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Date: Tue, 4 Dec 2018 10:28:41 +0100
From: Peter Zijlstra <peterz@infradead.org>
Subject: Re: [RFC v2 13/13] keys/mktme: Support CPU Hotplug for MKTME keys
Message-ID: <20181204092841.GU11614@hirez.programming.kicks-ass.net>
References: <cover.1543903910.git.alison.schofield@intel.com>
 <c14d24b09ee2ae37ea4106726ce8fe2aea31f6c7.1543903910.git.alison.schofield@intel.com>
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To: Alison Schofield <alison.schofield@intel.com>
Cc: dhowells@redhat.com, tglx@linutronix.de, jmorris@namei.org, mingo@redhat.com, hpa@zytor.com, bp@alien8.de, luto@kernel.org, kirill.shutemov@linux.intel.com, dave.hansen@intel.com, kai.huang@intel.com, jun.nakajima@intel.com, dan.j.williams@intel.com, jarkko.sakkinen@intel.com, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org

On Mon, Dec 03, 2018 at 11:40:00PM -0800, Alison Schofield wrote:
> +	for_each_online_cpu(online_cpu)
> +		if (online_cpu != cpu &&
> +		    pkgid == topology_physical_package_id(online_cpu)) {
> +			cpumask_set_cpu(online_cpu, mktme_leadcpus);
> +			break;
> +	}

That's a capital offence right there.