linux-kernel - Re: [BUG?] staging: zram: Add auto loading of module if user opens /dev/zram.

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Date:	Thu, 12 Sep 2013 15:43:01 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Kay Sievers <kay@...y.org>
Cc:	Tom Gundersen <teg@...m.no>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Minchan Kim <minchan@...nel.org>, devel@...verdev.osuosl.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [BUG?] staging: zram: Add auto loading of module if user opens
 /dev/zram.

On Mon, Sep 09, 2013 at 06:41:48PM +0200, Kay Sievers wrote:
> On Mon, Sep 9, 2013 at 5:58 PM, Tom Gundersen <teg@...m.no> wrote:
> > Hi Konrad,
> >
> > The above commit (c70bda9 in mainline) doesn't appear to work for me.
> > I.e., depmod does not create an entry in modules.devname and hence no
> > device node is created on boot.
> >
> > If I understand correctly, you'd also need to create the correct
> > "char-major-<MAJOR>-<MINOR>" alias. But I don't really see how this is
> > meant to work as I thought zram only created /dev/zramX type device
> > nodes, and not /dev/zram, or am I missing something?
> 
> Please just remove it. "devname" is meant to be used for
> single-instance devices with a static dev_t, never for things like
> zramX.
> 
> It will not do anything useful here, it does nothing really without a
> statically assigned dev_t, and it should not be used for devices of
> this kind anyway.

I'll revert this after 3.12-rc1 is out, thanks,

greg k-h
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