linux-kernel - Re: [PATCH v2 1/4] arm: Make set_handle_irq and handle_arch

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Date:   Thu, 25 Jan 2018 10:05:57 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Palmer Dabbelt <palmer@...ive.com>
cc:     linux@...linux.org.uk, catalin.marinas@....com,
        Will Deacon <will.deacon@....com>, jonas@...thpole.se,
        stefan.kristiansson@...nalahti.fi, shorne@...il.com,
        Christoph Hellwig <hch@...radead.org>,
        Arnd Bergmann <arnd@...db.de>, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, patches@...ups.riscv.org
Subject: Re: [PATCH v2 1/4] arm: Make set_handle_irq and handle_arch_irq
 generic

On Wed, 24 Jan 2018, Palmer Dabbelt wrote:

> It looks like this same irqchip registration mechanism has been copied
> into a handful of ports, including aarch64 and openrisc.  I want to use
> this in the RISC-V port, so I thought it would be good to make this
> generic instead.
> 
> This patch simply moves set_handle_irq and handle_arch_irq from arch/arm
> to kernel/irq/handle.c.
> 
> Signed-off-by: Palmer Dabbelt <palmer@...ive.com>
> ---
>  arch/arm/Kconfig             |  5 -----
>  arch/arm/include/asm/irq.h   |  5 -----
>  arch/arm/kernel/entry-armv.S |  6 ------
>  arch/arm/kernel/irq.c        | 10 ----------
>  include/linux/irq.h          | 18 ++++++++++++++++++
>  kernel/irq/Kconfig           |  5 +++++
>  kernel/irq/handle.c          | 10 ++++++++++

Please split the patches into two pieces:

1) Add the infrastructure to the generic code and have a new Kconfig symbol

   GENERIC_IRQ_MULTI_HANDLER

   or something which fits in the GENERIC_IRQ_ name space.

   That also makes sure that the build does not fail after patch 1 for the
   non converted arch. With your change this breaks arm64 build with only
   patch 1 applied because the Kconfig symbol is defined twice and the code
   is defined twice. See drivers/irqchip/Kconfig ARM_GIC_V3 ....
   
2) Convert both arm and arm64 over along with the select statements in the
   arch and irqchip Kconfigs

Thanks,

	tglx