From: Frederic Weisbecker <frederic@kernel.org>
To: Gabriele Monaco <gmonaco@redhat.com>
Cc: linux-kernel@vger.kernel.org,
Anna-Maria Behnsen <anna-maria@linutronix.de>,
Thomas Gleixner <tglx@linutronix.de>,
Waiman Long <longman@redhat.com>,
Yury Norov <yury.norov@gmail.com>
Subject: Re: [PATCH v13 8/9] cpumask: Add initialiser to use cleanup helpers
Date: Wed, 17 Sep 2025 18:44:59 +0200 [thread overview]
Message-ID: <aMrlizyqkQ9Zsrz4@localhost.localdomain> (raw)
In-Reply-To: <20250917161958.178925-9-gmonaco@redhat.com>
Le Wed, Sep 17, 2025 at 06:19:57PM +0200, Gabriele Monaco a écrit :
> From: Yury Norov <yury.norov@gmail.com>
>
> Now we can simplify a code that allocates cpumasks for local needs.
>
> Automatic variables have to be initialized at declaration, or at least
> before any possibility for the logic to return, so that compiler
> wouldn't try to call an associate destructor function on a random stack
> number.
>
> Because cpumask_var_t, depending on the CPUMASK_OFFSTACK config, is
> either a pointer or an array, we have to have a macro for initialization.
>
> So define a CPUMASK_VAR_NULL macro, which allows to init struct cpumask
> pointer with NULL when CPUMASK_OFFSTACK is enabled, and effectively a
> no-op when CPUMASK_OFFSTACK is disabled.
>
> Signed-off-by: Yury Norov <yury.norov@gmail.com>
> Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
--
Frederic Weisbecker
SUSE Labs
next prev parent reply other threads:[~2025-09-17 16:45 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-17 16:19 [PATCH v13 0/9] timers: Exclude isolated cpus from timer migration Gabriele Monaco
2025-09-17 16:19 ` [PATCH v13 1/9] timers/migration: Postpone online/offline callbacks registration to late initcall Gabriele Monaco
2025-09-17 16:19 ` [PATCH v13 2/9] timers: Rename tmigr 'online' bit to 'available' Gabriele Monaco
2025-09-17 16:19 ` [PATCH v13 3/9] timers: Add the available mask in timer migration Gabriele Monaco
2025-09-17 16:19 ` [PATCH v13 4/9] timers: Use scoped_guard when setting/clearing the tmigr available flag Gabriele Monaco
2025-09-17 16:19 ` [PATCH v13 5/9] cgroup/cpuset: Rename update_unbound_workqueue_cpumask() to update_exclusion_cpumasks() Gabriele Monaco
2025-09-17 16:19 ` [PATCH v13 6/9] sched/isolation: Force housekeeping if isolcpus and nohz_full don't leave any Gabriele Monaco
2025-09-17 16:19 ` [PATCH v13 7/9] cgroup/cpuset: Fail if isolated and nohz_full don't leave any housekeeping Gabriele Monaco
2025-09-17 16:19 ` [PATCH v13 8/9] cpumask: Add initialiser to use cleanup helpers Gabriele Monaco
2025-09-17 16:44 ` Frederic Weisbecker [this message]
2025-09-17 16:19 ` [PATCH v13 9/9] timers: Exclude isolated cpus from timer migration Gabriele Monaco
2025-09-17 16:59 ` Frederic Weisbecker
2025-09-17 17:02 ` [PATCH v13 0/9] " Frederic Weisbecker
2025-09-17 20:30 ` Waiman Long
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