linux-kernel - Re: [PATCH v7 1/4] kernfs: make ->attr.open RCU protected.

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Message-ID: <Yql4aerFAHyp7ymB@slm.duckdns.org>
Date:   Tue, 14 Jun 2022 20:12:57 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Imran Khan <imran.f.khan@...cle.com>
Cc:     gregkh@...uxfoundation.org, viro@...iv.linux.org.uk,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 1/4] kernfs: make ->attr.open RCU protected.

On Wed, Jun 15, 2022 at 12:10:56PM +1000, Imran Khan wrote:
> After removal of kernfs_open_node->refcnt in the previous patch,
> kernfs_open_node_lock can be removed as well by making ->attr.open
> RCU protected. kernfs_put_open_node can delegate freeing to ->attr.open
> to RCU and other readers of ->attr.open can do so under rcu_read_(un)lock.
> 
> Suggested by: Al Viro <viro@...iv.linux.org.uk>
> Signed-off-by: Imran Khan <imran.f.khan@...cle.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun