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

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Date:	Sat, 28 Jun 2014 16:06:58 -0700
From:	Joe Perches <joe@...ches.com>
To:	"Maciej W. Rozycki" <macro@...ux-mips.org>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] declance: Fix 64-bit compilation warnings

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.



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