_u8() at entry for entropy Ard Biesheuvel
2025-11-27 12:12 ` [RFC/RFT PATCH 0/6] Improve get_random_u8() for use in randomize kstack Ryan Roberts
2025-11-27 12:28 ` Ard Biesheuvel
2025-11-27 13:08 ` Ryan Roberts
2025-11-27 14:18 ` Ryan Roberts
2025-11-27 15:03 ` Ard Biesheuvel
2025-11-27 15:40 ` Ard Biesheuvel
2025-11-27 15:56 ` Ryan Roberts
2025-11-27 16:58 ` Mark Rutland
2025-11-27 19:01 ` Ard Biesheuvel
2025-11-28 10:36 ` Ryan Roberts
2025-11-28 11:44 ` Mark Rutland
2025-11-28 10:07 ` Ard Biesheuvel
2025-11-28 10:32 ` Ryan Roberts
2025-11-28 10:36 ` Ard Biesheuvel
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