migration: Unexport migration_is_active()

After being removed from VFIO and dirty limit, migration_is_active() no
longer has any users outside the migration subsystem, and in fact, it's
only used in migration.c.

Unexport it and also relocate it so it can be made static.

Signed-off-by: Avihai Horon <[email protected]>
Reviewed-by: Cédric Le Goater <[email protected]>
Acked-by: Peter Xu <[email protected]>
Tested-by: Joao Martins <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Cédric Le Goater <[email protected]>

Author: avihai1122

include/migration/misc.h

@@ -53,7 +53,6 @@ void dump_vmstate_json_to_file(FILE *out_fp);
 void migration_object_init(void);
 void migration_shutdown(void);
 
-bool migration_is_active(void);
 bool migration_is_running(void);
 bool migration_thread_is_self(void);
 

migration/migration.c

@@ -1139,6 +1139,14 @@ bool migration_is_running(void)
     }
 }
 
+static bool migration_is_active(void)
+{
+    MigrationState *s = current_migration;
+
+    return (s->state == MIGRATION_STATUS_ACTIVE ||
+            s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE);
+}
+
 static bool migrate_show_downtime(MigrationState *s)
 {
     return (s->state == MIGRATION_STATUS_COMPLETED) || migration_in_postcopy();
@@ -1637,14 +1645,6 @@ bool migration_in_bg_snapshot(void)
     return migrate_background_snapshot() && migration_is_running();
 }
 
-bool migration_is_active(void)
-{
-    MigrationState *s = current_migration;
-
-    return (s->state == MIGRATION_STATUS_ACTIVE ||
-            s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE);
-}
-
 bool migration_thread_is_self(void)
 {
     MigrationState *s = current_migration;