[PATCH, RFC 20/62] mm/page_ext: Export lookup_page_ext() symbol

[Kirill A. Shutemov]

page_keyid() is inline funcation that uses lookup_page_ext(). KVM is
going to use page_keyid() and since KVM can be built as a module
lookup_page_ext() has to be exported.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
 mm/page_ext.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/page_ext.c b/mm/page_ext.c
index 1af8b82087f2..91e4e87f6e41 100644
--- a/mm/page_ext.c
+++ b/mm/page_ext.c
@@ -142,6 +142,7 @@ 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)
 {
@@ -212,6 +213,7 @@ struct page_ext *lookup_page_ext(const struct page *page)
 		return NULL;
 	return get_entry(section->page_ext, pfn);
 }
+EXPORT_SYMBOL_GPL(lookup_page_ext);
 
 static void *__meminit alloc_page_ext(size_t size, int nid)
 {
-- 
2.20.1