rtla: Tools main loop cleanup

I probably started using "do {} while();", but changed all but osnoise_top
to "while(){};" leaving the ; behind.

Cleanup the main loop code, making all tools use "while() {}"

Changcheng Deng reported this problem, as reported by coccicheck:

Fix the following coccicheck review:
./tools/tracing/rtla/src/timerlat_hist.c: 800: 2-3: Unneeded semicolon
./tools/tracing/rtla/src/osnoise_hist.c:  776: 2-3: Unneeded semicolon
./tools/tracing/rtla/src/timerlat_top.c:  596: 2-3: Unneeded semicolon

Link: https://lkml.kernel.org/r/3c1642110aa87c396f5da4a037dabc72dbb9c601.1646247211.git.bristot@kernel.org

Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Clark Williams <williams@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Reported-by: Changcheng Deng <deng.changcheng@zte.com.cn>
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

Author: Daniel Bristot de Oliveira

tools/tracing/rtla/src/osnoise_hist.c

@@ -850,7 +850,7 @@ int osnoise_hist_main(int argc, char *argv[])
 
 		if (trace_is_off(&tool->trace, &record->trace))
 			break;
-	};
+	}
 
 	osnoise_read_trace_hist(tool);
 

tools/tracing/rtla/src/osnoise_top.c

@@ -612,7 +612,7 @@ int osnoise_top_main(int argc, char **argv)
 	tool->start_time = time(NULL);
 	osnoise_top_set_signals(params);
 
-	do {
+	while (!stop_tracing) {
 		sleep(params->sleep_time);
 
 		retval = tracefs_iterate_raw_events(trace->tep,
@@ -632,7 +632,7 @@ int osnoise_top_main(int argc, char **argv)
 		if (trace_is_off(&tool->trace, &record->trace))
 			break;
 
-	} while (!stop_tracing);
+	}
 
 	osnoise_print_stats(params, tool);
 

tools/tracing/rtla/src/timerlat_hist.c

@@ -885,7 +885,7 @@ int timerlat_hist_main(int argc, char *argv[])
 
 		if (trace_is_off(&tool->trace, &record->trace))
 			break;
-	};
+	}
 
 	timerlat_print_stats(params, tool);
 

tools/tracing/rtla/src/timerlat_top.c

@@ -680,7 +680,7 @@ int timerlat_top_main(int argc, char *argv[])
 		if (trace_is_off(&top->trace, &record->trace))
 			break;
 
-	};
+	}
 
 	timerlat_print_stats(params, top);