linux-kernel - RE: [PATCH AUTOSEL 6.3 07/17] arm64/hyperv: Use CPUHP_AP_HYPERV_ONLINE state to fix CPU online sequencing

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Message-ID: <BYAPR21MB16886629B821C5D846125004D725A@BYAPR21MB1688.namprd21.prod.outlook.com>
Date:   Thu, 29 Jun 2023 22:18:56 +0000
From:   "Michael Kelley (LINUX)" <mikelley@...rosoft.com>
To:     Sasha Levin <sashal@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     Dexuan Cui <decui@...rosoft.com>, Wei Liu <wei.liu@...nel.org>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will@...nel.org" <will@...nel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH AUTOSEL 6.3 07/17] arm64/hyperv: Use
 CPUHP_AP_HYPERV_ONLINE state to fix CPU online sequencing

From: Sasha Levin <sashal@...nel.org> Sent: Thursday, June 29, 2023 12:01 PM
> 
> From: Michael Kelley <mikelley@...rosoft.com>
> 
> [ Upstream commit 52ae076c3a9b366b6fa9f7c7e67aed8b28716ed9 ]
> 
> State CPUHP_AP_HYPERV_ONLINE has been introduced to correctly sequence the
> initialization of hyperv_pcpu_input_arg. Use this new state for Hyper-V
> initialization so that hyperv_pcpu_input_arg is allocated early enough.
> 

State CPUHP_AP_HYPERV_ONLINE was introduced in 6.4.  There's no need
to backport this patch to stable releases.

Michael