From: Wolfram Sang <wsa@kernel.org>
To: Benjamin Bara <bbara93@gmail.com>
Cc: Lee Jones <lee@kernel.org>,
rafael.j.wysocki@intel.com, dmitry.osipenko@collabora.com,
jonathanh@nvidia.com, richard.leitner@linux.dev,
treding@nvidia.com, linux-kernel@vger.kernel.org,
linux-i2c@vger.kernel.org, linux-tegra@vger.kernel.org,
Benjamin Bara <benjamin.bara@skidata.com>,
stable@vger.kernel.org
Subject: Re: [PATCH v3 2/4] i2c: core: run atomic i2c xfer when !preemptible
Date: Wed, 29 Mar 2023 21:50:42 +0200 [thread overview]
Message-ID: <ZCSWkhyQjnzByDoR@shikoro> (raw)
In-Reply-To: <CAJpcXm6bt100442y8ajz7kR0nF3Gm9PVVwo3EKVBDC4Pmd-7Ag@mail.gmail.com>
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On Mon, Mar 27, 2023 at 06:23:24PM +0200, Benjamin Bara wrote:
> On Mon, 27 Mar 2023 at 16:54, Wolfram Sang <wsa@kernel.org> wrote:
> > For the !CONFIG_PREEMPT_COUNT case, preemptible() is defined 0. So,
> > don't we lose the irqs_disabled() check in that case?
>
> Thanks for the feedback!
> PREEMPT_COUNT is selected by PREEMPTION, so I guess in the case of
> !PREEMPT_COUNT,
> we should be atomic (anyways)?
Could you make sure please? Asking Peter Zijlstra might be a good idea.
He helped me with the current implementation.
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next prev parent reply other threads:[~2023-03-29 19:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-27 13:57 [PATCH v3 0/4] mfd: tps6586x: register restart handler Benjamin Bara
2023-03-27 13:57 ` [PATCH v3 1/4] kernel/reboot: emergency_restart: set correct system_state Benjamin Bara
2023-03-27 13:57 ` [PATCH v3 2/4] i2c: core: run atomic i2c xfer when !preemptible Benjamin Bara
2023-03-27 14:54 ` Wolfram Sang
2023-03-27 16:23 ` Benjamin Bara
2023-03-29 19:50 ` Wolfram Sang [this message]
2023-04-02 10:04 ` Benjamin Bara
2023-04-04 8:22 ` Peter Zijlstra
2023-04-04 14:06 ` Benjamin Bara
2023-03-27 13:57 ` [PATCH v3 3/4] mfd: tps6586x: use devm-based power off handler Benjamin Bara
2023-04-02 22:28 ` Dmitry Osipenko
2023-03-27 13:57 ` [PATCH v3 4/4] mfd: tps6586x: register restart handler Benjamin Bara
2023-04-02 22:30 ` Dmitry Osipenko
2023-04-03 6:50 ` Benjamin Bara
2023-04-03 15:44 ` Dmitry Osipenko
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