3006 VERIFY[S,U,P] and ASSERT[S,U,P] frequently check if first argument is zero

@@ -18,10 +18,11 @@
  *
  * CDDL HEADER END
  */
 /*
  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012 by Delphix. All rights reserved.
  */
 
 /*
  * The System Duty Cycle (SDC) scheduling class
  * --------------------------------------------

@@ -1303,14 +1304,14 @@
 
         sdp.sdp_minpri = sysdc_minpri;
         sdp.sdp_maxpri = sysdc_maxpri;
         sdp.sdp_DC = MAX(MIN(dc, sysdc_maxDC), sysdc_minDC);
 
-        VERIFY3U(CL_ALLOC(&buf, sysdccid, KM_SLEEP), ==, 0);
+        VERIFY0(CL_ALLOC(&buf, sysdccid, KM_SLEEP));
 
         ASSERT(t->t_lwp != NULL);
         ASSERT(t->t_cid == syscid);
         ASSERT(t->t_cldata == NULL);
-        VERIFY3U(CL_CANEXIT(t, NULL), ==, 0);
-        VERIFY3U(CL_ENTERCLASS(t, sysdccid, &sdp, kcred, buf), ==, 0);
+        VERIFY0(CL_CANEXIT(t, NULL));
+        VERIFY0(CL_ENTERCLASS(t, sysdccid, &sdp, kcred, buf));
         CL_EXITCLASS(syscid, NULL);
 }