v4.19.13 snapshot.
diff --git a/arch/sh/mm/numa.c b/arch/sh/mm/numa.c
new file mode 100644
index 0000000..830e8b3
--- /dev/null
+++ b/arch/sh/mm/numa.c
@@ -0,0 +1,56 @@
+/*
+ * arch/sh/mm/numa.c - Multiple node support for SH machines
+ *
+ * Copyright (C) 2007 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/module.h>
+#include <linux/memblock.h>
+#include <linux/mm.h>
+#include <linux/numa.h>
+#include <linux/pfn.h>
+#include <asm/sections.h>
+
+struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
+EXPORT_SYMBOL_GPL(node_data);
+
+/*
+ * On SH machines the conventional approach is to stash system RAM
+ * in node 0, and other memory blocks in to node 1 and up, ordered by
+ * latency. Each node's pgdat is node-local at the beginning of the node,
+ * immediately followed by the node mem map.
+ */
+void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
+{
+ unsigned long start_pfn, end_pfn;
+
+ /* Don't allow bogus node assignment */
+ BUG_ON(nid >= MAX_NUMNODES || nid <= 0);
+
+ start_pfn = PFN_DOWN(start);
+ end_pfn = PFN_DOWN(end);
+
+ pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
+ PAGE_KERNEL);
+
+ memblock_add(start, end - start);
+
+ __add_active_range(nid, start_pfn, end_pfn);
+
+ /* Node-local pgdat */
+ NODE_DATA(nid) = __va(memblock_alloc_base(sizeof(struct pglist_data),
+ SMP_CACHE_BYTES, end));
+ memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
+
+ NODE_DATA(nid)->node_start_pfn = start_pfn;
+ NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
+
+ /* It's up */
+ node_set_online(nid);
+
+ /* Kick sparsemem */
+ sparse_memory_present_with_active_regions(nid);
+}