This exports memory_add_physaddr_to_nid() for module driver to use.

memory_add_physaddr_to_nid() is a fallback option to get the nid in case
NUMA_NO_NID is detected.

Suggested-by: David Hildenbrand <redacted>
Signed-off-by: Jia He <redacted>
---
 arch/arm64/mm/numa.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
index aafcee3e3f7e..7eeb31740248 100644
--- a/arch/arm64/mm/numa.c
+++ b/arch/arm64/mm/numa.c

@@ -464,10 +464,11 @@ void __init arm64_numa_init(void)
 
 /*
  * We hope that we will be hotplugging memory on nodes we already know about,
- * such that acpi_get_node() succeeds and we never fall back to this...
+ * such that acpi_get_node() succeeds. But when SRAT is not present, the node
+ * id may be probed as NUMA_NO_NODE by acpi, Here provide a fallback option.
  */
 int memory_add_physaddr_to_nid(u64 addr)
 {
-	pr_warn("Unknown node for memory at 0x%llx, assuming node 0\n", addr);
 	return 0;
 }
+EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);