linux-kernel - Re: [PATCH] LoongArch: Fix the !CONFIG

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Message-ID: <f92fc4f34784217206b53a3709538d5c@kernel.org>
Date:   Wed, 10 Aug 2022 12:01:14 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Huacai Chen <chenhuacai@...ngson.cn>
Cc:     Huacai Chen <chenhuacai@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        loongarch@...ts.linux.dev, Xuefeng Li <lixuefeng@...ngson.cn>,
        Guo Ren <guoren@...nel.org>, Xuerui Wang <kernel@...0n.name>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] LoongArch: Fix the !CONFIG_SMP build for irqchip drivers

On 2022-08-10 11:31, Huacai Chen wrote:
> 1, Guard get_ipi_irq() in CONFIG_SMP;
> 2, Define cpu_logical_map() for the EIOINTC driver;
> 3, Make eiointc_set_irq_affinity() return early for !CONFIG_SMP.
> 
> Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>

Frankly, the real question is why do you even bother? As far as
I can tell, LoongArch has no UP system.

arm64 crossed that bridge a long time ago, and we never looked
back, because these systems hardly exist.

I'd rather you simply have a CONFIG_SMP always set to 'y', and
be done with it forever.

         M.
-- 
Jazz is not dead. It just smells funny...