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

@@ -2954,11 +2954,11 @@
                     spa->spa_feat_for_read_obj);
                     zap_cursor_retrieve(&zc, &za) == 0;
                     zap_cursor_advance(&zc)) {
                         ASSERT(za.za_integer_length == sizeof (uint64_t) &&
                             za.za_num_integers == 1);
-                        VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name,
+                        VERIFY0(nvlist_add_uint64(features, za.za_name,
                             za.za_first_integer));
                 }
                 zap_cursor_fini(&zc);
         }
 

@@ -2967,11 +2967,11 @@
                     spa->spa_feat_for_write_obj);
                     zap_cursor_retrieve(&zc, &za) == 0;
                     zap_cursor_advance(&zc)) {
                         ASSERT(za.za_integer_length == sizeof (uint64_t) &&
                             za.za_num_integers == 1);
-                        VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name,
+                        VERIFY0(nvlist_add_uint64(features, za.za_name,
                             za.za_first_integer));
                 }
                 zap_cursor_fini(&zc);
         }
 

@@ -3408,11 +3408,11 @@
         if (zap_add(spa->spa_meta_objset,
             DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ,
             sizeof (uint64_t), 1, &obj, tx) != 0) {
                 cmn_err(CE_PANIC, "failed to add bpobj");
         }
-        VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj,
+        VERIFY0(bpobj_open(&spa->spa_deferred_bpobj,
             spa->spa_meta_objset, obj));
 
         /*
          * Create the pool's history object.
          */

@@ -4983,11 +4983,11 @@
 
         /*
          * The evacuation succeeded.  Remove any remaining MOS metadata
          * associated with this vdev, and wait for these changes to sync.
          */
-        ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0);
+        ASSERT0(vd->vdev_stat.vs_alloc);
         txg = spa_vdev_config_enter(spa);
         vd->vdev_removing = B_TRUE;
         vdev_dirty(vd, 0, NULL, txg);
         vdev_config_dirty(vd);
         spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);

@@ -5730,11 +5730,11 @@
                          * We checked this earlier in spa_prop_validate().
                          */
                         ASSERT(zpool_prop_feature(nvpair_name(elem)));
 
                         fname = strchr(nvpair_name(elem), '@') + 1;
-                        VERIFY3U(0, ==, zfeature_lookup_name(fname, &feature));
+                        VERIFY0(zfeature_lookup_name(fname, &feature));
 
                         spa_feature_enable(spa, feature, tx);
                         spa_history_log_internal(spa, "set", tx,
                             "%s=enabled", nvpair_name(elem));
                         break;

@@ -5975,11 +5975,11 @@
             ((dsl_scan_active(dp->dp_scan) ||
             txg_sync_waiting(dp)) && !spa_shutting_down(spa))) {
                 zio_t *zio = zio_root(spa, NULL, NULL, 0);
                 VERIFY3U(bpobj_iterate(defer_bpo,
                     spa_free_sync_cb, zio, tx), ==, 0);
-                VERIFY3U(zio_wait(zio), ==, 0);
+                VERIFY0(zio_wait(zio));
         }
 
         /*
          * Iterate to convergence.
          */