linux-kernel - Re: [PATCH v4 1/2] genirq: Change hwirq parameter to irq_hw_number

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Message-ID: <557b0fdc-6f13-4676-90e4-062d8ff1bd66@linux.ibm.com>
Date: Thu, 20 Nov 2025 10:33:05 -0800
From: Farhan Ali <alifm@...ux.ibm.com>
To: Tobias Schumacher <ts@...ux.ibm.com>, Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev
 <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Niklas Schnelle
 <schnelle@...ux.ibm.com>,
        Gerald Schaefer <gerald.schaefer@...ux.ibm.com>,
        Gerd Bayer <gbayer@...ux.ibm.com>, Halil Pasic <pasic@...ux.ibm.com>,
        Matthew Rosato <mjrosato@...ux.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org
Subject: Re: [PATCH v4 1/2] genirq: Change hwirq parameter to irq_hw_number_t


On 11/20/2025 2:27 AM, Tobias Schumacher wrote:
> The irqdomain implementation internally represents hardware IRQs as
> irq_hw_number_t, which is defined as unsigned long int. When providing
> an irq_hw_number_t to the generic_handle_domain() functions that expect
> and unsigned int hwirq, this can lead to a loss of information. Change
> the hwirq parameter to irq_hw_number_t to support the full range of
> hwirqs.
>
> Reviewed-by: Thomas Gleixner<tglx@...utronix.de>
> Reviewed-by: Niklas Schnelle<schnelle@...ux.ibm.com>
> Signed-off-by: Tobias Schumacher<ts@...ux.ibm.com>
> ---
>   include/linux/irqdesc.h | 6 +++---
>   kernel/irq/irqdesc.c    | 6 +++---
>   2 files changed, 6 insertions(+), 6 deletions(-)

Reviewed-by: Farhan Ali <alifm@...ux.ibm.com>