Date:   Wed, 29 Dec 2021 12:12:11 +0100
From:   Pavel Machek <pavel@denx.de>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     linux-kernel@vger.kernel.org, stable@vger.kernel.org,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Daniel Borkmann <daniel@iogearbox.net>
Subject: Re: [PATCH 5.10 091/132] Documentation/locking/locktypes: Update
 migrate_disable() bits.
Message-ID: <20211229111211.GA25195@amd>
References: <20211213092939.074326017@linuxfoundation.org>
 <20211213092942.231632373@linuxfoundation.org>
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Hi!

> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
>=20
> commit 6a631c0432dcccbcf45839016a07c015e335e9ae upstream.
>=20
> The initial implementation of migrate_disable() for mainline was a
> wrapper around preempt_disable(). RT kernels substituted this with
> a real migrate disable implementation.
>=20
> Later on mainline gained true migrate disable support, but the
> documentation was not updated.
>=20
> Update the documentation, remove the claims about migrate_disable()
> mapping to preempt_disable() on non-PREEMPT_RT kernels.

> Fixes: 74d862b682f51 ("sched: Make migrate_disable/enable()
>  independent of RT")

AFAICT this commit is not present in 5.10... so this breaks
documentation, rather than improving it. (And should be reverted from
5.10).

Best regards,
								Pavel
--=20
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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