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.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

41 files changed, 110 insertions, 126 deletions

diff --git a/tools/perf/bench/bench.h b/tools/perf/bench/bench.h
index 579a592990dd..842ab2781cdc 100644
--- a/tools/perf/bench/bench.h
+++ b/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
diff --git a/tools/perf/bench/futex-hash.c b/tools/perf/bench/futex-hash.c
index 2499e1b0c6fb..fe16b310097f 100644
--- a/tools/perf/bench/futex-hash.c
+++ b/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;
diff --git a/tools/perf/bench/futex-lock-pi.c b/tools/perf/bench/futex-lock-pi.c
index a20814d94af1..73a1c44ea63c 100644
--- a/tools/perf/bench/futex-lock-pi.c
+++ b/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;
diff --git a/tools/perf/bench/futex-requeue.c b/tools/perf/bench/futex-requeue.c
index 9fad1e4fcd3e..41786cbea24c 100644
--- a/tools/perf/bench/futex-requeue.c
+++ b/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;
diff --git a/tools/perf/bench/futex-wake-parallel.c b/tools/perf/bench/futex-wake-parallel.c
index 40f5fcf1d120..4ab12c8e016a 100644
--- a/tools/perf/bench/futex-wake-parallel.c
+++ b/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;
diff --git a/tools/perf/bench/futex-wake.c b/tools/perf/bench/futex-wake.c
index 789490281ae3..2fa49222ef8d 100644
--- a/tools/perf/bench/futex-wake.c
+++ b/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;
diff --git a/tools/perf/bench/mem-functions.c b/tools/perf/bench/mem-functions.c
index 52504a83b5a1..d1dea33dcfcf 100644
--- a/tools/perf/bench/mem-functions.c
+++ b/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,
diff --git a/tools/perf/bench/numa.c b/tools/perf/bench/numa.c
index 6bd0581de298..1fe43bd5a012 100644
--- a/tools/perf/bench/numa.c
+++ b/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);
diff --git a/tools/perf/bench/sched-messaging.c b/tools/perf/bench/sched-messaging.c
index 6a111e775210..4f961e74535b 100644
--- a/tools/perf/bench/sched-messaging.c
+++ b/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;
diff --git a/tools/perf/bench/sched-pipe.c b/tools/perf/bench/sched-pipe.c
index 2243f0150d76..a152737370c5 100644
--- a/tools/perf/bench/sched-pipe.c
+++ b/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];
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index e54b1f9fe1ee..56a7c8d210b9 100644
--- a/tools/perf/builtin-annotate.c
+++ b/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 = {
diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c
index a1cddc6bbf0f..445e62881254 100644
--- a/tools/perf/builtin-bench.c
+++ b/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;
                 }
 
diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index 30e2b2cb2421..94b55eee0d9b 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/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;
diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
index 5e914ee79eb3..26f4e608207f 100644
--- a/tools/perf/builtin-buildid-list.c
+++ b/tools/perf/builtin-buildid-list.c
@@ -87,8 +87,7 @@ out:
         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;
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 5cd6d7a047b9..70c2c773a2b8 100644
--- a/tools/perf/builtin-c2c.c
+++ b/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);
diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
index 8c0d93b7c2f0..55f04f85b049 100644
--- a/tools/perf/builtin-config.c
+++ b/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;
diff --git a/tools/perf/builtin-data.c b/tools/perf/builtin-data.c
index 7ad6e17ac6b3..0adb5f82335a 100644
--- a/tools/perf/builtin-data.c
+++ b/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);
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 5e4803158672..cd2605d86984 100644
--- a/tools/perf/builtin-diff.c
+++ b/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();
 
diff --git a/tools/perf/builtin-evlist.c b/tools/perf/builtin-evlist.c
index e09c4287fe87..6d210e40d611 100644
--- a/tools/perf/builtin-evlist.c
+++ b/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[] = {
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 6087295f8827..f80fb60b00b0 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/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 = {
diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c
index aed0d844e8c2..7ae238929e95 100644
--- a/tools/perf/builtin-help.c
+++ b/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;
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 8d1d13b9bab6..42dff0b1375a 100644
--- a/tools/perf/builtin-inject.c
+++ b/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 = {
diff --git a/tools/perf/builtin-kallsyms.c b/tools/perf/builtin-kallsyms.c
index 224bfc454b4a..8ff38c4eb2c0 100644
--- a/tools/perf/builtin-kallsyms.c
+++ b/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)"),
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index d509e74bc6e8..515587825af4 100644
--- a/tools/perf/builtin-kmem.c
+++ b/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";
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 18e6c38864bc..38b409173693 100644
--- a/tools/perf/builtin-kvm.c
+++ b/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
diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index be9195e95c78..4bf2cb4d25aa 100644
--- a/tools/perf/builtin-list.c
+++ b/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;
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index e992e7206993..b686fb6759da 100644
--- a/tools/perf/builtin-lock.c
+++ b/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,
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 030a6cfdda59..643f4faac0d0 100644
--- a/tools/perf/builtin-mem.c
+++ b/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 @@ error:
         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 = {
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 51cdc230f6ca..d7360c2bda13 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -468,7 +468,7 @@ out:
 
 
 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();
         }
 
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 04faef79a548..3191ab063852 100644
--- a/tools/perf/builtin-record.c
+++ b/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;
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 5ab8117c3bfd..3c8885a1c452 100644
--- a/tools/perf/builtin-report.c
+++ b/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, };
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index b92c4d97192c..79833e226789 100644
--- a/tools/perf/builtin-sched.c
+++ b/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);
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index c98e16689b57..46acc8ece41f 100644
--- a/tools/perf/builtin-script.c
+++ b/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"))) {
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 01b589e3c3a6..2158ea14da57 100644
--- a/tools/perf/builtin-stat.c
+++ b/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>]",
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index fbd7c6c695b8..fafdb44b8bcb 100644
--- a/tools/perf/builtin-timechart.c
+++ b/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 = {
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index ab9077915763..a0c97c70ec81 100644
--- a/tools/perf/builtin-top.c
+++ b/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 = {
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 60053d49539b..c88f9f215e6f 100644
--- a/tools/perf/builtin-trace.c
+++ b/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 @@ out:
         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>]",
diff --git a/tools/perf/builtin-version.c b/tools/perf/builtin-version.c
index 9b10cda6b6dc..b9a095b1db99 100644
--- a/tools/perf/builtin-version.c
+++ b/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;
diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h
index 036e1e35b1a8..26669bf9129c 100644
--- a/tools/perf/builtin.h
+++ b/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
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 6d5479e03e0d..4b283d18e158 100644
--- a/tools/perf/perf.c
+++ b/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");
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 86822969e8a8..e6d7876c94c2 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/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>]}]",