[bug report] rcutorture: Perform more frequent testing of ->gpwrap

[Dan Carpenter]

Hello Joel Fernandes,

Commit bd57ec707441 ("rcutorture: Perform more frequent testing of
->gpwrap") from Feb 16, 2025 (linux-next), leads to the following
Smatch static checker warning:

        kernel/rcu/rcutorture.c:4586 rcu_torture_init()
        warn: missing error code 'firsterr'

kernel/rcu/rcutorture.c
    4576                 if (torture_init_error(firsterr))
    4577                         goto unwind;
    4578         }
    4579         if (object_debug)
    4580                 rcu_test_debug_objects();
    4581         torture_init_end();
    4582         if (cur_ops->gp_slow_register && 
!WARN_ON_ONCE(!cur_ops->gp_slow_unregister))
    4583                 cur_ops->gp_slow_register(&rcu_fwd_cb_nodelay);
    4584 
    4585         if (cur_ops->set_gpwrap_lag && rcu_gpwrap_lag_init())
--> 4586                 goto unwind;

set an error code?

    4587 
    4588         return 0;
    4589 
    4590 unwind:
    4591         torture_init_end();
    4592         rcu_torture_cleanup();
    4593         if (shutdown_secs) {
    4594                 WARN_ON(!IS_MODULE(CONFIG_RCU_TORTURE_TEST));
    4595                 kernel_power_off();
    4596         }
    4597         return firsterr;
    4598 }

regards,
dan carpenter