shmem_fs.h.patch

--- include/linux/shmem_fs.h.orig	2013-11-20 13:46:54.609963899 +0900
+++ include/linux/shmem_fs.h	2013-11-20 14:24:31.313954190 +0900
@@ -10,6 +10,24 @@
 
 #define SHMEM_NR_DIRECT 16
 
+struct simple_xattrs {
+        struct list_head head;
+        spinlock_t lock;
+};
+
+struct simple_xattr {
+        struct list_head list;
+        char *name;
+        size_t size;
+        char value[0];
+};
+
+static inline void simple_xattrs_init(struct simple_xattrs *xattrs)
+{
+        INIT_LIST_HEAD(&xattrs->head);
+        spin_lock_init(&xattrs->lock);
+}
+
 struct shmem_inode_info {
 	spinlock_t		lock;
 	unsigned long		flags;
@@ -18,6 +36,7 @@
 	struct shared_policy	policy;		/* NUMA memory alloc policy */
 	swp_entry_t		i_direct[SHMEM_NR_DIRECT]; /* first blocks */
 	struct list_head	swaplist;	/* chain of maybes on swap */
+        struct simple_xattrs    xattrs;         /* list of xattrs */
 	struct inode		vfs_inode;
 };