linux-kernel - Re: [PATCH v3 2/6] smp: add function to execute a function synchronously on a physical cpu

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Message-ID: <20160401073733.GB3448@twins.programming.kicks-ass.net>
Date:	Fri, 1 Apr 2016 09:37:33 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Juergen Gross <jgross@...e.com>
Cc:	linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
	konrad.wilk@...cle.com, boris.ostrovsky@...cle.com,
	david.vrabel@...rix.com, mingo@...hat.com,
	Douglas_Warzecha@...l.com, pali.rohar@...il.com, jdelvare@...e.com,
	linux@...ck-us.net, tglx@...utronix.de, hpa@...or.com,
	jeremy@...p.org, chrisw@...s-sol.org, akataria@...are.com,
	rusty@...tcorp.com.au, virtualization@...ts.linux-foundation.org,
	x86@...nel.org
Subject: Re: [PATCH v3 2/6] smp: add function to execute a function
 synchronously on a physical cpu

On Fri, Apr 01, 2016 at 09:14:30AM +0200, Juergen Gross wrote:
> +	if (cpu >= nr_cpu_ids)
> +		return -EINVAL;

> +	if (cpu != 0)
> +		return -EINVAL;

The other functions return -ENXIO for this.