linux-kernel - Re: [PATCH v2 14/17] arm64: Kill __smp_cross

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Date:   Thu, 25 Jun 2020 19:25:56 +0100
From:   Valentin Schneider <valentin.schneider@....com>
To:     Marc Zyngier <maz@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Russell King <linux@....linux.org.uk>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Sumit Garg <sumit.garg@...aro.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Andrew Lunn <andrew@...n.ch>, kernel-team@...roid.com
Subject: Re: [PATCH v2 14/17] arm64: Kill __smp_cross_call and co


On 24/06/20 20:58, Marc Zyngier wrote:
> @@ -852,8 +841,7 @@ void arch_send_wakeup_ipi_mask(const struct cpumask *mask)
>  #ifdef CONFIG_IRQ_WORK
>  void arch_irq_work_raise(void)
>  {
> -	if (__smp_cross_call)
> -		smp_cross_call(cpumask_of(smp_processor_id()), IPI_IRQ_WORK);
> +	smp_cross_call(cpumask_of(smp_processor_id()), IPI_IRQ_WORK);

AIU the following commit:

  eb631bb5bf5b ("arm64: Support arch_irq_work_raise() via self IPIs")

It seems arm64 hasn't needed that check since

  4b3dc9679cf7 ("arm64: force CONFIG_SMP=y and remove redundant #ifdefs")

Did I get that right?

>  }
>  #endif
>