perf tools: Remove unused 'prefix' from builtin functions

We got it from the git sources but never used it for anything, with the
place where this would be somehow used remaining:

  static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
  {
	prefix = NULL;
	if (p->option & RUN_SETUP)
		prefix = NULL; /* setup_perf_directory(); */

Ditch it.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-uw5swz05vol0qpr32c5lpvus@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/bench/bench.h

@@ -25,17 +25,17 @@
 # endif
 #endif
 
-int bench_numa(int argc, const char **argv, const char *prefix);
-int bench_sched_messaging(int argc, const char **argv, const char *prefix);
-int bench_sched_pipe(int argc, const char **argv, const char *prefix);
-int bench_mem_memcpy(int argc, const char **argv, const char *prefix);
-int bench_mem_memset(int argc, const char **argv, const char *prefix);
-int bench_futex_hash(int argc, const char **argv, const char *prefix);
-int bench_futex_wake(int argc, const char **argv, const char *prefix);
-int bench_futex_wake_parallel(int argc, const char **argv, const char *prefix);
-int bench_futex_requeue(int argc, const char **argv, const char *prefix);
+int bench_numa(int argc, const char **argv);
+int bench_sched_messaging(int argc, const char **argv);
+int bench_sched_pipe(int argc, const char **argv);
+int bench_mem_memcpy(int argc, const char **argv);
+int bench_mem_memset(int argc, const char **argv);
+int bench_futex_hash(int argc, const char **argv);
+int bench_futex_wake(int argc, const char **argv);
+int bench_futex_wake_parallel(int argc, const char **argv);
+int bench_futex_requeue(int argc, const char **argv);
 /* pi futexes */
-int bench_futex_lock_pi(int argc, const char **argv, const char *prefix);
+int bench_futex_lock_pi(int argc, const char **argv);
 
 #define BENCH_FORMAT_DEFAULT_STR	"default"
 #define BENCH_FORMAT_DEFAULT		0

tools/perf/bench/futex-hash.c

@@ -114,8 +114,7 @@ static void print_summary(void)
 	       (int) runtime.tv_sec);
 }
 
-int bench_futex_hash(int argc, const char **argv,
-		     const char *prefix __maybe_unused)
+int bench_futex_hash(int argc, const char **argv)
 {
 	int ret = 0;
 	cpu_set_t cpu;

tools/perf/bench/futex-lock-pi.c

@@ -140,8 +140,7 @@ static void create_threads(struct worker *w, pthread_attr_t thread_attr)
 	}
 }
 
-int bench_futex_lock_pi(int argc, const char **argv,
-			const char *prefix __maybe_unused)
+int bench_futex_lock_pi(int argc, const char **argv)
 {
 	int ret = 0;
 	unsigned int i;

tools/perf/bench/futex-requeue.c

@@ -109,8 +109,7 @@ static void toggle_done(int sig __maybe_unused,
 	done = true;
 }
 
-int bench_futex_requeue(int argc, const char **argv,
-			const char *prefix __maybe_unused)
+int bench_futex_requeue(int argc, const char **argv)
 {
 	int ret = 0;
 	unsigned int i, j;

tools/perf/bench/futex-wake-parallel.c

@@ -197,8 +197,7 @@ static void toggle_done(int sig __maybe_unused,
 	done = true;
 }
 
-int bench_futex_wake_parallel(int argc, const char **argv,
-			      const char *prefix __maybe_unused)
+int bench_futex_wake_parallel(int argc, const char **argv)
 {
 	int ret = 0;
 	unsigned int i, j;

tools/perf/bench/futex-wake.c

@@ -115,8 +115,7 @@ static void toggle_done(int sig __maybe_unused,
 	done = true;
 }
 
-int bench_futex_wake(int argc, const char **argv,
-		     const char *prefix __maybe_unused)
+int bench_futex_wake(int argc, const char **argv)
 {
 	int ret = 0;
 	unsigned int i, j;

tools/perf/bench/mem-functions.c

@@ -284,7 +284,7 @@ static const char * const bench_mem_memcpy_usage[] = {
 	NULL
 };
 
-int bench_mem_memcpy(int argc, const char **argv, const char *prefix __maybe_unused)
+int bench_mem_memcpy(int argc, const char **argv)
 {
 	struct bench_mem_info info = {
 		.functions		= memcpy_functions,
@@ -358,7 +358,7 @@ static const struct function memset_functions[] = {
 	{ .name = NULL, }
 };
 
-int bench_mem_memset(int argc, const char **argv, const char *prefix __maybe_unused)
+int bench_mem_memset(int argc, const char **argv)
 {
 	struct bench_mem_info info = {
 		.functions		= memset_functions,

tools/perf/bench/numa.c

@@ -1767,7 +1767,7 @@ static int bench_all(void)
 	return 0;
 }
 
-int bench_numa(int argc, const char **argv, const char *prefix __maybe_unused)
+int bench_numa(int argc, const char **argv)
 {
 	init_params(&p0, "main,", argc, argv);
 	argc = parse_options(argc, argv, options, bench_numa_usage, 0);

tools/perf/bench/sched-messaging.c

@@ -260,8 +260,7 @@ static const char * const bench_sched_message_usage[] = {
 	NULL
 };
 
-int bench_sched_messaging(int argc, const char **argv,
-		    const char *prefix __maybe_unused)
+int bench_sched_messaging(int argc, const char **argv)
 {
 	unsigned int i, total_children;
 	struct timeval start, stop, diff;

tools/perf/bench/sched-pipe.c

@@ -76,7 +76,7 @@ static void *worker_thread(void *__tdata)
 	return NULL;
 }
 
-int bench_sched_pipe(int argc, const char **argv, const char *prefix __maybe_unused)
+int bench_sched_pipe(int argc, const char **argv)
 {
 	struct thread_data threads[2], *td;
 	int pipe_1[2], pipe_2[2];

tools/perf/builtin-annotate.c

@@ -383,7 +383,7 @@ static const char * const annotate_usage[] = {
 	NULL
 };
 
-int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_annotate(int argc, const char **argv)
 {
 	struct perf_annotate annotate = {
 		.tool = {

tools/perf/builtin-bench.c

@@ -25,7 +25,7 @@
 #include <string.h>
 #include <sys/prctl.h>
 
-typedef int (*bench_fn_t)(int argc, const char **argv, const char *prefix);
+typedef int (*bench_fn_t)(int argc, const char **argv);
 
 struct bench {
 	const char	*name;
@@ -155,7 +155,7 @@ static int bench_str2int(const char *str)
  * to something meaningful:
  */
 static int run_bench(const char *coll_name, const char *bench_name, bench_fn_t fn,
-		     int argc, const char **argv, const char *prefix)
+		     int argc, const char **argv)
 {
 	int size;
 	char *name;
@@ -171,7 +171,7 @@ static int run_bench(const char *coll_name, const char *bench_name, bench_fn_t f
 	prctl(PR_SET_NAME, name);
 	argv[0] = name;
 
-	ret = fn(argc, argv, prefix);
+	ret = fn(argc, argv);
 
 	free(name);
 
@@ -198,7 +198,7 @@ static void run_collection(struct collection *coll)
 		fflush(stdout);
 
 		argv[1] = bench->name;
-		run_bench(coll->name, bench->name, bench->fn, 1, argv, NULL);
+		run_bench(coll->name, bench->name, bench->fn, 1, argv);
 		printf("\n");
 	}
 }
@@ -211,7 +211,7 @@ static void run_all_collections(void)
 		run_collection(coll);
 }
 
-int cmd_bench(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_bench(int argc, const char **argv)
 {
 	struct collection *coll;
 	int ret = 0;
@@ -270,7 +270,7 @@ int cmd_bench(int argc, const char **argv, const char *prefix __maybe_unused)
 			if (bench_format == BENCH_FORMAT_DEFAULT)
 				printf("# Running '%s/%s' benchmark:\n", coll->name, bench->name);
 			fflush(stdout);
-			ret = run_bench(coll->name, bench->name, bench->fn, argc-1, argv+1, prefix);
+			ret = run_bench(coll->name, bench->name, bench->fn, argc-1, argv+1);
 			goto end;
 		}
 

tools/perf/builtin-buildid-cache.c

@@ -276,8 +276,7 @@ static int build_id_cache__update_file(const char *filename)
 	return err;
 }
 
-int cmd_buildid_cache(int argc, const char **argv,
-		      const char *prefix __maybe_unused)
+int cmd_buildid_cache(int argc, const char **argv)
 {
 	struct strlist *list;
 	struct str_node *pos;

tools/perf/builtin-buildid-list.c

@@ -87,8 +87,7 @@ static int perf_session__list_build_ids(bool force, bool with_hits)
 	return 0;
 }
 
-int cmd_buildid_list(int argc, const char **argv,
-		     const char *prefix __maybe_unused)
+int cmd_buildid_list(int argc, const char **argv)
 {
 	bool show_kernel = false;
 	bool with_hits = false;

tools/perf/builtin-c2c.c

@@ -2755,12 +2755,12 @@ static int perf_c2c__record(int argc, const char **argv)
 		pr_debug("\n");
 	}
 
-	ret = cmd_record(i, rec_argv, NULL);
+	ret = cmd_record(i, rec_argv);
 	free(rec_argv);
 	return ret;
 }
 
-int cmd_c2c(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_c2c(int argc, const char **argv)
 {
 	argc = parse_options(argc, argv, c2c_options, c2c_usage,
 			     PARSE_OPT_STOP_AT_NON_OPTION);

tools/perf/builtin-config.c

@@ -154,7 +154,7 @@ static int parse_config_arg(char *arg, char **var, char **value)
 	return 0;
 }
 
-int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_config(int argc, const char **argv)
 {
 	int i, ret = 0;
 	struct perf_config_set *set;

tools/perf/builtin-data.c

@@ -6,7 +6,7 @@
 #include "data-convert.h"
 #include "data-convert-bt.h"
 
-typedef int (*data_cmd_fn_t)(int argc, const char **argv, const char *prefix);
+typedef int (*data_cmd_fn_t)(int argc, const char **argv);
 
 struct data_cmd {
 	const char	*name;
@@ -50,8 +50,7 @@ static const char * const data_convert_usage[] = {
 	NULL
 };
 
-static int cmd_data_convert(int argc, const char **argv,
-			    const char *prefix __maybe_unused)
+static int cmd_data_convert(int argc, const char **argv)
 {
 	const char *to_ctf     = NULL;
 	struct perf_data_convert_opts opts = {
@@ -98,7 +97,7 @@ static struct data_cmd data_cmds[] = {
 	{ .name = NULL, },
 };
 
-int cmd_data(int argc, const char **argv, const char *prefix)
+int cmd_data(int argc, const char **argv)
 {
 	struct data_cmd *cmd;
 	const char *cmdstr;
@@ -118,7 +117,7 @@ int cmd_data(int argc, const char **argv, const char *prefix)
 		if (strcmp(cmd->name, cmdstr))
 			continue;
 
-		return cmd->fn(argc, argv, prefix);
+		return cmd->fn(argc, argv);
 	}
 
 	pr_err("Unknown command: %s\n", cmdstr);

tools/perf/builtin-diff.c

@@ -1321,7 +1321,7 @@ static int diff__config(const char *var, const char *value,
 	return 0;
 }
 
-int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_diff(int argc, const char **argv)
 {
 	int ret = hists__init();
 

tools/perf/builtin-evlist.c

@@ -46,7 +46,7 @@ static int __cmd_evlist(const char *file_name, struct perf_attr_details *details
 	return 0;
 }
 
-int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_evlist(int argc, const char **argv)
 {
 	struct perf_attr_details details = { .verbose = false, };
 	const struct option options[] = {

tools/perf/builtin-ftrace.c

@@ -304,7 +304,7 @@ static int perf_ftrace_config(const char *var, const char *value, void *cb)
 	return -1;
 }
 
-int cmd_ftrace(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_ftrace(int argc, const char **argv)
 {
 	int ret;
 	struct perf_ftrace ftrace = {

tools/perf/builtin-help.c

@@ -418,7 +418,7 @@ static int show_html_page(const char *perf_cmd)
 	return 0;
 }
 
-int cmd_help(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_help(int argc, const char **argv)
 {
 	bool show_all = false;
 	enum help_format help_format = HELP_FORMAT_MAN;

tools/perf/builtin-inject.c

@@ -738,7 +738,7 @@ static int __cmd_inject(struct perf_inject *inject)
 	return ret;
 }
 
-int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_inject(int argc, const char **argv)
 {
 	struct perf_inject inject = {
 		.tool = {

tools/perf/builtin-kallsyms.c

@@ -43,7 +43,7 @@ static int __cmd_kallsyms(int argc, const char **argv)
 	return 0;
 }
 
-int cmd_kallsyms(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_kallsyms(int argc, const char **argv)
 {
 	const struct option options[] = {
 	OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"),

tools/perf/builtin-kmem.c

@@ -1866,7 +1866,7 @@ static int __cmd_record(int argc, const char **argv)
 	for (j = 1; j < (unsigned int)argc; j++, i++)
 		rec_argv[i] = argv[j];
 
-	return cmd_record(i, rec_argv, NULL);
+	return cmd_record(i, rec_argv);
 }
 
 static int kmem_config(const char *var, const char *value, void *cb __maybe_unused)
@@ -1885,7 +1885,7 @@ static int kmem_config(const char *var, const char *value, void *cb __maybe_unus
 	return 0;
 }
 
-int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_kmem(int argc, const char **argv)
 {
 	const char * const default_slab_sort = "frag,hit,bytes";
 	const char * const default_page_sort = "bytes,hit";

tools/perf/builtin-kvm.c

@@ -1209,7 +1209,7 @@ kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
 	set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
 
 	record_usage = kvm_stat_record_usage;
-	return cmd_record(i, rec_argv, NULL);
+	return cmd_record(i, rec_argv);
 }
 
 static int
@@ -1477,7 +1477,7 @@ static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
 #endif
 
 perf_stat:
-	return cmd_stat(argc, argv, NULL);
+	return cmd_stat(argc, argv);
 }
 #endif /* HAVE_KVM_STAT_SUPPORT */
 
@@ -1496,7 +1496,7 @@ static int __cmd_record(const char *file_name, int argc, const char **argv)
 
 	BUG_ON(i != rec_argc);
 
-	return cmd_record(i, rec_argv, NULL);
+	return cmd_record(i, rec_argv);
 }
 
 static int __cmd_report(const char *file_name, int argc, const char **argv)
@@ -1514,7 +1514,7 @@ static int __cmd_report(const char *file_name, int argc, const char **argv)
 
 	BUG_ON(i != rec_argc);
 
-	return cmd_report(i, rec_argv, NULL);
+	return cmd_report(i, rec_argv);
 }
 
 static int
@@ -1533,10 +1533,10 @@ __cmd_buildid_list(const char *file_name, int argc, const char **argv)
 
 	BUG_ON(i != rec_argc);
 
-	return cmd_buildid_list(i, rec_argv, NULL);
+	return cmd_buildid_list(i, rec_argv);
 }
 
-int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_kvm(int argc, const char **argv)
 {
 	const char *file_name = NULL;
 	const struct option kvm_options[] = {
@@ -1591,9 +1591,9 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
 	else if (!strncmp(argv[0], "rep", 3))
 		return __cmd_report(file_name, argc, argv);
 	else if (!strncmp(argv[0], "diff", 4))
-		return cmd_diff(argc, argv, NULL);
+		return cmd_diff(argc, argv);
 	else if (!strncmp(argv[0], "top", 3))
-		return cmd_top(argc, argv, NULL);
+		return cmd_top(argc, argv);
 	else if (!strncmp(argv[0], "buildid-list", 12))
 		return __cmd_buildid_list(file_name, argc, argv);
 #ifdef HAVE_KVM_STAT_SUPPORT

tools/perf/builtin-list.c

@@ -20,7 +20,7 @@
 static bool desc_flag = true;
 static bool details_flag;
 
-int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_list(int argc, const char **argv)
 {
 	int i;
 	bool raw_dump = false;

tools/perf/builtin-lock.c

@@ -941,12 +941,12 @@ static int __cmd_record(int argc, const char **argv)
 
 	BUG_ON(i != rec_argc);
 
-	ret = cmd_record(i, rec_argv, NULL);
+	ret = cmd_record(i, rec_argv);
 	free(rec_argv);
 	return ret;
 }
 
-int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_lock(int argc, const char **argv)
 {
 	const struct option lock_options[] = {
 	OPT_STRING('i', "input", &input_name, "file", "input file name"),
@@ -1009,7 +1009,7 @@ int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused)
 		rc = __cmd_report(false);
 	} else if (!strcmp(argv[0], "script")) {
 		/* Aliased to 'perf script' */
-		return cmd_script(argc, argv, prefix);
+		return cmd_script(argc, argv);
 	} else if (!strcmp(argv[0], "info")) {
 		if (argc) {
 			argc = parse_options(argc, argv,

tools/perf/builtin-mem.c

@@ -129,7 +129,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
 		pr_debug("\n");
 	}
 
-	ret = cmd_record(i, rec_argv, NULL);
+	ret = cmd_record(i, rec_argv);
 	free(rec_argv);
 	return ret;
 }
@@ -256,7 +256,7 @@ static int report_events(int argc, const char **argv, struct perf_mem *mem)
 	for (j = 1; j < argc; j++, i++)
 		rep_argv[i] = argv[j];
 
-	ret = cmd_report(i, rep_argv, NULL);
+	ret = cmd_report(i, rep_argv);
 	free(rep_argv);
 	return ret;
 }
@@ -330,7 +330,7 @@ parse_mem_ops(const struct option *opt, const char *str, int unset)
 	return ret;
 }
 
-int cmd_mem(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_mem(int argc, const char **argv)
 {
 	struct stat st;
 	struct perf_mem mem = {

tools/perf/builtin-probe.c

@@ -468,7 +468,7 @@ static int perf_del_probe_events(struct strfilter *filter)
 
 
 static int
-__cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
+__cmd_probe(int argc, const char **argv)
 {
 	const char * const probe_usage[] = {
 		"perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
@@ -687,13 +687,13 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
 	return 0;
 }
 
-int cmd_probe(int argc, const char **argv, const char *prefix)
+int cmd_probe(int argc, const char **argv)
 {
 	int ret;
 
 	ret = init_params();
 	if (!ret) {
-		ret = __cmd_probe(argc, argv, prefix);
+		ret = __cmd_probe(argc, argv);
 		cleanup_params();
 	}
 

tools/perf/builtin-record.c

@@ -1667,7 +1667,7 @@ static struct option __record_options[] = {
 
 struct option *record_options = __record_options;
 
-int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_record(int argc, const char **argv)
 {
 	int err;
 	struct record *rec = &record;

tools/perf/builtin-report.c

@@ -681,7 +681,7 @@ const char report_callchain_help[] = "Display call graph (stack chain/backtrace)
 				     CALLCHAIN_REPORT_HELP
 				     "\n\t\t\t\tDefault: " CALLCHAIN_DEFAULT_OPT;
 
-int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_report(int argc, const char **argv)
 {
 	struct perf_session *session;
 	struct itrace_synth_opts itrace_synth_opts = { .set = 0, };

tools/perf/builtin-sched.c

@@ -3272,10 +3272,10 @@ static int __cmd_record(int argc, const char **argv)
 
 	BUG_ON(i != rec_argc);
 
-	return cmd_record(i, rec_argv, NULL);
+	return cmd_record(i, rec_argv);
 }
 
-int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_sched(int argc, const char **argv)
 {
 	const char default_sort_order[] = "avg, max, switch, runtime";
 	struct perf_sched sched = {
@@ -3412,7 +3412,7 @@ int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
 	 * Aliased to 'perf script' for now:
 	 */
 	if (!strcmp(argv[0], "script"))
-		return cmd_script(argc, argv, prefix);
+		return cmd_script(argc, argv);
 
 	if (!strncmp(argv[0], "rec", 3)) {
 		return __cmd_record(argc, argv);

tools/perf/builtin-script.c

@@ -2359,7 +2359,7 @@ int process_cpu_map_event(struct perf_tool *tool __maybe_unused,
 	return set_maps(script);
 }
 
-int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_script(int argc, const char **argv)
 {
 	bool show_full_info = false;
 	bool header = false;
@@ -2504,7 +2504,7 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
 	if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
 		rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
 		if (!rec_script_path)
-			return cmd_record(argc, argv, NULL);
+			return cmd_record(argc, argv);
 	}
 
 	if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {

tools/perf/builtin-stat.c

@@ -2478,7 +2478,7 @@ static void setup_system_wide(int forks)
 	}
 }
 
-int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_stat(int argc, const char **argv)
 {
 	const char * const stat_usage[] = {
 		"perf stat [<options>] [<command>]",

tools/perf/builtin-timechart.c

@@ -1773,7 +1773,7 @@ static int timechart__io_record(int argc, const char **argv)
 	for (i = 0; i < (unsigned int)argc; i++)
 		*p++ = argv[i];
 
-	return cmd_record(rec_argc, rec_argv, NULL);
+	return cmd_record(rec_argc, rec_argv);
 }
 
 
@@ -1864,7 +1864,7 @@ static int timechart__record(struct timechart *tchart, int argc, const char **ar
 	for (j = 0; j < (unsigned int)argc; j++)
 		*p++ = argv[j];
 
-	return cmd_record(rec_argc, rec_argv, NULL);
+	return cmd_record(rec_argc, rec_argv);
 }
 
 static int
@@ -1917,8 +1917,7 @@ parse_time(const struct option *opt, const char *arg, int __maybe_unused unset)
 	return 0;
 }
 
-int cmd_timechart(int argc, const char **argv,
-		  const char *prefix __maybe_unused)
+int cmd_timechart(int argc, const char **argv)
 {
 	struct timechart tchart = {
 		.tool = {

tools/perf/builtin-top.c

@@ -1075,7 +1075,7 @@ parse_percent_limit(const struct option *opt, const char *arg,
 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
 	"\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
 
-int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_top(int argc, const char **argv)
 {
 	char errbuf[BUFSIZ];
 	struct perf_top top = {

tools/perf/builtin-trace.c

@@ -1993,7 +1993,7 @@ static int trace__record(struct trace *trace, int argc, const char **argv)
 	for (i = 0; i < (unsigned int)argc; i++)
 		rec_argv[j++] = argv[i];
 
-	return cmd_record(j, rec_argv, NULL);
+	return cmd_record(j, rec_argv);
 }
 
 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
@@ -2791,7 +2791,7 @@ static int trace__parse_events_option(const struct option *opt, const char *str,
 	return err;
 }
 
-int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_trace(int argc, const char **argv)
 {
 	const char *trace_usage[] = {
 		"perf trace [<options>] [<command>]",

tools/perf/builtin-version.c

@@ -2,8 +2,7 @@
 #include "builtin.h"
 #include "perf.h"
 
-int cmd_version(int argc __maybe_unused, const char **argv __maybe_unused,
-		const char *prefix __maybe_unused)
+int cmd_version(int argc __maybe_unused, const char **argv __maybe_unused)
 {
 	printf("perf version %s\n", perf_version_string);
 	return 0;

tools/perf/builtin.h

@@ -13,35 +13,35 @@ void prune_packed_objects(int);
 int read_line_with_nul(char *buf, int size, FILE *file);
 int check_pager_config(const char *cmd);
 
-int cmd_annotate(int argc, const char **argv, const char *prefix);
-int cmd_bench(int argc, const char **argv, const char *prefix);
-int cmd_buildid_cache(int argc, const char **argv, const char *prefix);
-int cmd_buildid_list(int argc, const char **argv, const char *prefix);
-int cmd_config(int argc, const char **argv, const char *prefix);
-int cmd_c2c(int argc, const char **argv, const char *prefix);
-int cmd_diff(int argc, const char **argv, const char *prefix);
-int cmd_evlist(int argc, const char **argv, const char *prefix);
-int cmd_help(int argc, const char **argv, const char *prefix);
-int cmd_sched(int argc, const char **argv, const char *prefix);
-int cmd_kallsyms(int argc, const char **argv, const char *prefix);
-int cmd_list(int argc, const char **argv, const char *prefix);
-int cmd_record(int argc, const char **argv, const char *prefix);
-int cmd_report(int argc, const char **argv, const char *prefix);
-int cmd_stat(int argc, const char **argv, const char *prefix);
-int cmd_timechart(int argc, const char **argv, const char *prefix);
-int cmd_top(int argc, const char **argv, const char *prefix);
-int cmd_script(int argc, const char **argv, const char *prefix);
-int cmd_version(int argc, const char **argv, const char *prefix);
-int cmd_probe(int argc, const char **argv, const char *prefix);
-int cmd_kmem(int argc, const char **argv, const char *prefix);
-int cmd_lock(int argc, const char **argv, const char *prefix);
-int cmd_kvm(int argc, const char **argv, const char *prefix);
-int cmd_test(int argc, const char **argv, const char *prefix);
-int cmd_trace(int argc, const char **argv, const char *prefix);
-int cmd_inject(int argc, const char **argv, const char *prefix);
-int cmd_mem(int argc, const char **argv, const char *prefix);
-int cmd_data(int argc, const char **argv, const char *prefix);
-int cmd_ftrace(int argc, const char **argv, const char *prefix);
+int cmd_annotate(int argc, const char **argv);
+int cmd_bench(int argc, const char **argv);
+int cmd_buildid_cache(int argc, const char **argv);
+int cmd_buildid_list(int argc, const char **argv);
+int cmd_config(int argc, const char **argv);
+int cmd_c2c(int argc, const char **argv);
+int cmd_diff(int argc, const char **argv);
+int cmd_evlist(int argc, const char **argv);
+int cmd_help(int argc, const char **argv);
+int cmd_sched(int argc, const char **argv);
+int cmd_kallsyms(int argc, const char **argv);
+int cmd_list(int argc, const char **argv);
+int cmd_record(int argc, const char **argv);
+int cmd_report(int argc, const char **argv);
+int cmd_stat(int argc, const char **argv);
+int cmd_timechart(int argc, const char **argv);
+int cmd_top(int argc, const char **argv);
+int cmd_script(int argc, const char **argv);
+int cmd_version(int argc, const char **argv);
+int cmd_probe(int argc, const char **argv);
+int cmd_kmem(int argc, const char **argv);
+int cmd_lock(int argc, const char **argv);
+int cmd_kvm(int argc, const char **argv);
+int cmd_test(int argc, const char **argv);
+int cmd_trace(int argc, const char **argv);
+int cmd_inject(int argc, const char **argv);
+int cmd_mem(int argc, const char **argv);
+int cmd_data(int argc, const char **argv);
+int cmd_ftrace(int argc, const char **argv);
 
 int find_scripts(char **scripts_array, char **scripts_path_array);
 #endif

tools/perf/perf.c

@@ -34,7 +34,7 @@ const char *input_name;
 
 struct cmd_struct {
 	const char *cmd;
-	int (*fn)(int, const char **, const char *);
+	int (*fn)(int, const char **);
 	int option;
 };
 
@@ -339,13 +339,8 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
 {
 	int status;
 	struct stat st;
-	const char *prefix;
 	char sbuf[STRERR_BUFSIZE];
 
-	prefix = NULL;
-	if (p->option & RUN_SETUP)
-		prefix = NULL; /* setup_perf_directory(); */
-
 	if (use_browser == -1)
 		use_browser = check_browser_config(p->cmd);
 
@@ -356,7 +351,7 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
 	commit_pager_choice();
 
 	perf_env__set_cmdline(&perf_env, argc, argv);
-	status = p->fn(argc, argv, prefix);
+	status = p->fn(argc, argv);
 	perf_config__exit();
 	exit_browser(status);
 	perf_env__exit(&perf_env);
@@ -566,7 +561,7 @@ int main(int argc, const char **argv)
 #ifdef HAVE_LIBAUDIT_SUPPORT
 		setup_path();
 		argv[0] = "trace";
-		return cmd_trace(argc, argv, NULL);
+		return cmd_trace(argc, argv);
 #else
 		fprintf(stderr,
 			"trace command not available: missing audit-libs devel package at build time.\n");

tools/perf/tests/builtin-test.c

@@ -464,7 +464,7 @@ static int perf_test__list(int argc, const char **argv)
 	return 0;
 }
 
-int cmd_test(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_test(int argc, const char **argv)
 {
 	const char *test_usage[] = {
 	"perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",