netdev - RE: [PATCH net-next] hyperv: Fix a compiler warning in netvsc

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Message-ID: <2bef79e083dd4b14adc5e6d3549f8a05@DFM-DB3MBX15-06.exchange.corp.microsoft.com>
Date:	Mon, 29 Apr 2013 18:30:53 +0000
From:	Haiyang Zhang <haiyangz@...rosoft.com>
To:	David Miller <davem@...emloft.net>
CC:	"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-next] hyperv: Fix a compiler warning in netvsc_send()



> -----Original Message-----
> From: David Miller [mailto:davem@...emloft.net]
> Sent: Monday, April 29, 2013 2:10 PM
> To: Haiyang Zhang
> Cc: netdev@...r.kernel.org; KY Srinivasan; olaf@...fle.de;
> jasowang@...hat.com; linux-kernel@...r.kernel.org;
> devel@...uxdriverproject.org
> Subject: Re: [PATCH net-next] hyperv: Fix a compiler warning in
> netvsc_send()
> 
> From: Haiyang Zhang <haiyangz@...rosoft.com>
> Date: Fri, 26 Apr 2013 11:25:55 -0700
> 
> > Fixed: warning: cast from pointer to integer of different size
> >
> > The Hyper-V hosts always use 64 bit request id. The guests can have 32
> > or 64 bit pointers which equal to the ulong type size. So we cast it to ulong
> type.
> > And, assigning 32bit integer to 64 bit variable works fine.
> >
> > The VMBus returns the same id in the completion packet. But the value
> > has no effect on the host side.
> >
> > Reported-by: kbuild test robot <fengguang.wu@...el.com>
> > Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
> > Reviewed-by: K. Y. Srinivasan <kys@...rosoft.com>
> 
> Applied, but:
> 
> > -		req_id = (u64)packet;
> > +		req_id = (ulong)packet;
> 
> I really do not like these shorthands for fundamental C types, we generally
> do not use "ulong", "uint" etc.  Please expand them out explicitly to
> "unsigned long", "unsigned int", etc.

Thanks for applying it. 

Going forward, I will use the long format, like "unsigned long", instead of "ulong", etc.

Thanks,
- Haiyang

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