Message-ID: <1391608993.2538.74.camel@joe-AO722> (sfid-20140205_150321_283528_F4F05C55)
Subject: Re: [ath9k-devel] [PATCH 1/3] ath9k: Fix build error on ARM
From: Joe Perches <joe@perches.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Holger Schurig <holgerschurig@gmail.com>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	Sujith Manoharan <sujith@msujith.org>,
	ath9k-devel <ath9k-devel@lists.ath9k.org>,
	linux-wireless <linux-wireless@vger.kernel.org>,
	John Linville <linville@tuxdriver.com>
Date: Wed, 05 Feb 2014 06:03:13 -0800
In-Reply-To: <20140205133956.GQ26684@n2100.arm.linux.org.uk>
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On Wed, 2014-02-05 at 13:39 +0000, Russell King - ARM Linux wrote:
> On Wed, Feb 05, 2014 at 05:04:54AM -0800, Joe Perches wrote:
> > On Wed, 2014-02-05 at 12:41 +0000, Russell King - ARM Linux wrote:
> > > On Wed, Feb 05, 2014 at 04:32:46AM -0800, Joe Perches wrote:
> > > > Apparently, people just convert stupidly large udelay()s
> > > > to mdelay and not be bothered.
> > > 
> > > And that's the correct answer.  Having udelay(10000) rather than mdelay(10)
> > > is a sign that they weren't paying that much attention when writing the
> > > code.
> > 
> > Not really.
[]
> > It's not so much not paying attention as not
> > knowing ARM is broken for large udelay().
> 
> And now read my suggestion about how to avoid the "not knowing" problem. :)

I'd read it already.  I didn't and don't disagree.

I still think adding a #warning on large static udelay()s
would be sensible.  Maybe adding another option like
#define UDELAY_TOO_BIG_I_KNOW_ALREADY_DONT_BOTHER_ME
guard to avoid seeing the #warning when there's no other
option.