linux-kernel - Re: [PATCH v2 00/12] gendisk: Generate uevent after attribute available

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Message-ID: <20160701010113.GB10122@ad.usersys.redhat.com>
Date:	Fri, 1 Jul 2016 09:01:13 +0800
From:	Fam Zheng <famz@...hat.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	linux-kernel@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Jens Axboe <axboe@...nel.dk>,
	"Ed L. Cashin" <ed.cashin@....org>, Jiri Kosina <jikos@...nel.org>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Minchan Kim <minchan@...nel.org>,
	Nitin Gupta <ngupta@...are.org>,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Shaohua Li <shli@...nel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	Keith Busch <keith.busch@...el.com>,
	linuxppc-dev@...ts.ozlabs.org, linux-block@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	linux-raid@...r.kernel.org, linux-mmc@...r.kernel.org,
	linux-mtd@...ts.infradead.org, linux-nvme@...ts.infradead.org,
	dan.j.williams@...el.com, famz@...hat.com
Subject: Re: [PATCH v2 00/12] gendisk: Generate uevent after attribute
 available

On Wed, 06/29 23:38, Christoph Hellwig wrote:
> On Thu, Jun 30, 2016 at 02:35:54PM +0800, Fam Zheng wrote:
> > also more code and less flexible IMO.  For example, we need at least two
> > variants, for attribute_group and device_attribute separately, right?
> 
> Yes, or maybe just a calling convention that just passes both.

OK, I can look into that, but I'm not sure about the error handling. Currently
add_disk returns void, do you have any plan on that too? should I change it in
v3 (to at least return the attribute creation failure)?

Fam