From: "Marek Behún" <kabel@kernel.org>
To: George Stark <gnstark@salutedevices.com>
Cc: kabel@kernel.org, linuxppc-dev@lists.ozlabs.org,
vadimp@nvidia.com, mazziesaccount@gmail.com,
peterz@infradead.org, boqun.feng@gmail.com, lee@kernel.org,
kernel@salutedevices.com, linux-kernel@vger.kernel.org,
npiggin@gmail.com, hdegoede@redhat.com,
andy.shevchenko@gmail.com, mingo@redhat.com, pavel@ucw.cz,
longman@redhat.com, nikitos.tr@gmail.com, will@kernel.org,
linux-leds@vger.kernel.org
Subject: Re: [PATCH v6 1/9] locking/mutex: introduce devm_mutex_init
Date: Thu, 14 Mar 2024 11:40:25 +0100 [thread overview]
Message-ID: <20240314114025.1e27399e@thinkpad> (raw)
In-Reply-To: <20240314084531.1935545-2-gnstark@salutedevices.com>
On Thu, 14 Mar 2024 11:45:23 +0300
George Stark <gnstark@salutedevices.com> wrote:
> Using of devm API leads to a certain order of releasing resources.
> So all dependent resources which are not devm-wrapped should be deleted
> with respect to devm-release order. Mutex is one of such objects that
> often is bound to other resources and has no own devm wrapping.
> Since mutex_destroy() actually does nothing in non-debug builds
> frequently calling mutex_destroy() is just ignored which is safe for now
> but wrong formally and can lead to a problem if mutex_destroy() will be
> extended so introduce devm_mutex_init()
>
> Signed-off-by: George Stark <gnstark@salutedevices.com>
> Suggested by-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Marek Behún <kabel@kernel.org>
next prev parent reply other threads:[~2024-03-14 10:41 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-14 8:45 [PATCH v6 0/9] devm_led_classdev_register() usage problem George Stark
2024-03-14 8:45 ` [PATCH v6 1/9] locking/mutex: introduce devm_mutex_init George Stark
2024-03-14 9:02 ` Christophe Leroy
2024-03-14 10:33 ` Andy Shevchenko
2024-03-14 10:40 ` Marek Behún [this message]
2024-03-14 13:32 ` Waiman Long
2024-03-14 8:45 ` [PATCH v6 2/9] leds: aw2013: use devm API to cleanup module's resources George Stark
2024-03-14 8:45 ` [PATCH v6 3/9] leds: aw200xx: " George Stark
2024-03-14 8:45 ` [PATCH v6 4/9] leds: lp3952: " George Stark
2024-03-14 8:45 ` [PATCH v6 5/9] leds: lm3532: " George Stark
2024-03-14 8:45 ` [PATCH v6 6/9] leds: nic78bx: " George Stark
2024-03-14 8:45 ` [PATCH v6 7/9] leds: mlxreg: use devm_mutex_init for mutex initializtion George Stark
2024-03-14 8:45 ` [PATCH v6 8/9] leds: an30259a: use devm_mutext_init for mutext initialization George Stark
2024-03-14 8:45 ` [PATCH v6 9/9] leds: powernv: use LED_RETAIN_AT_SHUTDOWN flag for leds George Stark
2024-03-14 10:34 ` Andy Shevchenko
2024-03-14 10:37 ` [PATCH v6 0/9] devm_led_classdev_register() usage problem Andy Shevchenko
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