linux-kernel - RE: [PATCH v2 2/4] arm64: hyperv: Add support for Hyper-V as a hypervisor

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Message-ID: <CY4PR21MB077373EB5898095B481E1158DC0F0@CY4PR21MB0773.namprd21.prod.outlook.com>
Date:   Fri, 31 Aug 2018 15:44:20 +0000
From:   "Michael Kelley (EOSG)" <Michael.H.Kelley@...rosoft.com>
To:     KY Srinivasan <kys@...rosoft.com>,
        "will.deacon@....com" <will.deacon@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "marc.zyngier@....com" <marc.zyngier@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "olaf@...fle.de" <olaf@...fle.de>,
        "apw@...onical.com" <apw@...onical.com>,
        vkuznets <vkuznets@...hat.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "marcelo.cerri@...onical.com" <marcelo.cerri@...onical.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>
Subject: RE: [PATCH v2 2/4] arm64: hyperv: Add support for Hyper-V as a
 hypervisor

From: KY Srinivasan  Sent: Thursday, August 30, 2018 11:51 AM

> > +	/* Allocate percpu VP index */
> > +	hv_vp_index = kmalloc_array(num_possible_cpus(),
> > sizeof(*hv_vp_index),
> > +				    GFP_KERNEL);
> > +	if (!hv_vp_index)
> > +		return 1;
> > +
> We should perhaps set the array so the contents are invalid so we can correctly
> handle enlightenments for TL shootdown and IPI.

Agreed.  Will add the initialization in v3 of the patch.

Michael