netdev - Re: [PATCH v2] declance: Fix 64-bit compilation warnings

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Date:	Thu, 3 Jul 2014 03:34:04 +0100 (BST)
From:	"Maciej W. Rozycki" <macro@...ux-mips.org>
To:	David Miller <davem@...emloft.net>
cc:	netdev@...r.kernel.org, joe@...ches.com
Subject: Re: [PATCH v2] declance: Fix 64-bit compilation warnings

On Thu, 3 Jul 2014, Maciej W. Rozycki wrote:

> > > @@ -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, 2 * (int)sizeof(long) + 2,
> > > +			       (long)lp->tx_buf_ptr_cpu[i]);
> > 
> > Please just use "%p", no casts required.
> 
>  Hmm, there was something about %p that made me reject it, however I can't 
> recall what it was and I can get the desired output with this format 
> specifier (the NULL special case difference can be ignored, the pointers 
> printed here won't ever be NULL).  Sending an update right away.

 Ah, there it is:

drivers/net/ethernet/amd/declance.c: In function 'lance_init_ring':
drivers/net/ethernet/amd/declance.c:503: warning: '#' flag used with '%p' printf format
drivers/net/ethernet/amd/declance.c:520: warning: '#' flag used with '%p' printf format

That's obviously GCC's incompatibility to our implementation.  I'm not 
sure if that can be worked around, but I'll see what I can do about it.

  Maciej
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