linux-kernel - Re: [PATCH 8/8] imx: serial: add IrDA support to serial driver

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Message-ID: <20090609180416.GA1213@emlix.com>
Date:	Tue, 9 Jun 2009 20:04:16 +0200
From:	Oskar Schirmer <os@...ix.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Oskar Schirmer <os@...ix.com>,
	Sascha Hauer <kernel@...gutronix.de>,
	linux-kernel@...r.kernel.org, Fabian Godehardt <fg@...ix.com>
Subject: Re: [PATCH 8/8] imx: serial: add IrDA support to serial driver

On Tue, Jun 09, 2009 at 18:07:38 +0100, Alan Cox wrote:
> > Sure, the path will be optimized away, but still
> > the conditional statement is subjected to syntax
> > and scope analysis and gcc will correctly complain
> > that irda_inv_rx is not declared.
> 
> Why are only about half of them done this way rather than all ?

Because only half of them use IrDA specific struct fields
directly, thus need to be ifdef'd explicitely.

Like I wrote before, we could replace all the

if (USE_IRDA(x)) ...

with some

#ifdef CONFIG_IRDA
if (x->use_irda) ...

but that way we would have more ifdef's around.
A matter of taste, I'ld say. If you vote for the
latter, we can adjust the patch accordingly, of
course.

  Oskar
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