[PATCH] ia64: export memory_add_physaddr_to_nid to fix cxl build error

[Randy Dunlap]

cxl_pmem.ko uses memory_add_physaddr_to_nid() but ia64 does not export it,
so this causes a build error:

ERROR: modpost: "memory_add_physaddr_to_nid" [drivers/cxl/cxl_pmem.ko] undefined!

Fix this by exporting that function.

Fixes: 8c2676a5870a ("hot-add-mem x86_64: memory_add_physaddr_to_nid node fixup")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Ben Widawsky <bwidawsk@xxxxxxxxxx>
Cc: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Cc: linux-ia64@xxxxxxxxxxxxxxx
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Keith Mannthey <kmannth@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Arnd, can you take this in your one-off fixes arch tree, or would
you prefer for Andrew to take it?

 arch/ia64/mm/numa.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/ia64/mm/numa.c
+++ b/arch/ia64/mm/numa.c
@@ -75,5 +75,6 @@ int memory_add_physaddr_to_nid(u64 addr)
 		return 0;
 	return nid;
 }
+EXPORT_SYMBOL(memory_add_physaddr_to_nid);
 #endif
 #endif