Re: [PATCH v15 01/14] mm/page_ext: Export lookup_page_ext() to GPL modules

On Mon, Jun 08, 2020 at 01:53:23PM +0200, David Hildenbrand wrote:

quoted

@@ -131,6 +131,7 @@ struct page_ext *lookup_page_ext(const struct page *page)
 					MAX_ORDER_NR_PAGES);
 	return get_entry(base, index);
 }
+EXPORT_SYMBOL_GPL(lookup_page_ext);
 
 static int __init alloc_node_page_ext(int nid)
 {

I've been told to always smuggle new EXPORTs into the patch that
actually needs it (and cc relevant people on that patch instead).

A separate patch for anything remotely controversial really helps it
to stick out, so I think keeping it separate is a very good practice.