diff --git a/hw/s390x/s390-stattrib.c b/hw/s390x/s390-stattrib.c
index 9eda1c3b2a..ee60b53da4 100644
--- a/hw/s390x/s390-stattrib.c
+++ b/hw/s390x/s390-stattrib.c
@@ -183,16 +183,14 @@ static int cmma_save_setup(QEMUFile *f, void *opaque)
 }
 
 static void cmma_save_pending(QEMUFile *f, void *opaque, uint64_t max_size,
-                              uint64_t *res_precopy_only,
-                              uint64_t *res_compatible,
-                              uint64_t *res_postcopy_only)
+                              uint64_t *res_precopy, uint64_t *res_postcopy)
 {
     S390StAttribState *sas = S390_STATTRIB(opaque);
     S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
     long long res = sac->get_dirtycount(sas);
 
     if (res >= 0) {
-        *res_precopy_only += res;
+        *res_precopy += res;
     }
 }
 
diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c
index 3de4252111..3423f113f0 100644
--- a/hw/vfio/migration.c
+++ b/hw/vfio/migration.c
@@ -458,9 +458,8 @@ static void vfio_save_cleanup(void *opaque)
 
 static void vfio_save_pending(QEMUFile *f, void *opaque,
                               uint64_t threshold_size,
-                              uint64_t *res_precopy_only,
-                              uint64_t *res_compatible,
-                              uint64_t *res_postcopy_only)
+                              uint64_t *res_precopy,
+                              uint64_t *res_postcopy)
 {
     VFIODevice *vbasedev = opaque;
     VFIOMigration *migration = vbasedev->migration;
@@ -471,10 +470,9 @@ static void vfio_save_pending(QEMUFile *f, void *opaque,
         return;
     }
 
-    *res_precopy_only += migration->pending_bytes;
+    *res_precopy += migration->pending_bytes;
 
-    trace_vfio_save_pending(vbasedev->name, *res_precopy_only,
-                            *res_postcopy_only, *res_compatible);
+    trace_vfio_save_pending(vbasedev->name, *res_precopy, *res_postcopy);
 }
 
 static int vfio_save_iterate(QEMUFile *f, void *opaque)
diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events
index 73dffe9e00..a21cbd2a56 100644
--- a/hw/vfio/trace-events
+++ b/hw/vfio/trace-events
@@ -157,7 +157,7 @@ vfio_save_cleanup(const char *name) " (%s)"
 vfio_save_buffer(const char *name, uint64_t data_offset, uint64_t data_size, uint64_t pending) " (%s) Offset 0x%"PRIx64" size 0x%"PRIx64" pending 0x%"PRIx64
 vfio_update_pending(const char *name, uint64_t pending) " (%s) pending 0x%"PRIx64
 vfio_save_device_config_state(const char *name) " (%s)"
-vfio_save_pending(const char *name, uint64_t precopy, uint64_t postcopy, uint64_t compatible) " (%s) precopy 0x%"PRIx64" postcopy 0x%"PRIx64" compatible 0x%"PRIx64
+vfio_save_pending(const char *name, uint64_t precopy, uint64_t postcopy) " (%s) precopy 0x%"PRIx64" postcopy 0x%"PRIx64
 vfio_save_iterate(const char *name, int data_size) " (%s) data_size %d"
 vfio_save_complete_precopy(const char *name) " (%s)"
 vfio_load_device_config_state(const char *name) " (%s)"
diff --git a/include/migration/register.h b/include/migration/register.h
index c1dcff0f90..1950fee6a8 100644
--- a/include/migration/register.h
+++ b/include/migration/register.h
@@ -48,18 +48,18 @@ typedef struct SaveVMHandlers {
     int (*save_setup)(QEMUFile *f, void *opaque);
     void (*save_live_pending)(QEMUFile *f, void *opaque,
                               uint64_t threshold_size,
-                              uint64_t *res_precopy_only,
-                              uint64_t *res_compatible,
-                              uint64_t *res_postcopy_only);
+                              uint64_t *rest_precopy,
+                              uint64_t *rest_postcopy);
     /* Note for save_live_pending:
-     * - res_precopy_only is for data which must be migrated in precopy phase
-     *     or in stopped state, in other words - before target vm start
-     * - res_compatible is for data which may be migrated in any phase
-     * - res_postcopy_only is for data which must be migrated in postcopy phase
-     *     or in stopped state, in other words - after source vm stop
+     * - res_precopy is for data which must be migrated in precopy
+     *     phase or in stopped state, in other words - before target
+     *     vm start
+     * - res_postcopy is for data which must be migrated in postcopy
+     *     phase or in stopped state, in other words - after source vm
+     *     stop
      *
-     * Sum of res_postcopy_only, res_compatible and res_postcopy_only is the
-     * whole amount of pending data.
+     * Sum of res_precopy and res_postcopy is the whole amount of
+     * pending data.
      */
 
 
diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c
index 9aba7d9c22..dfea546330 100644
--- a/migration/block-dirty-bitmap.c
+++ b/migration/block-dirty-bitmap.c
@@ -763,9 +763,8 @@ static int dirty_bitmap_save_complete(QEMUFile *f, void *opaque)
 
 static void dirty_bitmap_save_pending(QEMUFile *f, void *opaque,
                                       uint64_t max_size,
-                                      uint64_t *res_precopy_only,
-                                      uint64_t *res_compatible,
-                                      uint64_t *res_postcopy_only)
+                                      uint64_t *res_precopy,
+                                      uint64_t *res_postcopy)
 {
     DBMSaveState *s = &((DBMState *)opaque)->save;
     SaveBitmapState *dbms;
@@ -785,7 +784,7 @@ static void dirty_bitmap_save_pending(QEMUFile *f, void *opaque,
 
     trace_dirty_bitmap_save_pending(pending, max_size);
 
-    *res_postcopy_only += pending;
+    *res_postcopy += pending;
 }
 
 /* First occurrence of this bitmap. It should be created if doesn't exist */
diff --git a/migration/block.c b/migration/block.c
index 3577c815a9..4ae8f837b0 100644
--- a/migration/block.c
+++ b/migration/block.c
@@ -863,9 +863,8 @@ static int block_save_complete(QEMUFile *f, void *opaque)
 }
 
 static void block_save_pending(QEMUFile *f, void *opaque, uint64_t max_size,
-                               uint64_t *res_precopy_only,
-                               uint64_t *res_compatible,
-                               uint64_t *res_postcopy_only)
+                               uint64_t *res_precopy,
+                               uint64_t *res_postcopy)
 {
     /* Estimate pending number of bytes to send */
     uint64_t pending;
@@ -886,7 +885,7 @@ static void block_save_pending(QEMUFile *f, void *opaque, uint64_t max_size,
 
     trace_migration_block_save_pending(pending);
     /* We don't do postcopy */
-    *res_precopy_only += pending;
+    *res_precopy += pending;
 }
 
 static int block_load(QEMUFile *f, void *opaque, int version_id)
diff --git a/migration/migration.c b/migration/migration.c
index 739bb683f3..a4a18228c6 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -3735,15 +3735,14 @@ typedef enum {
  */
 static MigIterateState migration_iteration_run(MigrationState *s)
 {
-    uint64_t pending_size, pend_pre, pend_compat, pend_post;
+    uint64_t pending_size, pend_pre, pend_post;
     bool in_postcopy = s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE;
 
     qemu_savevm_state_pending(s->to_dst_file, s->threshold_size, &pend_pre,
-                              &pend_compat, &pend_post);
-    pending_size = pend_pre + pend_compat + pend_post;
+                              &pend_post);
+    pending_size = pend_pre + pend_post;
 
-    trace_migrate_pending(pending_size, s->threshold_size,
-                          pend_pre, pend_compat, pend_post);
+    trace_migrate_pending(pending_size, s->threshold_size, pend_pre, pend_post);
 
     if (pending_size && pending_size >= s->threshold_size) {
         /* Still a significant amount to transfer */
diff --git a/migration/ram.c b/migration/ram.c
index dc1de9ddbc..20167e1102 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -3435,9 +3435,7 @@ static int ram_save_complete(QEMUFile *f, void *opaque)
 }
 
 static void ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size,
-                             uint64_t *res_precopy_only,
-                             uint64_t *res_compatible,
-                             uint64_t *res_postcopy_only)
+                             uint64_t *res_precopy, uint64_t *res_postcopy)
 {
     RAMState **temp = opaque;
     RAMState *rs = *temp;
@@ -3457,9 +3455,9 @@ static void ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size,
 
     if (migrate_postcopy_ram()) {
         /* We can do postcopy, and all the data is postcopiable */
-        *res_compatible += remaining_size;
+        *res_postcopy += remaining_size;
     } else {
-        *res_precopy_only += remaining_size;
+        *res_precopy += remaining_size;
     }
 }
 
diff --git a/migration/savevm.c b/migration/savevm.c
index a0cdb714f7..4d02887f25 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1472,16 +1472,13 @@ flush:
  * for units that can't do postcopy.
  */
 void qemu_savevm_state_pending(QEMUFile *f, uint64_t threshold_size,
-                               uint64_t *res_precopy_only,
-                               uint64_t *res_compatible,
-                               uint64_t *res_postcopy_only)
+                               uint64_t *res_precopy,
+                               uint64_t *res_postcopy)
 {
     SaveStateEntry *se;
 
-    *res_precopy_only = 0;
-    *res_compatible = 0;
-    *res_postcopy_only = 0;
-
+    *res_precopy = 0;
+    *res_postcopy = 0;
 
     QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
         if (!se->ops || !se->ops->save_live_pending) {
@@ -1493,8 +1490,7 @@ void qemu_savevm_state_pending(QEMUFile *f, uint64_t threshold_size,
             }
         }
         se->ops->save_live_pending(f, se->opaque, threshold_size,
-                                   res_precopy_only, res_compatible,
-                                   res_postcopy_only);
+                                   res_precopy, res_postcopy);
     }
 }
 
diff --git a/migration/savevm.h b/migration/savevm.h
index 6461342cb4..9bd55c336c 100644
--- a/migration/savevm.h
+++ b/migration/savevm.h
@@ -41,9 +41,7 @@ void qemu_savevm_state_complete_postcopy(QEMUFile *f);
 int qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only,
                                        bool inactivate_disks);
 void qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size,
-                               uint64_t *res_precopy_only,
-                               uint64_t *res_compatible,
-                               uint64_t *res_postcopy_only);
+                               uint64_t *res_precopy, uint64_t *res_postcopy);
 void qemu_savevm_send_ping(QEMUFile *f, uint32_t value);
 void qemu_savevm_send_open_return_path(QEMUFile *f);
 int qemu_savevm_send_packaged(QEMUFile *f, const uint8_t *buf, size_t len);
diff --git a/migration/trace-events b/migration/trace-events
index 57003edcbd..f2a873fd6c 100644
--- a/migration/trace-events
+++ b/migration/trace-events
@@ -150,7 +150,7 @@ migrate_fd_cleanup(void) ""
 migrate_fd_error(const char *error_desc) "error=%s"
 migrate_fd_cancel(void) ""
 migrate_handle_rp_req_pages(const char *rbname, size_t start, size_t len) "in %s at 0x%zx len 0x%zx"
-migrate_pending(uint64_t size, uint64_t max, uint64_t pre, uint64_t compat, uint64_t post) "pending size %" PRIu64 " max %" PRIu64 " (pre = %" PRIu64 " compat=%" PRIu64 " post=%" PRIu64 ")"
+migrate_pending(uint64_t size, uint64_t max, uint64_t pre, uint64_t post) "pending size %" PRIu64 " max %" PRIu64 " (pre = %" PRIu64 " post=%" PRIu64 ")"
 migrate_send_rp_message(int msg_type, uint16_t len) "%d: len %d"
 migrate_send_rp_recv_bitmap(char *name, int64_t size) "block '%s' size 0x%"PRIi64
 migration_completion_file_err(void) ""
