linux-kernel - Re: [PATCH v2 4/6] genirq/test: Depend on SPARSE

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Message-ID: <aKzUP8TczQmuAEXU@google.com>
Date: Mon, 25 Aug 2025 14:23:11 -0700
From: Brian Norris <briannorris@...omium.org>
To: David Gow <davidgow@...gle.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org,
	Guenter Roeck <linux@...ck-us.net>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	kunit-dev@...glegroups.com
Subject: Re: [PATCH v2 4/6] genirq/test: Depend on SPARSE_IRQ

On Sat, Aug 23, 2025 at 02:59:26PM +0800, David Gow wrote:
> On Sat, 23 Aug 2025 at 03:01, Brian Norris <briannorris@...omium.org> wrote:
> > Notably, this also excludes ARCH=um from running any of these tests,
> > even though some of them might work.
> 
> I confess to being disappointed that we lose ARCH=um support with this
> -- it's nice to have it run on the "default" configuration -- but the
> correct way of solving this is probably to support SPARSE_IRQ on UML,
> which is probably more work than it's worth.

I made an educated guess on how to support SPARSE_IRQ for ARCH=um, and I
got something working here:

[PATCH] um: Support SPARSE_IRQ
http://lore.kernel.org/all/20250825212031.111027-1-briannorris@chromium.org

Brian