Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
---
mm/memlayout.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/mm/memlayout.c b/mm/memlayout.c
index 45e7df6..4dc6706 100644
--- a/mm/memlayout.c
+++ b/mm/memlayout.c
@@ -247,3 +247,19 @@ void memlayout_global_init(void)
memlayout_commit(ml);
}
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+/*
+ * Provides a default memory_add_physaddr_to_nid() for memory hotplug, unless
+ * overridden by the arch.
+ */
+__weak
+int memory_add_physaddr_to_nid(u64 start)
+{
+ int nid = memlayout_pfn_to_nid(PFN_DOWN(start));
+ if (nid == NUMA_NO_NODE)
+ return 0;
+ return nid;
+}
+EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
+#endif
--
1.8.2.1
--
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