LU-376 Positive LL_DIR_END_OFF to indicate the tail of dir hash/offset

[fs/lustre-release.git] / lustre / include / lustre_lite.h

diff --git a/lustre/include/lustre_lite.h b/lustre/include/lustre_lite.h
index c9c1129..7fa9937 100644 (file)
--- a/lustre/include/lustre_lite.h
+++ b/lustre/include/lustre_lite.h
@@ -26,7 +26,7 @@
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  */
 /*
@@ -37,6 +37,11 @@
 #ifndef _LL_H
 #define _LL_H
 
+/** \defgroup lite lite
+ *
+ * @{
+ */
+
 #if defined(__linux__)
 #include <linux/lustre_lite.h>
 #elif defined(__APPLE__)
@@ -145,8 +150,15 @@ static inline void ll_dir_chain_fini(struct ll_dir_chain *chain)
 {
 }
 
-static inline unsigned long hash_x_index(unsigned long value)
+static inline unsigned long hash_x_index(__u64 hash, int hash64)
 {
-        return ~0UL - value;
+#ifdef __KERNEL__
+        if (BITS_PER_LONG == 32 && hash64)
+                hash >>= 32;
+#endif
+        return ~0UL - hash;
 }
+
+/** @} lite */
+
 #endif