netdev - RE: [PATCH] declance: Fix 64-bit compilation warnings

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Date:	Mon, 30 Jun 2014 09:44:33 +0000
From:	David Laight <David.Laight@...LAB.COM>
To:	'Joe Perches' <joe@...ches.com>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH] declance: Fix 64-bit compilation warnings

From: Joe Perches
> On Sat, 2014-06-28 at 23:57 +0100, Maciej W. Rozycki wrote:
> > This fixes compiler warnings:
> >
> > drivers/net/ethernet/amd/declance.c: In function 'lance_init_ring':
> > drivers/net/ethernet/amd/declance.c:478: warning: format '%8.8x' expects type 'unsigned int', but
> argument 3 has type 'long unsigned int'
> > drivers/net/ethernet/amd/declance.c:487: warning: format '%8.8x' expects type 'unsigned int', but
> argument 3 has type 'long unsigned int'
> > drivers/net/ethernet/amd/declance.c:503: warning: cast from pointer to integer of different size
> > drivers/net/ethernet/amd/declance.c:520: warning: cast from pointer to integer of different size
> >
> > in 64-bit compilation.  Where the value printed is an offset (whose range
> > will always fit) the cast uses a 32-bit type, otherwise, where it is a
> > host memory address, the `long' type is used and the width of the number
> > printed adjusted according to the size of this type.
> >
> > Tested with both 32-bit and 64-bit compilation, as well as at the run time
> > (with the debug messages affected enabled).
> []
> > Index: net-next-20140424-4maxp64/drivers/net/ethernet/amd/declance.c
> []
> > @@ -499,8 +499,9 @@ static void lance_init_ring(struct net_d
> >  						/* The ones required by tmd2 */
> >  		*lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
> >  		if (i < 3 && ZERO)
> > -			printk("%d: 0x%8.8x(0x%8.8x)\n",
> > -			       i, leptr, (uint)lp->tx_buf_ptr_cpu[i]);
> > +			printk("%d: 0x%8.8x(%#0*lx)\n",
> > +			       i, leptr, (int)sizeof(long),
> > +			       (long)lp->tx_buf_ptr_cpu[i]);
> 
> You need to adjust the "*" and sizeof(long) with +2 for the
> 0x prefix in the output length here.

Do you need all the leading zeros at all?

	David



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