Add linux kernel disk support

Native Linux vdev disk interfaces

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

module/zfs/zfs_dir.c

@@ -22,6 +22,8 @@
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  */
 
+#ifdef HAVE_ZPL
+
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/time.h>
@@ -1087,3 +1089,4 @@ zfs_sticky_remove_access(znode_t *zdp, znode_t *zp, cred_t *cr)
 	else
 		return (secpolicy_vnode_remove(cr));
 }
+#endif /* HAVE_ZPL */