staging: lustre: wrong parameter to cfs_hash_keycpy

cfs_hash_rehash_key() passed wrong parameter to cfs_hash_keycpy,
hnode should be the second parameter not the third one.
Signed-off-by: Liang Zhen <liang.zhen@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4362
Reviewed-on: http://review.whamcloud.com/8509Reviewed-by: Bobi Jam <bobijam@gmail.com>
Reviewed-by: Johann Lombardi <johann.lombardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/libcfs/hash.c

@@ -2005,7 +2005,7 @@ void cfs_hash_rehash_key(struct cfs_hash *hs, const void *old_key,
 	}
 	/* overwrite key inside locks, otherwise may screw up with
 	 * other operations, i.e: rehash */
-	cfs_hash_keycpy(hs, new_key, hnode);
+	cfs_hash_keycpy(hs, hnode, new_key);
 
 	cfs_hash_multi_bd_unlock(hs, bds, 3, 1);
 	cfs_hash_unlock(hs, 0);