linux-kernel - Re: [RFC PATCH 02/11] refcount: Implement inc/decrement-and-return functions

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Message-ID: <20170905064511.GA25102@infradead.org>
Date:   Mon, 4 Sep 2017 23:45:11 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     David Howells <dhowells@...hat.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Kees Cook <keescook@...omium.org>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-afs@...ts.infradead.org
Subject: Re: [RFC PATCH 02/11] refcount: Implement inc/decrement-and-return
 functions

On Mon, Sep 04, 2017 at 05:08:29PM +0100, David Howells wrote:
> Which bit are you objecting to?  Wanting to use a refcount_t with 1 to
> represent an otherwise-unreferenced object sat in a cache?  Or wanting to
> display accurate usage counts when tracing gets and puts of objects?

Primarily the first, but also any feature creap of the refcount_t in
general.