linux-kernel - Re: [PATCH V10 1/3] irq: Allow to pass the IRQF

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Message-ID: <alpine.DEB.2.20.1706201520290.1869@nanos>
Date:   Tue, 20 Jun 2017 16:05:07 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
cc:     linux-kernel@...r.kernel.org, vincent.guittot@...aro.org,
        peterz@...radead.org, rafael@...nel.org, nicolas.pitre@...aro.org,
        Mark Rutland <mark.rutland@....com>,
        Vineet Gupta <vgupta@...opsys.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Patrice Chotard <patrice.chotard@...com>,
        Kukjin Kim <kgene@...nel.org>,
        Javier Martinez Canillas <javier@....samsung.com>,
        Christoffer Dall <christoffer.dall@...aro.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Richard Cochran <rcochran@...utronix.de>,
        Ray Jui <ray.jui@...adcom.com>, Christoph Hellwig <hch@....de>,
        Jens Axboe <axboe@...nel.dk>, Hannes Reinecke <hare@...e.com>,
        "moderated list:ARM PORT" <linux-arm-kernel@...ts.infradead.org>,
        "open list:SYNOPSYS ARC ARCH..." <linux-snps-arc@...ts.infradead.org>,
        "moderated list:ARM/SAMSUNG EXYNO..." 
        <linux-samsung-soc@...r.kernel.org>
Subject: Re: [PATCH V10 1/3] irq: Allow to pass the IRQF_TIMER flag with
 percpu irq request

On Mon, 12 Jun 2017, Daniel Lezcano wrote:
> But, the API request_percpu_irq does not allow to pass a flag, hence specifying
> if the interrupt type is a timer.
> 
> Add a function request_percpu_irq_flags() where we can specify the flags. The
> request_percpu_irq() function is changed to be a wrapper to
> request_percpu_irq_flags() passing a zero flag parameter.

And exactly this change wants to be a separate patch. We do not make whole
sale changes this way. You should know that already and someone pointed
that out to you in some of the earlier versions.

> -int request_percpu_irq(unsigned int irq, irq_handler_t handler,
> -		       const char *devname, void __percpu *dev_id)
> +int request_percpu_irq_flags(unsigned int irq, irq_handler_t handler,

The function name sucks. The first time I read it, it meant request the per
cpu irq flags, which is not what you aim at, right?

Please make that __request_percpu_irq() for now and on -rc1 time provide a
patch set to convert all current request_percpu_irq() users to have the
extra argument and then remove the __request_percpu_irq() intermediate.

Thanks,

	tglx