[PATCH v4 02/26] MIPS: sgi-ip27: make NODE_DATA() the same as on all other architectures

[Mike Rapoport <rppt@kernel.org>]

From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>

sgi-ip27 is the only system that defines NODE_DATA() differently than
the rest of NUMA machines.

Add node_data array of struct pglist pointers that will point to
__node_data[node]->pglist and redefine NODE_DATA() to use node_data
array.

This will allow pulling declaration of node_data to the generic mm code
in the next commit.

Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> [arm64 + CXL via QEMU]
Acked-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: David Hildenbrand <david@redhat.com>
---
 arch/mips/include/asm/mach-ip27/mmzone.h | 5 ++++-
 arch/mips/sgi-ip27/ip27-memory.c         | 5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/mips/include/asm/mach-ip27/mmzone.h b/arch/mips/include/asm/mach-ip27/mmzone.h
index 08c36e50a860..629c3f290203 100644
--- a/arch/mips/include/asm/mach-ip27/mmzone.h
+++ b/arch/mips/include/asm/mach-ip27/mmzone.h
@@ -22,7 +22,10 @@ struct node_data {
 
 extern struct node_data *__node_data[];
 
-#define NODE_DATA(n)		(&__node_data[(n)]->pglist)
 #define hub_data(n)		(&__node_data[(n)]->hub)
 
+extern struct pglist_data *node_data[];
+
+#define NODE_DATA(nid)		(node_data[nid])
+
 #endif /* _ASM_MACH_MMZONE_H */
diff --git a/arch/mips/sgi-ip27/ip27-memory.c b/arch/mips/sgi-ip27/ip27-memory.c
index b8ca94cfb4fe..c30ef6958b97 100644
--- a/arch/mips/sgi-ip27/ip27-memory.c
+++ b/arch/mips/sgi-ip27/ip27-memory.c
@@ -34,8 +34,10 @@
 #define SLOT_PFNSHIFT		(SLOT_SHIFT - PAGE_SHIFT)
 #define PFN_NASIDSHFT		(NASID_SHFT - PAGE_SHIFT)
 
-struct node_data *__node_data[MAX_NUMNODES];
+struct pglist_data *node_data[MAX_NUMNODES];
+EXPORT_SYMBOL(node_data);
 
+struct node_data *__node_data[MAX_NUMNODES];
 EXPORT_SYMBOL(__node_data);
 
 static u64 gen_region_mask(void)
@@ -361,6 +363,7 @@ static void __init node_mem_init(nasid_t node)
 	 */
 	__node_data[node] = __va(slot_freepfn << PAGE_SHIFT);
 	memset(__node_data[node], 0, PAGE_SIZE);
+	node_data[node] = &__node_data[node]->pglist;
 
 	NODE_DATA(node)->node_start_pfn = start_pfn;
 	NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
-- 
2.43.0