netdev - Re: [PATCH 01/04] smc91x: pass along private data

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Date:	Thu, 21 Feb 2008 11:14:51 +0900
From:	"Magnus Damm" <magnus.damm@...il.com>
To:	"Nicolas Pitre" <nico@....org>
Cc:	netdev@...r.kernel.org, lethal@...ux-sh.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH 01/04] smc91x: pass along private data

On Thu, Feb 21, 2008 at 12:42 AM, Nicolas Pitre <nico@....org> wrote:
> On Wed, 20 Feb 2008, Magnus Damm wrote:
>
>  > Pass a private data pointer to macros and functions. This makes it easy
>  > to later on make run time decisions. This patch does not change any logic.
>  > These changes should be optimized away during compilation.
>  >
>  > Signed-off-by: Magnus Damm <damm@...l.co.jp>
>  > ---
>
> > --- 0001/drivers/net/smc91x.c
>  > +++ work/drivers/net/smc91x.c 2008-02-20 16:52:48.000000000 +0900
>  > @@ -220,23 +220,23 @@ static void PRINT_PKT(u_char *buf, int l
>  >
>  >
>  >  /* this enables an interrupt in the interrupt mask register */
>  > -#define SMC_ENABLE_INT(x) do {                                               \
>  > +#define SMC_ENABLE_INT(priv, x) do {                                 \
>  >       unsigned char mask;                                             \
>  > -     spin_lock_irq(&lp->lock);                                       \
>  > -     mask = SMC_GET_INT_MASK();                                      \
>  > +     spin_lock_irq(&priv->lock);                                     \
>  > +     mask = SMC_GET_INT_MASK(priv);                                  \
>
>  Since "lp" is already used all over the place, could you simply use "lp"
>  for the macro argument name as well instead of "priv"?  This will make
>  the code more uniform and reduce the patch size.

I used the name "priv" instead of "lp" intentionally to make sure I
got compile errors if I missed something. Some variables like "ioaddr"
are today not passed as arguments to the macros but simply assumed to
be present as local variables. I wanted to avoid using the local "lp"
variable by mistake. So the "priv" name is actually a feature. =)

I'd be happy to rewrite the patch to use "lp" though, but I have to
confess that I don't see the point in redoing it. Anyway, please let
me know what you prefer.

Thank you.

/ magnus
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