Received-SPF: softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19;
Date:   Fri, 18 Feb 2022 03:29:56 +0000
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     Rik van Riel <riel@surriel.com>
Cc:     linux-kernel@vger.kernel.org, kernel-team@fb.com,
        Chris Mason <clm@fb.com>,
        "Paul E. McKenney" <paulmck@kernel.org>,
        linux-fsdevel@vger.kernel.org,
        Giuseppe Scrivano <gscrivan@redhat.com>
Subject: Re: [PATCH][RFC] ipc,fs: use rcu_work to free struct ipc_namespace
Message-ID: <Yg8StKzTWh+7FLuA@zeniv-ca.linux.org.uk>
References: <20220217153620.4607bc28@imladris.surriel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20220217153620.4607bc28@imladris.surriel.com>
Sender: Al Viro <viro@ftp.linux.org.uk>
Precedence: bulk

On Thu, Feb 17, 2022 at 03:36:20PM -0500, Rik van Riel wrote:
> The patch works, but a cleanup question for Al Viro:
> 
> How do we get rid of #include "../fs/mount.h" and the raw ->mnt_ns = NULL thing
> in the cleanest way?

Hell knows...  mnt_make_shortterm(mnt) with big, fat warning along the lines of
"YOU MUST HAVE AN RCU GRACE PERIOD BEFORE YOU DROP THAT REFERENCE!!!", perhaps?