s390/numa: move code to arch/s390/kernel

Move all code from arch/s390/numa/ to arch/s390/kernel/
since numa.c is the only source file and all others were
deleted with the fake NUMA support removal.

Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/arch/s390/kernel/numa.c b/arch/s390/kernel/numa.c
new file mode 100644
index 000000000000..51c5a9f6e525
--- /dev/null
+++ b/arch/s390/kernel/numa.c
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * NUMA support for s390
+ *
+ * Implement NUMA core code.
+ *
+ * Copyright IBM Corp. 2015
+ */
+
+#include <linux/kernel.h>
+#include <linux/mmzone.h>
+#include <linux/cpumask.h>
+#include <linux/memblock.h>
+#include <linux/node.h>
+#include <asm/numa.h>
+
+struct pglist_data *node_data[MAX_NUMNODES];
+EXPORT_SYMBOL(node_data);
+
+void __init numa_setup(void)
+{
+	int nid;
+
+	nodes_clear(node_possible_map);
+	node_set(0, node_possible_map);
+	node_set_online(0);
+	for (nid = 0; nid < MAX_NUMNODES; nid++) {
+		NODE_DATA(nid) = memblock_alloc(sizeof(pg_data_t), 8);
+		if (!NODE_DATA(nid))
+			panic("%s: Failed to allocate %zu bytes align=0x%x\n",
+			      __func__, sizeof(pg_data_t), 8);
+	}
+	NODE_DATA(0)->node_spanned_pages = memblock_end_of_DRAM() >> PAGE_SHIFT;
+	NODE_DATA(0)->node_id = 0;
+}
+
+static int __init numa_init_late(void)
+{
+	register_one_node(0);
+	return 0;
+}
+arch_initcall(numa_init_late);