Merge branch 'linus' into smp/hotplug

Apply upstream changes to avoid conflicts with pending patches.

1 files changed, 4 insertions, 3 deletions

diff --git a/mm/rmap.c b/mm/rmap.c
index 709bc83703b1..1ef36404e7b2 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1284,8 +1284,9 @@ void page_add_file_rmap(struct page *page, bool compound)
                 VM_BUG_ON_PAGE(!PageSwapBacked(page), page);
                 __inc_node_page_state(page, NR_SHMEM_PMDMAPPED);
         } else {
-                if (PageTransCompound(page)) {
-                        VM_BUG_ON_PAGE(!PageLocked(page), page);
+                if (PageTransCompound(page) && page_mapping(page)) {
+                        VM_WARN_ON_ONCE(!PageLocked(page));
+
                         SetPageDoubleMap(compound_head(page));
                         if (PageMlocked(page))
                                 clear_page_mlock(compound_head(page));
@@ -1303,7 +1304,7 @@ static void page_remove_file_rmap(struct page *page, bool compound)
 {
         int i, nr = 1;
 
-        VM_BUG_ON_PAGE(compound && !PageTransHuge(page), page);
+        VM_BUG_ON_PAGE(compound && !PageHead(page), page);
         lock_page_memcg(page);
 
         /* Hugepages are not counted in NR_FILE_MAPPED for now. */