linux-kernel - Re: [PATCH 4.4 4.9 v1 0/2] Fix repeated WARNING in unpin_current

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Message-ID: <aBScIx13vT5c1i8V@duo.ucw.cz>
Date: Fri, 2 May 2025 12:19:15 +0200
From: Pavel Machek <pavel@...x.de>
To: Kazuhiro Hayashi <kazuhiro3.hayashi@...hiba.co.jp>
Cc: linux-kernel@...r.kernel.org, linux-rt-devel@...ts.linux.dev,
	cip-dev@...ts.cip-project.org, bigeasy@...utronix.de,
	tglx@...utronix.de, rostedt@...dmis.org,
	linux-rt-users@...r.kernel.org
Subject: Re: [PATCH 4.4 4.9 v1 0/2] Fix repeated WARNING in
 unpin_current_cpu()

Hi!

> This is a patch series for v4.4-rt and v4.9-rt to resolve problem that
> WARNING in unpin_current_cpu() happens repeatedly while kernel is booting.
> Please see commit message of the second patch (2/2) for more details about
> the problem and how it's resolved. The first patch (1/2) is a preparation
> for the fix (2/2), considering compatibility issue in future updates.
> 
> As the both v4.4-rt and v4.9-rt have been EOL already, it's not expected
> that this series is applied to the branches anymore.
> On the other hand, the Civil Infrastructure Platform Project (CIP)
> has been maintaining its 4.4 SLTS RT kernel[1][2] based on v4.4-rt,
> and needs to fix the problem above by this series.
> 
> It is much appreciated if RT experts could take a look at the series
> and give feedbacks about its way to resolve the problem, which is
> based on the same approach as changes happend around v4.14-rt.

Thanks for patches, and sorry for the delays. 4.4.302-cip98-rt55 is
out, and it should contain your fixes.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,        Managing Director: Erika Unter
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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