Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...

[sfrench/cifs-2.6.git] / mm / rmap.c

diff --git a/mm/rmap.c b/mm/rmap.c
index 709bc83703b1bfef419fa674ef5b5e28f5d70f05..1ef36404e7b2d7daeef2061ff8f79524d7750bb9 100644 (file)
--- 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. */