migration: Move migrate_use_events() to options.c

Once that we are there, we rename the function to migrate_events()
to be consistent with all other capabilities.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

migration/migration.c

@@ -353,7 +353,7 @@ void migration_incoming_state_destroy(void)
 
 static void migrate_generate_event(int new_state)
 {
-    if (migrate_use_events()) {
+    if (migrate_events()) {
         qapi_event_send_migration(new_state);
     }
 }
@@ -2558,15 +2558,6 @@ int migrate_decompress_threads(void)
     return s->parameters.decompress_threads;
 }
 
-bool migrate_use_events(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_EVENTS];
-}
-
 bool migrate_use_multifd(void)
 {
     MigrationState *s;

migration/migration.h

@@ -475,7 +475,6 @@ int migrate_compress_level(void);
 int migrate_compress_threads(void);
 int migrate_compress_wait_thread(void);
 int migrate_decompress_threads(void);
-bool migrate_use_events(void);
 
 /* Sending on the return path - generic and then for each message type */
 void migrate_send_rp_shut(MigrationIncomingState *mis,

migration/options.c

@@ -57,6 +57,15 @@ bool migrate_dirty_bitmaps(void)
     return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS];
 }
 
+bool migrate_events(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_EVENTS];
+}
+
 bool migrate_ignore_shared(void)
 {
     MigrationState *s;

migration/options.h

@@ -21,6 +21,7 @@ bool migrate_background_snapshot(void);
 bool migrate_colo(void);
 bool migrate_compress(void);
 bool migrate_dirty_bitmaps(void);
+bool migrate_events(void);
 bool migrate_ignore_shared(void);
 bool migrate_late_block_activate(void);
 bool migrate_pause_before_switchover(void);

migration/ram.c

@@ -1246,7 +1246,7 @@ static void migration_bitmap_sync(RAMState *rs)
         rs->num_dirty_pages_period = 0;
         rs->bytes_xfer_prev = stat64_get(&ram_counters.transferred);
     }
-    if (migrate_use_events()) {
+    if (migrate_events()) {
         uint64_t generation = stat64_get(&ram_counters.dirty_sync_count);
         qapi_event_send_migration_pass(generation);
     }