linux-kernel - Re: [PATCH v13 05/17] irq & spin_lock: Add counted interrupt disabling/enabling

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Message-ID: <878qgm7yqn.fsf@t14s.mail-host-address-is-not-set>
Date: Tue, 04 Nov 2025 13:45:20 +0100
From: Andreas Hindborg <a.hindborg@...nel.org>
To: Lyude Paul <lyude@...hat.com>, rust-for-linux@...r.kernel.org, Thomas
 Gleixner <tglx@...utronix.de>, Boqun Feng <boqun.feng@...il.com>,
 linux-kernel@...r.kernel.org, Daniel Almeida
 <daniel.almeida@...labora.com>
Cc: Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>,
 Juri Lelli <juri.lelli@...hat.com>, Vincent Guittot
 <vincent.guittot@...aro.org>, Dietmar Eggemann <dietmar.eggemann@....com>,
 Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>, Mel
 Gorman <mgorman@...e.de>, Valentin Schneider <vschneid@...hat.com>, Will
 Deacon <will@...nel.org>, Waiman Long <longman@...hat.com>, Miguel Ojeda
 <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, Gary Guo
 <gary@...yguo.net>, Björn Roy Baron
 <bjorn3_gh@...tonmail.com>, Benno
 Lossin <lossin@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, Trevor
 Gross <tmgross@...ch.edu>, Danilo Krummrich <dakr@...nel.org>, David
 Woodhouse <dwmw@...zon.co.uk>, Sebastian Andrzej Siewior
 <bigeasy@...utronix.de>, Joel Fernandes <joelagnelf@...dia.com>, Ryo
 Takakura <ryotkkr98@...il.com>, K Prateek Nayak <kprateek.nayak@....com>
Subject: Re: [PATCH v13 05/17] irq & spin_lock: Add counted interrupt
 disabling/enabling

Hi Lyude,

Lyude Paul <lyude@...hat.com> writes:

> From: Boqun Feng <boqun.feng@...il.com>

<cut>

> diff --git a/include/linux/irqflags_types.h b/include/linux/irqflags_types.h
> index c13f0d915097a..277433f7f53eb 100644
> --- a/include/linux/irqflags_types.h
> +++ b/include/linux/irqflags_types.h
> @@ -19,4 +19,10 @@ struct irqtrace_events {
>  
>  #endif
>  
> +/* Per-cpu interrupt disabling state for local_interrupt_{disable,enable}() */
> +struct interrupt_disable_state {
> +	unsigned long flags;
> +	long count;

Is this `count` field dead?

> +};
> +


Best regards,
Andreas Hindborg