1 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 7cb043d8f4e8..4bb4de8d95ea 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -161,6 +161,7 @@ struct dentry_operations {
         struct vfsmount *(*d_automount)(struct path *);
         int (*d_manage)(struct dentry *, bool);
         struct inode *(*d_select_inode)(struct dentry *, unsigned);
+        struct dentry *(*d_real)(struct dentry *, struct inode *);
 } ____cacheline_aligned;
 
 /*
@@ -229,6 +230,7 @@ struct dentry_operations {
 #define DCACHE_OP_SELECT_INODE          0x02000000 /* Unioned entry: dcache op selects inode */
 
 #define DCACHE_ENCRYPTED_WITH_KEY       0x04000000 /* dir is encrypted with a valid key */
+#define DCACHE_OP_REAL                  0x08000000
 
 extern seqlock_t rename_lock;
 
@@ -555,4 +557,12 @@ static inline struct dentry *d_backing_dentry(struct dentry *upper)
         return upper;
 }
 
+static inline struct dentry *d_real(struct dentry *dentry)
+{
+        if (unlikely(dentry->d_flags & DCACHE_OP_REAL))
+                return dentry->d_op->d_real(dentry, NULL);
+        else
+                return dentry;
+}
+
 #endif  /* __LINUX_DCACHE_H */