Update core ZFS code from build 121 to build 141.

[zfs.git] / module / zfs / include / sys / refcount.h

diff --git a/module/zfs/include/sys/refcount.h b/module/zfs/include/sys/refcount.h
index d3fe7b1..bc3ade8 100644 (file)
--- a/module/zfs/include/sys/refcount.h
+++ b/module/zfs/include/sys/refcount.h
@@ -19,15 +19,12 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  */
 
 #ifndef        _SYS_REFCOUNT_H
 #define        _SYS_REFCOUNT_H
 
-#pragma ident  "%Z%%M% %I%     %E% SMI"
-
 #include <sys/inttypes.h>
 #include <sys/list.h>
 #include <sys/zfs_context.h>
@@ -91,6 +88,11 @@ typedef struct refcount {
        atomic_add_64_nv(&(rc)->rc_count, number)
 #define        refcount_remove_many(rc, number, holder) \
        atomic_add_64_nv(&(rc)->rc_count, -number)
+#define        refcount_transfer(dst, src) { \
+       uint64_t __tmp = (src)->rc_count; \
+       atomic_add_64(&(src)->rc_count, -__tmp); \
+       atomic_add_64(&(dst)->rc_count, __tmp); \
+}
 
 #define        refcount_init()
 #define        refcount_fini()