linux-kernel - Re: [PATCH 2/3] irqchip/mips-gic: Get rid of the reliance on irq_cpu

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Date:   Mon, 25 Oct 2021 19:17:34 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Marc Zyngier <maz@...nel.org>, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Serge Semin <fancer.lancer@...il.com>,
        Huacai Chen <chenhuacai@...nel.org>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 2/3] irqchip/mips-gic: Get rid of the reliance on
 irq_cpu_online()



On 10/21/2021 10:04 AM, Marc Zyngier wrote:
> The MIPS GIC driver uses irq_cpu_online() to go and program the
> per-CPU interrupts. However, this method iterates over all IRQs
> in the system, despite only 3 per-CPU interrupts being of interest.
> 
> Let's be terribly bold and do the iteration ourselves. To ensure
> mutual exclusion, hold the gic_lock spinlock that is otherwise
> taken while dealing with these interrupts.
> 
> Signed-off-by: Marc Zyngier <maz@...nel.org>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian