linux-kernel - Re: [PATCH v2 11/25] genirq: Kill handle_percpu_devid_fasteoi

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Message-ID: <20250916163838.00003791@huawei.com>
Date: Tue, 16 Sep 2025 16:38:38 +0100
From: Jonathan Cameron <jonathan.cameron@...wei.com>
To: Marc Zyngier <maz@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-acpi@...r.kernel.org>, Thomas Gleixner <tglx@...utronix.de>, "Mark
 Rutland" <mark.rutland@....com>, Will Deacon <will@...nel.org>, "Rafael J.
 Wysocki" <rafael@...nel.org>, Rob Herring <robh@...nel.org>, "Saravana
 Kannan" <saravanak@...gle.com>, Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>, Sven Peter <sven@...nel.org>, Janne Grunau
	<j@...nau.net>, Suzuki K Poulose <suzuki.poulose@....com>, James Clark
	<james.clark@...aro.org>
Subject: Re: [PATCH v2 11/25] genirq: Kill handle_percpu_devid_fasteoi_nmi()

On Mon, 15 Sep 2025 09:56:48 +0100
Marc Zyngier <maz@...nel.org> wrote:

> There is no in-tree user of this flow handler anymore, so simply
> remove it.
> 
> Suggested-by: Will Deacon <will@...nel.org>
> Signed-off-by: Marc Zyngier <maz@...nel.org>
> ---

> diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
> index 0d0276378c707..869068ec6ac91 100644
> --- a/kernel/irq/chip.c
> +++ b/kernel/irq/chip.c
> @@ -892,7 +892,8 @@ void handle_percpu_irq(struct irq_desc *desc)
>   *
>   * action->percpu_dev_id is a pointer to percpu variables which
>   * contain the real device id for the cpu on which this handler is
> - * called
> + * called. This is also used for per-CPU NMIs, so special care is
> + * required.

Probably belongs in previous patch as not really related to removing
the unused code, but meh.

>   */