Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt...

[mirror_ubuntu-bionic-kernel.git] / fs / buffer.c

diff --git a/fs/buffer.c b/fs/buffer.c
index a3ef091a45bd4664e5ba5e683f9329bda3d1d3df..28f320fac4d4261ec8626d0cfe221be83778c20e 100644 (file)
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1165,8 +1165,11 @@ void mark_buffer_dirty(struct buffer_head *bh)
 
        if (!test_set_buffer_dirty(bh)) {
                struct page *page = bh->b_page;
-               if (!TestSetPageDirty(page))
-                       __set_page_dirty(page, page_mapping(page), 0);
+               if (!TestSetPageDirty(page)) {
+                       struct address_space *mapping = page_mapping(page);
+                       if (mapping)
+                               __set_page_dirty(page, mapping, 0);
+               }
        }
 }