[PATCH v2] MIPS: Fix build error for loongson64 and sgi-ip27

[Feiyang Chen <chris.chenfeiyang@xxxxxxxxx>]

Select HAVE_ARCH_NODEDATA_EXTENSION for loongson64 to fix build error
when CONFIG_NUMA=y:

mips64el-unknown-linux-gnu-ld: mm/page_alloc.o: in function `free_area_init':
(.init.text+0x1714): undefined reference to `node_data'
mips64el-unknown-linux-gnu-ld: (.init.text+0x1730): undefined reference to `node_data'

Also, select HAVE_ARCH_NODEDATA_EXTENSION for sgi-ip27 to fix build error:

mips64el-unknown-linux-gnu-ld: mm/page_alloc.o: in function `free_area_init':
page_alloc.c:(.init.text+0x1ba8): undefined reference to `node_data'
mips64el-unknown-linux-gnu-ld: page_alloc.c:(.init.text+0x1bcc): undefined reference to `node_data'
mips64el-unknown-linux-gnu-ld: page_alloc.c:(.init.text+0x1be4): undefined reference to `node_data'
mips64el-unknown-linux-gnu-ld: page_alloc.c:(.init.text+0x1bf4): undefined reference to `node_data'

Signed-off-by: Feiyang Chen <chenfeiyang@xxxxxxxxxxx>
---
 arch/mips/Kconfig                |  5 +++++
 arch/mips/loongson64/numa.c      | 10 ++++++++++
 arch/mips/sgi-ip27/ip27-memory.c | 10 ++++++++++
 3 files changed, 25 insertions(+)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 0dae5f1e61cc..de3b32a507d2 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -513,6 +513,7 @@ config MACH_LOONGSON64
 	select USE_OF
 	select BUILTIN_DTB
 	select PCI_HOST_GENERIC
+	select HAVE_ARCH_NODEDATA_EXTENSION if NUMA
 	help
 	  This enables the support of Loongson-2/3 family of machines.
 
@@ -709,6 +710,7 @@ config SGI_IP27
 	select WAR_R10000_LLSC
 	select MIPS_L1_CACHE_SHIFT_7
 	select NUMA
+	select HAVE_ARCH_NODEDATA_EXTENSION
 	help
 	  This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
 	  workstations.  To compile a Linux kernel that runs on these, say Y
@@ -2708,6 +2710,9 @@ config NUMA
 config SYS_SUPPORTS_NUMA
 	bool
 
+config HAVE_ARCH_NODEDATA_EXTENSION
+	bool
+
 config RELOCATABLE
 	bool "Relocatable kernel"
 	depends on SYS_SUPPORTS_RELOCATABLE
diff --git a/arch/mips/loongson64/numa.c b/arch/mips/loongson64/numa.c
index e8e3e48c5333..69a533148efd 100644
--- a/arch/mips/loongson64/numa.c
+++ b/arch/mips/loongson64/numa.c
@@ -197,3 +197,13 @@ void __init prom_init_numa_memory(void)
 	prom_meminit();
 }
 EXPORT_SYMBOL(prom_init_numa_memory);
+
+pg_data_t * __init arch_alloc_nodedata(int nid)
+{
+	return memblock_alloc(sizeof(pg_data_t), SMP_CACHE_BYTES);
+}
+
+void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
+{
+	__node_data[nid] = pgdat;
+}
diff --git a/arch/mips/sgi-ip27/ip27-memory.c b/arch/mips/sgi-ip27/ip27-memory.c
index adc2faeecf7c..f79c48393716 100644
--- a/arch/mips/sgi-ip27/ip27-memory.c
+++ b/arch/mips/sgi-ip27/ip27-memory.c
@@ -422,3 +422,13 @@ void __init mem_init(void)
 	memblock_free_all();
 	setup_zero_pages();	/* This comes from node 0 */
 }
+
+pg_data_t * __init arch_alloc_nodedata(int nid)
+{
+	return memblock_alloc(sizeof(pg_data_t), SMP_CACHE_BYTES);
+}
+
+void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
+{
+	__node_data[nid] = (struct node_data *)pgdat;
+}
-- 
2.27.0