linux-kernel - Re: [PATCH 22/59] Staging: hv: vmbus: Get rid of the unused name field in struct hv

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Message-ID: <20110825212820.GA6770@kroah.com>
Date:	Thu, 25 Aug 2011 14:28:20 -0700
From:	Greg KH <greg@...ah.com>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>
Cc:	gregkh@...e.de, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, virtualization@...ts.osdl.org,
	Haiyang Zhang <haiyangz@...rosoft.com>
Subject: Re: [PATCH 22/59] Staging: hv: vmbus: Get rid of the unused name
 field in struct hv_driver

On Thu, Aug 25, 2011 at 02:24:28PM -0700, Greg KH wrote:
> On Thu, Aug 25, 2011 at 09:48:48AM -0700, K. Y. Srinivasan wrote:
> > Get rid of the unused "name" field in struct hv_driver.
> > 
> > Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
> > Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
> > ---
> >  drivers/staging/hv/hyperv.h |    2 --
> >  1 files changed, 0 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/staging/hv/hyperv.h b/drivers/staging/hv/hyperv.h
> > index b8199f4..60ead66 100644
> > --- a/drivers/staging/hv/hyperv.h
> > +++ b/drivers/staging/hv/hyperv.h
> > @@ -802,8 +802,6 @@ struct hv_device_info {
> >  
> >  /* Base driver object */
> >  struct hv_driver {
> > -	const char *name;
> 
> Wait, why is this unused?  What are you going to use as your name for
> the driver in sysfs then?  The module name?
> 
> As much as I love seeing things deleted, I really think you need this
> field.
> 
> Ah, yeah, I see why you think it's unneeded, crud like this in the
> drivers:
> 
> 	drv->driver.name = driver_name;
> 
> No vmbus driver should ever have to touch the base struct driver on it's
> own at all.  Your vmbus core should properly handle telling the driver
> core what the name of the driver is.
> 
> As an example, see the __pci_register_driver() function, the first thing
> that code does is set the name based on the name of the larger
> pci_driver structure passed to it.
> 
> Man, if you want something done right, you have to do it yourself, let
> me go make these changes so you don't have to do any new work at this
> point in time, hopefully your other patches will apply...

What, vmbus_child_driver_register() takes a struct driver *?

No wonder things are so messed up here, and why you got confused.  Let
me pound on this for a bit to see if I can get it cleaned up to be more
"sane"...

greg k-h
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