Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband

[linux-2.6-omap-h63xx.git] / include / linux / dcache.h

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 46a2ba6175954880fcdfa89bc9a9a063f4e76443..4361f3789975d366a39a762d688d02df9408eb82 100644 (file)
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -8,7 +8,6 @@
 #include <linux/spinlock.h>
 #include <linux/cache.h>
 #include <linux/rcupdate.h>
-#include <asm/bug.h>
 
 struct nameidata;
 struct vfsmount;
@@ -95,15 +94,22 @@ 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;
+#ifdef CONFIG_PROFILING
        struct dcookie_struct *d_cookie; /* cookie, if any */
+#endif
        int d_mounted;
        unsigned char d_iname[DNAME_INLINE_LEN_MIN];    /* small names */
 };