linux-kernel - Re: [PATCH v3 3/6] block: refactor sysfs code

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Date:   Thu, 24 Jun 2021 07:12:47 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     Matteo Croce <mcroce@...ux.microsoft.com>
Cc:     Christoph Hellwig <hch@...radead.org>, linux-block@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Lennart Poettering <lennart@...ttering.net>,
        Luca Boccassi <bluca@...ian.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Damien Le Moal <damien.lemoal@....com>,
        Tejun Heo <tj@...nel.org>,
        Javier Gonz??lez <javier@...igon.com>,
        Niklas Cassel <niklas.cassel@....com>,
        Johannes Thumshirn <johannes.thumshirn@....com>,
        Hannes Reinecke <hare@...e.de>,
        Matthew Wilcox <willy@...radead.org>,
        JeffleXu <jefflexu@...ux.alibaba.com>
Subject: Re: [PATCH v3 3/6] block: refactor sysfs code

On Wed, Jun 23, 2021 at 09:03:40PM +0200, Matteo Croce wrote:
> On Wed, Jun 23, 2021 at 1:53 PM Christoph Hellwig <hch@...radead.org> wrote:
> >
> > > -static void disk_add_events(struct gendisk *disk)
> > > +static void disk_add_sysfs(struct gendisk *disk)
> > >  {
> > >       /* FIXME: error handling */
> > > -     if (sysfs_create_files(&disk_to_dev(disk)->kobj, disk_events_attrs) < 0)
> > > +     if (sysfs_create_files(&disk_to_dev(disk)->kobj, disk_sysfs_attrs) < 0)
> > >               pr_warn("%s: failed to create sysfs files for events\n",
> > >                       disk->disk_name);
> > > +}
> >
> > Actually, what we need here is a way how we can setup the ->groups
> > field of the device to include all attribute groups instead of having
> > to call sysfs_create_files at all.
> 
> I don't get this one. You mean in general or in this series?

In general before we make more use of the block device provided attrs.