THREAD_FLAGS_64_BIT_SYSCALL_RETURN
atomic_or(&thread->flags, THREAD_FLAGS_64_BIT_SYSCALL_RETURN);
~(THREAD_FLAGS_RESTART_SYSCALL | THREAD_FLAGS_64_BIT_SYSCALL_RETURN));
& (THREAD_FLAGS_RESTART_SYSCALL | THREAD_FLAGS_64_BIT_SYSCALL_RETURN));
~(THREAD_FLAGS_RESTART_SYSCALL | THREAD_FLAGS_64_BIT_SYSCALL_RETURN));