linux-kernel - Re: [PATCH] riscv: atomic: Using ARCH

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Message-ID: <YHf+z0AotZmjvaJ/@hirez.programming.kicks-ass.net>
Date:   Thu, 15 Apr 2021 10:52:31 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     guoren@...nel.org
Cc:     Anup.Patel@....com, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-csky@...r.kernel.org,
        linux-arch@...r.kernel.org, Guo Ren <guoren@...ux.alibaba.com>,
        Arnd Bergmann <arnd@...db.de>,
        Anup Patel <anup@...infault.org>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>
Subject: Re: [PATCH] riscv: atomic: Using ARCH_ATOMIC in asm/atomic.h

On Thu, Apr 15, 2021 at 07:39:22AM +0000, guoren@...nel.org wrote:
>  - Add atomic_andnot_* operation

> @@ -76,6 +59,12 @@ ATOMIC_OPS(sub, add, -i)
>  ATOMIC_OPS(and, and,  i)
>  ATOMIC_OPS( or,  or,  i)
>  ATOMIC_OPS(xor, xor,  i)
> +ATOMIC_OPS(andnot, and,  -i)

~i, surely.