linux-kernel - Re: [PATCH v1 12/15] md/raid5-cache: Add RCU protection to conf->log accesses

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Message-ID: <b5fe3e26-ade6-0d1b-4b0e-e8e3f147e9ea@deltatee.com>
Date:   Tue, 24 May 2022 10:14:03 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     Song Liu <song@...nel.org>, Donald Buczek <buczek@...gen.mpg.de>
Cc:     open list <linux-kernel@...r.kernel.org>,
        linux-raid <linux-raid@...r.kernel.org>,
        Christoph Hellwig <hch@...radead.org>,
        Guoqing Jiang <guoqing.jiang@...ux.dev>,
        Xiao Ni <xni@...hat.com>, Stephen Bates <sbates@...thlin.com>,
        Martin Oliveira <Martin.Oliveira@...eticom.com>,
        David Sloan <David.Sloan@...eticom.com>
Subject: Re: [PATCH v1 12/15] md/raid5-cache: Add RCU protection to conf->log
 accesses



On 2022-05-23 12:15, Song Liu wrote:
> On Sun, May 22, 2022 at 11:47 PM Song Liu <song@...nel.org> wrote:
>> Maybe we should move the definition of r5l_log to raid5-log.h?
> 
> Or we can use READ_ONCE(conf->log) for most cases.

READ_ONCE() will still generate sparse errors.

Logan