1 files changed, 3 insertions, 1 deletions

diff --git a/mm/debug.c b/mm/debug.c
index 0abb987dad9b..1611cf00a137 100644
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -44,7 +44,7 @@ const struct trace_print_flags vmaflag_names[] = {
 
 void __dump_page(struct page *page, const char *reason)
 {
-        struct address_space *mapping = page_mapping(page);
+        struct address_space *mapping;
         bool page_poisoned = PagePoisoned(page);
         int mapcount;
 
@@ -58,6 +58,8 @@ void __dump_page(struct page *page, const char *reason)
                 goto hex_only;
         }
 
+        mapping = page_mapping(page);
+
         /*
          * Avoid VM_BUG_ON() in page_mapcount().
          * page->_mapcount space in struct page is used by sl[aou]b pages to