linux-kernel - RE: [PATCH 2.6.20-rc3] UCC Ether driver: kmalloc casting cleanups

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Date:	Mon, 8 Jan 2007 15:28:20 +0800
From:	"Li Yang-r58472" <LeoLi@...escale.com>
To:	"Ahmed S. Darwish" <darwish.07@...il.com>
Cc:	<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: RE: [PATCH 2.6.20-rc3] UCC Ether driver: kmalloc casting cleanups

> -----Original Message-----
> From: Ahmed S. Darwish [mailto:darwish.07@...il.com]
> Sent: Monday, January 08, 2007 12:27 PM
> To: Li Yang-r58472
> Cc: linux-kernel@...r.kernel.org; netdev@...r.kernel.org
> Subject: Re: [PATCH 2.6.20-rc3] UCC Ether driver: kmalloc casting
cleanups
> 
> On Mon, Jan 08, 2007 at 11:12:28AM +0800, Li Yang-r58472 wrote:
> > > From: Ahmed S. Darwish [mailto:darwish.07@...il.com]
> > >
> > > Hi,
> > > A kmalloc casting cleanup patch.
> > > Signed-off-by: Ahmed Darwish <darwish.07@...il.com>
> 
> [..]
> 
> > > -				(u32) (kmalloc((u32) (length + align),
> > > -				GFP_KERNEL));
> > > +				kmalloc((u32) (length + align),
GFP_KERNEL);
> > > +
> > >  			if (ugeth->tx_bd_ring_offset[j] != 0)
> > >  				ugeth->p_tx_bd_ring[j] =
> 
> [..]
> 
> > > -			    (u32) (kmalloc((u32) (length + align),
GFP_KERNEL));
> > > +				kmalloc((u32) (length + align),
GFP_KERNEL);
> >
> > NACK about the 2 clean-ups above.  Cast from pointer to integer is
> > required here.
> 
> Are the casts from pointer to integer just needed to suppress gcc
> warnings or there's something technically important about them ?

It is to suppress the warnings.  IMHO, most type casts are not
technically important but for sanity check.

- Leo
-
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