1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index ff54ae4933f3..e5e6a244096c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1025,6 +1025,7 @@ extern int send_sigurg(struct fown_struct *fown);
 extern struct list_head super_blocks;
 extern spinlock_t sb_lock;
 
+#define sb_entry(list)  list_entry((list), struct super_block, s_list)
 #define S_BIAS (1<<30)
 struct super_block {
         struct list_head        s_list;         /* Keep this first */
@@ -1058,6 +1059,9 @@ struct super_block {
         struct list_head        s_more_io;      /* parked for more writeback */
         struct hlist_head       s_anon;         /* anonymous dentries for (nfs) exporting */
         struct list_head        s_files;
+        /* s_dentry_lru and s_nr_dentry_unused are protected by dcache_lock */
+        struct list_head        s_dentry_lru;   /* unused dentry lru */
+        int                     s_nr_dentry_unused;     /* # of dentry on lru */
 
         struct block_device     *s_bdev;
         struct mtd_info         *s_mtd;