linux-kernel - RE: [PATCH net] hyperv: Fix a compiler warning in netvsc

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Message-ID: <b7c7793f69d845e38825899a1500d47e@DFM-DB3MBX15-06.exchange.corp.microsoft.com>
Date:	Tue, 16 Apr 2013 20:45:12 +0000
From:	Haiyang Zhang <haiyangz@...rosoft.com>
To:	Joe Perches <joe@...ches.com>
CC:	David Miller <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	KY Srinivasan <kys@...rosoft.com>,
	"olaf@...fle.de" <olaf@...fle.de>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>
Subject: RE: [PATCH net] hyperv: Fix a compiler warning in netvsc_send()

> -----Original Message-----
> From: Joe Perches [mailto:joe@...ches.com]
> Sent: Tuesday, April 16, 2013 4:31 PM
> To: Haiyang Zhang
> Cc: David Miller; netdev@...r.kernel.org; KY Srinivasan; olaf@...fle.de;
> jasowang@...hat.com; linux-kernel@...r.kernel.org;
> devel@...uxdriverproject.org
> Subject: Re: [PATCH net] hyperv: Fix a compiler warning in netvsc_send()
> 
> On Tue, 2013-04-16 at 20:18 +0000, Haiyang Zhang wrote:
> > > From: David Miller [mailto:davem@...emloft.net] It works fine, but
> > > it's unclean.
> > > Keep the req_id type as "u64", because that's what it is, a 64-bit request
> ID.
> > I will make this update and submit a new patch, with the added comments.
> 
> Do you mean you'll use this to avoid compiler warnings?
> 
> 	req_id = (u64)(unsigned long)packet;

I will use:
req_id = (ulong)packet;

Assigning 32 bit integer to 64 bit variable is fine.

Thanks,
- Haiyang
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