linux-kernel - Re: [PATCH] drivers: base: add cpu_device

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Date:	Tue, 2 Sep 2014 10:26:32 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Sudeep Holla <sudeep.holla@....com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	David Herrmann <dh.herrmann@...il.com>,
	Kay Sievers <kay@...y.org>
Subject: Re: [PATCH] drivers: base: add cpu_device_create to support per-cpu
 devices

On Tue, Sep 02, 2014 at 06:22:07PM +0100, Sudeep Holla wrote:
> Hi Greg,
> 
> On 22/08/14 12:29, Sudeep Holla wrote:
> >From: Sudeep Holla <sudeep.holla@....com>
> >
> >This patch adds a new function to create per-cpu devices.
> >This helps in:
> >1. reusing the device infrastructure to create any cpu related
> >    attributes and corresponding sysfs instead of creating and
> >    dealing with raw kobjects directly
> >2. retaining the legacy path(/sys/devices/system/cpu/..) to support
> >    existing sysfs ABI
> >3. avoiding to create links in the bus directory pointing to the
> >    device as there would be per-cpu instance of these devices with
> >    the same name since dev->bus is not populated to cpu_sysbus on
> >    purpose
> >
> >Signed-off-by: Sudeep Holla <sudeep.holla@....com>
> >Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> >---
> >  drivers/base/cpu.c  | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++++
> >  include/linux/cpu.h |  4 ++++
> >  2 files changed, 58 insertions(+)
> >
> >Hi Greg,
> >
> >Here is the alternate solution I could come up with instead of
> >creating cpu class. cpu_device_create is very similar to
> >device_create_groups_vargs w/o class support, but I could not
> >reuse anything else to avoid creating similar function.
> >
> >Let me know your thoughts/suggestions on this.
> >
> 
> Any feedback on this ? If ok, I will respin cacheinfo series removing
> cpu class creation with this patch.

Please address the issues others have already raised.
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