linux-kernel - Re: [PATCH] genirq: warn about IRQF_SHARED|IRQF

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Date:	Mon, 30 Nov 2009 12:21:30 -0800
From:	David Brownell <david-b@...bell.net>
To:	"Uwe Kleine-König" 
	<u.kleine-koenig@...gutronix.de>
Cc:	linux-kernel@...r.kernel.org,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>, Nicolas Pitre <nico@...vell.com>,
	Eric Miao <eric.y.miao@...il.com>,
	John Stultz <johnstul@...ibm.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Remy Bohmer <linux@...mer.net>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Andrea Gallo <andrea.gallo@...ricsson.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jamie Lokier <jamie@...reable.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] genirq: warn about IRQF_SHARED|IRQF_DISABLED at the right place

On Monday 30 November 2009, Uwe Kleine-König wrote:
> +               if (new->flags & IRQF_DISABLED)
> +                       pr_warning("IRQ %d/%s: IRQF_DISABLED is not guaranteed "
> +                                       "on shared IRQs\n", irq, new->name);

This should have copied the original test ... this way,
it's dropping the SHARED constraint, and trying to morph
into a generic "IRQF_DISABLED is eeebil!" test.

If it just moved the original test, I'd have no problem
with the patch.


... although it'd still not address the general mess in
this area, it'd at least not introduce false warnings.
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