linux-kernel - Re: [PATCH 02/11] genirq: Export irq_to

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Message-ID: <87wnn4cqwd.ffs@tglx>
Date:   Sat, 25 Sep 2021 23:00:02 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Florian Fainelli <f.fainelli@...il.com>,
        linux-kernel@...r.kernel.org
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        "maintainer:BROADCOM BCM281XX/BCM11XXX/BCM216XX ARM ARCHITE..." 
        <bcm-kernel-feedback-list@...adcom.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>, Marc Zyngier <maz@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Mike Rapoport <rppt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Arnd Bergmann <arnd@...db.de>,
        Guenter Roeck <linux@...ck-us.net>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Mark Rutland <mark.rutland@....com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Valentin Schneider <valentin.schneider@....com>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        "moderated list:ARM PORT" <linux-arm-kernel@...ts.infradead.org>,
        "open list:SUPERH" <linux-sh@...r.kernel.org>,
        "open list:BROADCOM BMIPS MIPS ARCHITECTURE" 
        <linux-mips@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH 02/11] genirq: Export irq_to_desc() again to modules

On Fri, Sep 24 2021 at 10:05, Florian Fainelli wrote:
> In order to build drivers/irqchip/irq-bcm7038-l1.c as a module (for use
> in GKI), we need to export_to_desc() which is used in this snippet of
> code:
>
> 	irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(virq)));
>
> This effectively reverts 64a1b95bb9fe ("genirq: Restrict export of
> irq_to_desc()").

No. I'm not reexporting this. We've spent quite some time to prevent all
kind of drivers for fiddle with irq descriptors and I'm not going
to reopen that can of worms.

irq_get_irq_data() is exported and provides you what you need.

Thanks,

        tglx