linux-kernel - Re: [PATCH RFC] regmap: maple: Provide lockdep (sub)class for maple tree's internal lock

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Message-ID: <cff230b1-cf19-4f19-8f93-e3cb2b3ed9b3@collabora.com>
Date: Thu, 31 Oct 2024 18:47:42 +0200
From: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To: Mark Brown <broonie@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 "Rafael J. Wysocki" <rafael@...nel.org>, Heiko Stuebner <heiko@...ech.de>,
 Andy Yan <andy.yan@...k-chips.com>, kernel@...labora.com,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC] regmap: maple: Provide lockdep (sub)class for maple
 tree's internal lock

On 10/31/24 4:29 PM, Mark Brown wrote:
> On Tue, Oct 29, 2024 at 11:50:12PM +0200, Cristian Ciocaltea wrote:
>> In some cases when using the maple tree register cache, the lockdep
>> validator might complain about invalid deadlocks:
> 
> This doesn't apply against current code, please check and resend.

It was based on next-20241028 which contained commit 49a85851b14c
("regcache: Store values more directly in maple trees"), but that seems to
have been dropped recently.

I've sent v2 [1], which applies cleanly on both v6.12-rc5 and
next-20241031.

Thanks,
Cristian

[1] https://lore.kernel.org/lkml/20241031-regmap-maple-lockdep-fix-v2-1-06a3710f3623@collabora.com/