From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Hildenbrand Subject: [PATCH v3 4/6] powerpc/powernv: hold device_hotplug_lock when calling device_online() Date: Thu, 27 Sep 2018 11:25:52 +0200 Message-ID: <20180927092554.13567-5-david@redhat.com> References: <20180927092554.13567-1-david@redhat.com> Return-path: In-Reply-To: <20180927092554.13567-1-david@redhat.com> Sender: linux-kernel-owner@vger.kernel.org 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 List-Id: linux-acpi@vger.kernel.org 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 Reviewed-by: Pavel Tatashin Reviewed-by: Rashmica Gupta 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 773623f6bfb1..fdd48f1a39f7 100644 --- a/arch/powerpc/platforms/powernv/memtrace.c +++ b/arch/powerpc/platforms/powernv/memtrace.c @@ -242,9 +242,11 @@ 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