perf stat: Move 'print_free_counters_hint' to 'struct perf_stat_config'

Move the 'print_free_counters_hint' variable to 'struct perf_stat_config',
so that it can be passed around and used outside the 'perf stat' command.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180830063252.23729-34-jolsa@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-stat.c

@@ -170,7 +170,6 @@ static bool			append_file;
 static bool			interval_count;
 static const char		*output_name;
 static int			output_fd;
-static int			print_free_counters_hint;
 static int			print_mixed_hw_group_error;
 static u64			*walltime_run;
 static bool			ru_display			= false;
@@ -1051,7 +1050,7 @@ static void printout(struct perf_stat_config *config, int id, int nr,
 			config->csv_sep);
 
 		if (counter->supported) {
-			print_free_counters_hint = 1;
+			config->print_free_counters_hint = 1;
 			if (is_mixed_hw_group(counter))
 				print_mixed_hw_group_error = 1;
 		}
@@ -1707,7 +1706,7 @@ static void print_footer(struct perf_stat_config *config)
 	}
 	fprintf(output, "\n\n");
 
-	if (print_free_counters_hint &&
+	if (config->print_free_counters_hint &&
 	    sysctl__read_int("kernel/nmi_watchdog", &n) >= 0 &&
 	    n > 0)
 		fprintf(output,

tools/perf/util/stat.h

@@ -103,6 +103,7 @@ struct perf_stat_config {
 	unsigned int		 metric_only_len;
 	int			 times;
 	int			 run_count;
+	int			 print_free_counters_hint;
 	struct runtime_stat	*stats;
 	int			 stats_num;
 	const char		*csv_sep;