linux-kernel - RE: [PATCH 019/117] Staging: hv: vmbus: Cleanup vmbus

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Date:	Wed, 24 Aug 2011 00:38:09 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	Greg KH <greg@...ah.com>
CC:	"gregkh@...e.de" <gregkh@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"virtualization@...ts.osdl.org" <virtualization@...ts.osdl.org>,
	Haiyang Zhang <haiyangz@...rosoft.com>
Subject: RE: [PATCH 019/117] Staging: hv: vmbus: Cleanup vmbus_uevent() code



> -----Original Message-----
> From: Greg KH [mailto:greg@...ah.com]
> Sent: Tuesday, August 23, 2011 6:50 PM
> To: KY Srinivasan
> Cc: gregkh@...e.de; linux-kernel@...r.kernel.org;
> devel@...uxdriverproject.org; virtualization@...ts.osdl.org; Haiyang Zhang
> Subject: Re: [PATCH 019/117] Staging: hv: vmbus: Cleanup vmbus_uevent() code
> 
> On Fri, Jul 15, 2011 at 10:46:07AM -0700, K. Y. Srinivasan wrote:
> > Now generate appropriate uevent based on the modalias string. As part of this,
> > cleanup the existing uevent code.
> 
> Note, you just change the user api here, did you have tools that relied
> on the old format?  If so, they just broke :(

Prior to this, I don't think autoloading worked the way it should for these
modules. 

> 
> > +	for (i = 0; i < (sizeof(struct hv_vmbus_device_id) * 2); i += 2)
> > +		sprintf(&alias_name[i], "%02x", dev->dev_type.b[i/2]);
> 
> Don't we have a type for printing out a uuid already?

I did not see one; could you point me to the right place.
> 
> And what's with the jumping by 2 yet dividing?  What am I missing here?

Each byte of the uuid is represented by 2 bytes in the string; thus the magic with 2.

Regards,

K. Y

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