linux-kernel - Re: [PATCH] clocksource/drivers/jcore: Use request_percpu

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Message-ID: <21cc2173-2934-470e-a151-ed3fe2bba9db@linaro.org>
Date: Mon, 2 Sep 2024 12:33:01 +0200
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: Uros Bizjak <ubizjak@...il.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Rich Felker <dalias@...c.org>,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clocksource/drivers/jcore: Use request_percpu_irq()

On 02/09/2024 12:11, Uros Bizjak wrote:
> On Mon, Sep 2, 2024 at 11:17 AM Daniel Lezcano
> <daniel.lezcano@...aro.org> wrote:
>>
>> On 30/07/2024 15:20, Uros Bizjak wrote:
>>> Use request_percpu_irq() instead of request_irq() to solve
>>> the following sparse warning:
>>>
>>> jcore-pit.c:173:40: warning: incorrect type in argument 5 (different address spaces)
>>> jcore-pit.c:173:40:    expected void *dev
>>> jcore-pit.c:173:40:    got struct jcore_pit [noderef] __percpu *static [assigned] [toplevel] jcore_pit_percpu
>>>
>>> Compile tested only.
>>>
>>> Signed-off-by: Uros Bizjak <ubizjak@...il.com>
>>> Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
>>> Cc: Thomas Gleixner <tglx@...utronix.de>
>>> ---
>>
>> Added Rich Felker in Cc
>>
>> Applied, thanks
> 
> I think we also need the following patch, since we changed request_irq
> to request_percpu_irq:

Hmm, I think you are right:

I would say it is:

static irqreturn_t jcore_timer_interrupt(int irq, void *dev_id)
{
         struct jcore_pit *pit = dev_id;

	OR

	struct jcore_pit *pit = this_cpu_ptr(jcore_pit_percpu);

	[ ... ]
}

The former the better for the encapsulation.

Do you mind to update the patch ?

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