diff --git a/fs/ceph/cache.h b/fs/ceph/cache.h
index da95f61b7a09..5ac591bd012b 100644
--- a/fs/ceph/cache.h
+++ b/fs/ceph/cache.h
@@ -48,6 +48,12 @@ void ceph_readpage_to_fscache(struct inode *inode, struct page *page);
 void ceph_invalidate_fscache_page(struct inode* inode, struct page *page);
 void ceph_queue_revalidate(struct inode *inode);
 
+static inline void ceph_fscache_update_objectsize(struct inode *inode)
+{
+	struct ceph_inode_info *ci = ceph_inode(inode);
+	fscache_attr_changed(ci->fscache);
+}
+
 static inline void ceph_fscache_invalidate(struct inode *inode)
 {
 	fscache_invalidate(ceph_inode(inode)->fscache);
@@ -135,6 +141,10 @@ static inline void ceph_readpage_to_fscache(struct inode *inode,
 {
 }
 
+static inline void ceph_fscache_update_objectsize(struct inode *inode)
+{
+}
+
 static inline void ceph_fscache_invalidate(struct inode *inode)
 {
 }