[PATCH] add /sys/fs

[safe/jmp/linux-2.6] / include / linux / dcache.h

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 46a2ba6..a3ed5e0 100644 (file)
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -95,14 +95,19 @@ struct dentry {
        struct qstr d_name;
 
        struct list_head d_lru;         /* LRU list */
-       struct list_head d_child;       /* child of parent list */
+       /*
+        * d_child and d_rcu can share memory
+        */
+       union {
+               struct list_head d_child;       /* child of parent list */
+               struct rcu_head d_rcu;
+       } d_u;
        struct list_head d_subdirs;     /* our children */
        struct list_head d_alias;       /* inode alias list */
        unsigned long d_time;           /* used by d_revalidate */
        struct dentry_operations *d_op;
        struct super_block *d_sb;       /* The root of the dentry tree */
        void *d_fsdata;                 /* fs-specific data */
-       struct rcu_head d_rcu;
        struct dcookie_struct *d_cookie; /* cookie, if any */
        int d_mounted;
        unsigned char d_iname[DNAME_INLINE_LEN_MIN];    /* small names */