On Thu, 28 Apr 2022 09:01:13 +0800 Xiaoming Ni <nixiaoming@xxxxxxxxxx> wrote: > > +#ifdef CONFIG_DEBUG_NOTIFIERS > > + { > > + char sym_name[KSYM_NAME_LEN]; > > + > > + pr_info("notifiers: registered %s()\n", > > + notifier_name(n, sym_name)); > > + } > > Duplicate Code. > > Is it better to use __func__ and %pS? > > pr_info("%s: %pS\n", __func__, n->notifier_call); > > > > +#endif Also, don't sprinkle #ifdef in C code. Instead: if (IS_ENABLED(CONFIG_DEBUG_NOTIFIERS)) pr_info("notifers: regsiter %ps()\n", n->notifer_call); Or define a print macro at the start of the C file that is a nop if it is not defined, and use the macro. -- Steve