linux-kernel - Re: [PATCH 30/31] driver/base: implement subsys_virtual

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20130302181727.GB2051@kroah.com>
Date:	Sat, 2 Mar 2013 10:17:27 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	linux-kernel@...r.kernel.org, laijs@...fujitsu.com,
	axboe@...nel.dk, jmoyer@...hat.com, zab@...hat.com,
	Kay Sievers <kay.sievers@...y.org>
Subject: Re: [PATCH 30/31] driver/base: implement subsys_virtual_register()

On Fri, Mar 01, 2013 at 07:24:21PM -0800, Tejun Heo wrote:
> Kay tells me the most appropriate place to expose workqueues to
> userland would be /sys/devices/virtual/workqueues/WQ_NAME which is
> symlinked to /sys/bus/workqueue/devices/WQ_NAME and that we're lacking
> a way to do that outside of driver core as virtual_device_parent()
> isn't exported and there's no inteface to conveniently create a
> virtual subsystem.

I'm almost afraid to ask what you want to export to userspace for a
workqueue that userspace would care about...

If you create a subsystem, the devices will show up under the virtual
"bus" if you don't give them a parent, so this patch shouldn't be
needed, unless you are abusing the driver model.  What am I missing
here?

thanks,

greg k-h
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/