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

*** 55,65 ****
  static int
  dump_bytes(dmu_sendarg_t *dsp, void *buf, int len)
  {
          dsl_dataset_t *ds = dsp->dsa_os->os_dsl_dataset;
          ssize_t resid; /* have to get resid to get detailed errno */
!         ASSERT3U(len % 8, ==, 0);
  
          fletcher_4_incremental_native(buf, len, &dsp->dsa_zc);
          dsp->dsa_err = vn_rdwr(UIO_WRITE, dsp->dsa_vp,
              (caddr_t)buf, len,
              0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
--- 55,65 ----
  static int
  dump_bytes(dmu_sendarg_t *dsp, void *buf, int len)
  {
          dsl_dataset_t *ds = dsp->dsa_os->os_dsl_dataset;
          ssize_t resid; /* have to get resid to get detailed errno */
!         ASSERT0(len % 8);
  
          fletcher_4_incremental_native(buf, len, &dsp->dsa_zc);
          dsp->dsa_err = vn_rdwr(UIO_WRITE, dsp->dsa_vp,
              (caddr_t)buf, len,
              0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
*** 959,969 ****
  {
          void *rv;
          int done = 0;
  
          /* some things will require 8-byte alignment, so everything must */
!         ASSERT3U(len % 8, ==, 0);
  
          while (done < len) {
                  ssize_t resid;
  
                  ra->err = vn_rdwr(UIO_READ, ra->vp,
--- 959,969 ----
  {
          void *rv;
          int done = 0;
  
          /* some things will require 8-byte alignment, so everything must */
!         ASSERT0(len % 8);
  
          while (done < len) {
                  ssize_t resid;
  
                  ra->err = vn_rdwr(UIO_READ, ra->vp,
*** 1643,1653 ****
          mutex_exit(&ds->ds_recvlock);
          if (err == 0 && drc->drc_guid_to_ds_map != NULL)
                  (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
          dsl_dataset_disown(ds, dmu_recv_tag);
          myerr = dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
!         ASSERT3U(myerr, ==, 0);
          return (err);
  }
  
  static int
  dmu_recv_new_end(dmu_recv_cookie_t *drc)
--- 1643,1653 ----
          mutex_exit(&ds->ds_recvlock);
          if (err == 0 && drc->drc_guid_to_ds_map != NULL)
                  (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
          dsl_dataset_disown(ds, dmu_recv_tag);
          myerr = dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
!         ASSERT0(myerr);
          return (err);
  }
  
  static int
  dmu_recv_new_end(dmu_recv_cookie_t *drc)