linux-kernel - kernel/trace/trace_eprobe.c:777:4: warning: Consecutive return, break, continue, goto or throw statements are unnecessary. [duplicateBreak]

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Message-ID: <7ca30935-f46c-41c7-b784-b3416a2f9234@intel.com>
Date:   Wed, 9 Mar 2022 14:42:39 +0800
From:   kernel test robot <yujie.liu@...el.com>
To:     "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@...il.com>
CC:     <kbuild-all@...ts.01.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>
Subject: kernel/trace/trace_eprobe.c:777:4: warning: Consecutive return,
 break, continue, goto or throw statements are unnecessary. [duplicateBreak]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   23d04328444a8fa0ca060c5e532220dac8e8bc26
commit: 7491e2c442781a1860181adb5ab472a52075f393 tracing: Add a probe that attaches to trace events
date:   6 months ago
compiler: riscv32-linux-gcc (GCC) 11.2.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <yujie.liu@...el.com>


cppcheck possible warnings: (new ones prefixed by >>, may not be real problems)

 >> kernel/trace/trace_eprobe.c:777:4: warning: Consecutive return, break, continue, goto or throw statements are unnecessary. [duplicateBreak]
       break;
       ^
    kernel/trace/trace_eprobe.c:780:3: warning: Consecutive return, break, continue, goto or throw statements are unnecessary. [duplicateBreak]
      break;
      ^

vim +777 kernel/trace/trace_eprobe.c

7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  754)
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  755) static struct trace_event_call *
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  756) find_and_get_event(const char *system, const char *event_name)
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  757) {
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  758) 	struct trace_event_call *tp_event;
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  759) 	const char *name;
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  760)
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  761) 	list_for_each_entry(tp_event, &ftrace_events, list) {
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  762) 		/* Skip other probes and ftrace events */
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  763) 		if (tp_event->flags &
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  764) 		    (TRACE_EVENT_FL_IGNORE_ENABLE |
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  765) 		     TRACE_EVENT_FL_KPROBE |
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  766) 		     TRACE_EVENT_FL_UPROBE |
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  767) 		     TRACE_EVENT_FL_EPROBE))
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  768) 			continue;
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  769) 		if (!tp_event->class->system ||
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  770) 		    strcmp(system, tp_event->class->system))
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  771) 			continue;
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  772) 		name = trace_event_name(tp_event);
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  773) 		if (!name || strcmp(event_name, name))
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  774) 			continue;
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  775) 		if (!trace_event_try_get_ref(tp_event)) {
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  776) 			return NULL;
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19 @777) 			break;
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  778) 		}
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  779) 		return tp_event;
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19 @780) 		break;
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  781) 	}
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  782) 	return NULL;
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  783) }
7491e2c442781a Tzvetomir Stoyanov (VMware  2021-08-19  784)

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