linux-kernel - Re: [PATCH] init: Initialize noop_backing_dev

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Date:   Thu, 16 Jun 2022 11:00:52 +0200
From:   Jan Kara <jack@...e.cz>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Jan Kara <jack@...e.cz>, LKML <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-mm@...ck.org, Suzuki K Poulose <suzuki.poulose@....com>,
        Guenter Roeck <linux@...ck-us.net>,
        Alexandru Elisei <alexandru.elisei@....com>
Subject: Re: [PATCH] init: Initialize noop_backing_dev_info early

On Wed 15-06-22 23:08:22, Christoph Hellwig wrote:
> On Wed, Jun 15, 2022 at 11:48:15PM +0200, Jan Kara wrote:
> > +extern int bdi_init(struct backing_dev_info *bdi);
> 
> No need for the extern.

Yes, fixed up.

> Otherwise looks good:
> 
> Reviewed-by: Christoph Hellwig <hch@....de>

Thanks for review!

> And this remind me that I really want to kill noop_backing_dev_info
> and just use a NULL bdi for this case eventually..

Yes, I'm just not sure whether the checks for bdi / wb being NULL in lots
of places will not be too annoying... But maybe you'll be able to come up
with some wrappers that will make things bearable.

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR