--- zzzz-none-000/linux-3.10.107/fs/9p/cache.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/fs/9p/cache.h	2021-02-04 17:41:59.000000000 +0000
@@ -21,6 +21,7 @@
  */
 
 #ifndef _9P_CACHE_H
+#define _9P_CACHE_H
 #ifdef CONFIG_9P_FSCACHE
 #include <linux/fscache.h>
 #include <linux/spinlock.h>
@@ -101,6 +102,18 @@
 
 #else /* CONFIG_9P_FSCACHE */
 
+static inline void v9fs_cache_inode_get_cookie(struct inode *inode)
+{
+}
+
+static inline void v9fs_cache_inode_put_cookie(struct inode *inode)
+{
+}
+
+static inline void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *file)
+{
+}
+
 static inline int v9fs_fscache_release_page(struct page *page,
 					    gfp_t gfp) {
 	return 1;