linux-kernel - Re: [PATCH -mm 4/5] Blackfin: patch add blackfin support in smc91x ethernet controller driver

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Message-Id: <20070301005428.e5823f15.akpm@linux-foundation.org>
Date:	Thu, 1 Mar 2007 00:54:28 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	bryan.wu@...log.com
Cc:	nico@....org, jgarzik@...ox.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm 4/5] Blackfin: patch add blackfin support in smc91x
 ethernet controller driver

On Thu, 01 Mar 2007 12:15:29 +0800 "Wu, Bryan" <bryan.wu@...log.com> wrote:

> +/* check if the mac in reg is valid */
> +#define SMC_GET_MAC_ADDR(addr)					\
> +	do {							\
> +		unsigned int __v;				\
> +		__v = SMC_inw( ioaddr, ADDR0_REG );		\
> +		addr[0] = __v; addr[1] = __v >> 8;		\
> +		__v = SMC_inw( ioaddr, ADDR1_REG );		\
> +		addr[2] = __v; addr[3] = __v >> 8;		\
> +		__v = SMC_inw( ioaddr, ADDR2_REG );		\
> +		addr[4] = __v; addr[5] = __v >> 8;		\
> +		if (*(u32 *)(&addr[0]) == 0xFFFFFFFF) {		\
> +			random_ether_addr(addr);		\
> +		}						\
> +	} while (0)

Please follow kernel coding style:

	__v = SMC_inw(ioaddr, ADDR2_REG);


Can this not be implemented as a C function?
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