From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-f199.google.com (mail-qt0-f199.google.com [209.85.216.199]) by kanga.kvack.org (Postfix) with ESMTP id 507DB6B1E4C for ; Tue, 21 Aug 2018 06:44:50 -0400 (EDT) Received: by mail-qt0-f199.google.com with SMTP id e14-v6so15847245qtp.17 for ; Tue, 21 Aug 2018 03:44:50 -0700 (PDT) Received: from mx1.redhat.com (mx3-rdu2.redhat.com. [66.187.233.73]) by mx.google.com with ESMTPS id q11-v6si11179048qkl.387.2018.08.21.03.44.49 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 21 Aug 2018 03:44:49 -0700 (PDT) From: David Hildenbrand Subject: [PATCH RFCv2 4/6] powerpc/powernv: hold device_hotplug_lock when calling device_online() Date: Tue, 21 Aug 2018 12:44:16 +0200 Message-Id: <20180821104418.12710-5-david@redhat.com> In-Reply-To: <20180821104418.12710-1-david@redhat.com> References: <20180821104418.12710-1-david@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-acpi@vger.kernel.org, xen-devel@lists.xenproject.org, devel@linuxdriverproject.org, David Hildenbrand , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Rashmica Gupta , Balbir Singh , Michael Neuling device_online() should be called with device_hotplug_lock() held. Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: Rashmica Gupta Cc: Balbir Singh Cc: Michael Neuling Signed-off-by: David Hildenbrand --- arch/powerpc/platforms/powernv/memtrace.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c index 8f1cd4f3bfd5..ef7181d4fe68 100644 --- a/arch/powerpc/platforms/powernv/memtrace.c +++ b/arch/powerpc/platforms/powernv/memtrace.c @@ -229,9 +229,11 @@ static int memtrace_online(void) * we need to online the memory ourselves. */ if (!memhp_auto_online) { + lock_device_hotplug(); walk_memory_range(PFN_DOWN(ent->start), PFN_UP(ent->start + ent->size - 1), NULL, online_mem_block); + unlock_device_hotplug(); } /* -- 2.17.1