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Date: Tue, 21 Aug 2018 12:44:16 +0200 From: David Hildenbrand <david@...hat.com> To: linux-mm@...ck.org Cc: linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, linux-acpi@...r.kernel.org, xen-devel@...ts.xenproject.org, devel@...uxdriverproject.org, David Hildenbrand <david@...hat.com>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org>, Michael Ellerman <mpe@...erman.id.au>, Rashmica Gupta <rashmica.g@...il.com>, Balbir Singh <bsingharora@...il.com>, Michael Neuling <mikey@...ling.org> Subject: [PATCH RFCv2 4/6] powerpc/powernv: hold device_hotplug_lock when calling device_online() device_online() should be called with device_hotplug_lock() held. Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org> Cc: Paul Mackerras <paulus@...ba.org> Cc: Michael Ellerman <mpe@...erman.id.au> Cc: Rashmica Gupta <rashmica.g@...il.com> Cc: Balbir Singh <bsingharora@...il.com> Cc: Michael Neuling <mikey@...ling.org> Signed-off-by: David Hildenbrand <david@...hat.com> --- 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
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