linux-kernel - Re: [PATCH] refcount: introduce refcount_is

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Message-ID: <20211118074200.GF174703@worktop.programming.kicks-ass.net>
Date:   Thu, 18 Nov 2021 08:42:00 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Yajun Deng <yajun.deng@...ux.dev>
Cc:     will@...nel.org, boqun.feng@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] refcount: introduce refcount_is_one() helper function

On Thu, Nov 18, 2021 at 11:53:28AM +0800, Yajun Deng wrote:
> There are many cases where it is necessary to determine if refcount is one,
> introduce refcount_is_one() helper function for these cases.

Give me one that is not racy?