3525 Persistent L2ARC

*** 20,29 ****
--- 20,30 ----
   */
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2012 by Delphix. All rights reserved.
   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+  * Copyright 2013 Saso Kiselkov. All rights reserved.
   */
  
  #ifndef _SYS_SPA_H
  #define _SYS_SPA_H
  
*** 290,299 ****
--- 291,311 ----
          (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
          ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
          ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
          ((zc1).zc_word[3] - (zc2).zc_word[3])))
  
+ #define ZIO_CHECKSUM_BSWAP(_zc) \
+         do { \
+                 zio_cksum_t *zc = (_zc); \
+                 zc->zc_word[0] = BSWAP_64(zc->zc_word[0]); \
+                 zc->zc_word[1] = BSWAP_64(zc->zc_word[1]); \
+                 zc->zc_word[2] = BSWAP_64(zc->zc_word[2]); \
+                 zc->zc_word[3] = BSWAP_64(zc->zc_word[3]); \
+                 _NOTE(NOTREACHED) \
+                 _NOTE(CONSTCOND) \
+         } while (0)
+ 
  #define DVA_IS_VALID(dva)       (DVA_GET_ASIZE(dva) != 0)
  
  #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3)   \
  {                                               \
          (zcp)->zc_word[0] = w0;                 \