diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index b81a367b9f39bb056cc4127a674e8a3dd4d2567d..9597eec8239d3f2e3fc2052179ed588643be53e0 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1801,7 +1801,7 @@ int __ref remove_memory(int nid, u64 start, u64 size)
 	int retry = 1;
 
 	start_pfn = PFN_DOWN(start);
-	end_pfn = start_pfn + PFN_DOWN(size);
+	end_pfn = PFN_UP(start + size - 1);
 
 	/*
 	 * When CONFIG_MEMCG is on, one memory block may be used by other