--- a/drivers/mtd/mtdcore.c~mtd-call-bdi_unregister-explicitly +++ a/drivers/mtd/mtdcore.c @@ -2409,6 +2409,7 @@ static void __exit cleanup_mtd(void) if (proc_mtd) remove_proc_entry("mtd", NULL); class_unregister(&mtd_class); + bdi_unregister(mtd_bdi); bdi_put(mtd_bdi); idr_destroy(&mtd_idr); }