Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753113AbcLCSlu (ORCPT ); Sat, 3 Dec 2016 13:41:50 -0500 Received: from p3plsmtps2ded02.prod.phx3.secureserver.net ([208.109.80.59]:46874 "EHLO p3plsmtps2ded02.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751372AbcLCSjp (ORCPT ); Sat, 3 Dec 2016 13:39:45 -0500 x-originating-ip: 72.167.245.219 From: kys@exchange.microsoft.com To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com, jasowang@redhat.com, leann.ogasawara@canonical.com Cc: "K. Y. Srinivasan" Subject: [PATCH V2 06/15] hv: allocate synic pages for all present CPUs Date: Sat, 3 Dec 2016 12:34:33 -0800 Message-Id: <1480797282-10126-6-git-send-email-kys@exchange.microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1480797282-10126-1-git-send-email-kys@exchange.microsoft.com> References: <1480797239-10085-1-git-send-email-kys@exchange.microsoft.com> <1480797282-10126-1-git-send-email-kys@exchange.microsoft.com> Reply-To: kys@microsoft.com X-CMAE-Envelope: MS4wfGkCmaAYs4o9TXezJbNJ/A4gUGxxtISn7iVopWdjDy08s905ldBypLwgc3oGxF3gCBww1P+WKL8cf5LUkcUGpCqlVb866JEPzV3M+CPHPDxsrxBRP8p5 PnjgmeDsWqAJrSkb1il8MSegcRHUTvbb9xBLnidAPGMYc2sF0oEB0Z8SxT6t+2Q90vNuknRacO8XoZ2kMJzc+9uvj0MDLAT4kKQg6/Lf39SxvMtyeFMn9WVf fXbF5mT5Ydct6Js1I32J3fyoEDnTjTV8tefN0Ih7Ut4UyD4Uz2rg1MX3PcRHqHAnE4BD9WBC6kxaOvkrW8V6hdUhL/Zj5h2BlORQAbkkXpLqgNR9JdSZKPsM ZByvYw+92H9Qz4QggFTaKe3ssW46pSfKHcN6O/6LyhkcvVeogyAUKlpykjFflpZMmvnGz9OehkUhhaJJ/Y4I67JvYa7KiONN8xSmDyLfLFxxpqh3yQQ= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 979 Lines: 36 From: Vitaly Kuznetsov It may happen that not all CPUs are online when we do hv_synic_alloc() and in case more CPUs come online later we may try accessing these allocated structures. Signed-off-by: Vitaly Kuznetsov Signed-off-by: K. Y. Srinivasan --- drivers/hv/hv.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 60dbd6c..e4bb498 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -411,7 +411,7 @@ int hv_synic_alloc(void) goto err; } - for_each_online_cpu(cpu) { + for_each_present_cpu(cpu) { hv_context.event_dpc[cpu] = kmalloc(size, GFP_ATOMIC); if (hv_context.event_dpc[cpu] == NULL) { pr_err("Unable to allocate event dpc\n"); @@ -482,7 +482,7 @@ void hv_synic_free(void) int cpu; kfree(hv_context.hv_numa_map); - for_each_online_cpu(cpu) + for_each_present_cpu(cpu) hv_synic_free_cpu(cpu); } -- 1.7.4.1