From mboxrd@z Thu Jan 1 00:00:00 1970 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> References: <20180821104418.12710-1-david@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20180821104418.12710-1-david@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" To: linux-mm@kvack.org Cc: Michael Neuling , linux-doc@vger.kernel.org, Benjamin Herrenschmidt , Balbir Singh , David Hildenbrand , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Paul Mackerras , Michael Ellerman , xen-devel@lists.xenproject.org, devel@linuxdriverproject.org, Rashmica Gupta , linuxppc-dev@lists.ozlabs.org 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 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