linux-kernel - Re: [RFC PATCH v3 2/8] arm64: Move cpu_die

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Date:	Tue, 15 Dec 2015 11:26:13 +0000
From:	Mark Rutland <mark.rutland@....com>
To:	Will Deacon <will.deacon@....com>
Cc:	"Suzuki K. Poulose" <suzuki.poulose@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	catalin.marinas@....com, marc.zyngier@....com
Subject: Re: [RFC PATCH v3 2/8] arm64: Move cpu_die_early to smp.c

On Tue, Dec 15, 2015 at 11:23:39AM +0000, Will Deacon wrote:
> > +/*
> > + * Kill the calling secondary CPU, early in bringup before it is turned
> > + * online.
> > + */
> > +void cpu_die_early(void)
> > +{
> > +	int cpu = smp_processor_id();
> > +
> > +	pr_crit("CPU%d: will not boot\n", cpu);
> > +
> > +	/* Mark this CPU absent */
> > +	set_cpu_present(cpu, 0);
> > +
> > +#ifdef CONFIG_HOTPLUG_CPU
> > +	/* Check if we can park ourselves */
> > +	if (cpu_ops[cpu] && cpu_ops[cpu]->cpu_die)
> 
> IS_ENABLED?

The definition of struct cpu_ops has cpu_die in an #ifdef
CONFIG_HOTPLUG_CPU.

Mark.
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