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SubjectRe: [PATCH -mm 4/5] Blackfin: patch add blackfin support in smc91x ethernet controller driver
On Thu, 01 Mar 2007 17:23:23 +0800 "Wu, Bryan" <bryan.wu@analog.com> wrote:

> On Thu, 2007-03-01 at 00:54 -0800, Andrew Morton wrote:
> > On Thu, 01 Mar 2007 12:15:29 +0800 "Wu, Bryan" <bryan.wu@analog.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);
> >

You skipped this:

> > Can this not be implemented as a C function?

> +#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)

It can be, I think...

Please always prefer coding in C over coding in cpp.
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