perf tools: Use __maybe_used for unused variables

perf defines both __used and __unused variables to use for marking
unused variables. The variable __used is defined to
__attribute__((__unused__)), which contradicts the kernel definition to
__attribute__((__used__)) for new gcc versions. On Android, __used is
also defined in system headers and this leads to warnings like: warning:
'__used__' attribute ignored

__unused is not defined in the kernel and is not a standard definition.
If __unused is included everywhere instead of __used, this leads to
conflicts with glibc headers, since glibc has a variables with this name
in its headers.

The best approach is to use __maybe_unused, the definition used in the
kernel for __attribute__((unused)). In this way there is only one
definition in perf sources (instead of 2 definitions that point to the
same thing: __used and __unused) and it works on both Linux and Android.
This patch simply replaces all instances of __used and __unused with
__maybe_unused.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1347315303-29906-7-git-send-email-irina.tirdea@intel.com
[ committer note: fixed up conflict with a116e05 in builtin-sched.c ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

74 files changed, 491 insertions, 413 deletions

diff --git a/tools/perf/bench/bench.h b/tools/perf/bench/bench.h
index a09bece6dad2..8f89998eeaf4 100644
--- a/tools/perf/bench/bench.h
+++ b/tools/perf/bench/bench.h
@@ -3,7 +3,8 @@
 
 extern int bench_sched_messaging(int argc, const char **argv, const char *prefix);
 extern int bench_sched_pipe(int argc, const char **argv, const char *prefix);
-extern int bench_mem_memcpy(int argc, const char **argv, const char *prefix __used);
+extern int bench_mem_memcpy(int argc, const char **argv,
+                            const char *prefix __maybe_unused);
 extern int bench_mem_memset(int argc, const char **argv, const char *prefix);
 
 #define BENCH_FORMAT_DEFAULT_STR        "default"
diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
index 02dad5d3359b..93c83e3cb4a7 100644
--- a/tools/perf/bench/mem-memcpy.c
+++ b/tools/perf/bench/mem-memcpy.c
@@ -177,7 +177,7 @@ static double do_memcpy_gettimeofday(memcpy_t fn, size_t len, bool prefault)
         } while (0)
 
 int bench_mem_memcpy(int argc, const char **argv,
-                     const char *prefix __used)
+                     const char *prefix __maybe_unused)
 {
         int i;
         size_t len;
diff --git a/tools/perf/bench/mem-memset.c b/tools/perf/bench/mem-memset.c
index 350cc9557265..c6e4bc523492 100644
--- a/tools/perf/bench/mem-memset.c
+++ b/tools/perf/bench/mem-memset.c
@@ -171,7 +171,7 @@ static double do_memset_gettimeofday(memset_t fn, size_t len, bool prefault)
         } while (0)
 
 int bench_mem_memset(int argc, const char **argv,
-                     const char *prefix __used)
+                     const char *prefix __maybe_unused)
 {
         int i;
         size_t len;
diff --git a/tools/perf/bench/sched-messaging.c b/tools/perf/bench/sched-messaging.c
index d1d1b30f99c1..cc1190a0849b 100644
--- a/tools/perf/bench/sched-messaging.c
+++ b/tools/perf/bench/sched-messaging.c
@@ -267,7 +267,7 @@ static const char * const bench_sched_message_usage[] = {
 };
 
 int bench_sched_messaging(int argc, const char **argv,
-                    const char *prefix __used)
+                    const char *prefix __maybe_unused)
 {
         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 15911e9c587a..69cfba8d4c6c 100644
--- a/tools/perf/bench/sched-pipe.c
+++ b/tools/perf/bench/sched-pipe.c
@@ -43,7 +43,7 @@ static const char * const bench_sched_pipe_usage[] = {
 };
 
 int bench_sched_pipe(int argc, const char **argv,
-                     const char *prefix __used)
+                     const char *prefix __maybe_unused)
 {
         int pipe_1[2], pipe_2[2];
         int m = 0, i;
@@ -55,8 +55,8 @@ int bench_sched_pipe(int argc, const char **argv,
          * discarding returned value of read(), write()
          * causes error in building environment for perf
          */
-        int __used ret, wait_stat;
-        pid_t pid, retpid __used;
+        int __maybe_unused ret, wait_stat;
+        pid_t pid, retpid __maybe_unused;
 
         argc = parse_options(argc, argv, options,
                              bench_sched_pipe_usage, 0);
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 2f3f0029c0f7..9ea38540b873 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -239,7 +239,7 @@ static const char * const annotate_usage[] = {
         NULL
 };
 
-int cmd_annotate(int argc, const char **argv, const char *prefix __used)
+int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         struct perf_annotate annotate = {
                 .tool = {
diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c
index 1f3100216448..cae9a5fd2ecf 100644
--- a/tools/perf/builtin-bench.c
+++ b/tools/perf/builtin-bench.c
@@ -173,7 +173,7 @@ static void all_subsystem(void)
                 all_suite(&subsystems[i]);
 }
 
-int cmd_bench(int argc, const char **argv, const char *prefix __used)
+int cmd_bench(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         int i, j, status = 0;
 
diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index 995368e84e42..83654557e108 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -51,8 +51,8 @@ static int build_id_cache__add_file(const char *filename, const char *debugdir)
         return err;
 }
 
-static int build_id_cache__remove_file(const char *filename __used,
-                                       const char *debugdir __used)
+static int build_id_cache__remove_file(const char *filename __maybe_unused,
+                                       const char *debugdir __maybe_unused)
 {
         u8 build_id[BUILD_ID_SIZE];
         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
@@ -120,7 +120,8 @@ static int __cmd_buildid_cache(void)
         return 0;
 }
 
-int cmd_buildid_cache(int argc, const char **argv, const char *prefix __used)
+int cmd_buildid_cache(int argc, const char **argv,
+                      const char *prefix __maybe_unused)
 {
         argc = parse_options(argc, argv, buildid_cache_options,
                              buildid_cache_usage, 0);
diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
index 7d6842826a0c..1159feeebb19 100644
--- a/tools/perf/builtin-buildid-list.c
+++ b/tools/perf/builtin-buildid-list.c
@@ -103,7 +103,8 @@ static int __cmd_buildid_list(void)
         return perf_session__list_build_ids();
 }
 
-int cmd_buildid_list(int argc, const char **argv, const char *prefix __used)
+int cmd_buildid_list(int argc, const char **argv,
+                     const char *prefix __maybe_unused)
 {
         argc = parse_options(argc, argv, options, buildid_list_usage, 0);
         setup_pager();
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index c4c6d76b70ea..761f4197a9e2 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -33,7 +33,7 @@ static int hists__add_entry(struct hists *self,
         return -ENOMEM;
 }
 
-static int diff__process_sample_event(struct perf_tool *tool __used,
+static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
                                       union perf_event *event,
                                       struct perf_sample *sample,
                                       struct perf_evsel *evsel,
@@ -242,7 +242,7 @@ static const struct option options[] = {
         OPT_END()
 };
 
-int cmd_diff(int argc, const char **argv, const char *prefix __used)
+int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         sort_order = diff__default_sort_order;
         argc = parse_options(argc, argv, options, diff_usage, 0);
diff --git a/tools/perf/builtin-evlist.c b/tools/perf/builtin-evlist.c
index 0dd5a058f766..1fb164164fd0 100644
--- a/tools/perf/builtin-evlist.c
+++ b/tools/perf/builtin-evlist.c
@@ -113,7 +113,7 @@ static const char * const evlist_usage[] = {
         NULL
 };
 
-int cmd_evlist(int argc, const char **argv, const char *prefix __used)
+int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         struct perf_attr_details details = { .verbose = false, };
         const char *input_name = NULL;
diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c
index f9daae5ac47a..25c8b942ff85 100644
--- a/tools/perf/builtin-help.c
+++ b/tools/perf/builtin-help.c
@@ -426,7 +426,7 @@ static int show_html_page(const char *perf_cmd)
         return 0;
 }
 
-int cmd_help(int argc, const char **argv, const char *prefix __used)
+int cmd_help(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         const char *alias;
         int rc = 0;
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 64d8ba2fb7bc..1eaa6617c814 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -17,9 +17,9 @@
 static char             const *input_name = "-";
 static bool             inject_build_ids;
 
-static int perf_event__repipe_synth(struct perf_tool *tool __used,
+static int perf_event__repipe_synth(struct perf_tool *tool __maybe_unused,
                                     union perf_event *event,
-                                    struct machine *machine __used)
+                                    struct machine *machine __maybe_unused)
 {
         uint32_t size;
         void *buf = event;
@@ -40,7 +40,8 @@ static int perf_event__repipe_synth(struct perf_tool *tool __used,
 
 static int perf_event__repipe_op2_synth(struct perf_tool *tool,
                                         union perf_event *event,
-                                        struct perf_session *session __used)
+                                        struct perf_session *session
+                                        __maybe_unused)
 {
         return perf_event__repipe_synth(tool, event, NULL);
 }
@@ -52,13 +53,14 @@ static int perf_event__repipe_event_type_synth(struct perf_tool *tool,
 }
 
 static int perf_event__repipe_tracing_data_synth(union perf_event *event,
-                                                 struct perf_session *session __used)
+                                                 struct perf_session *session
+                                                 __maybe_unused)
 {
         return perf_event__repipe_synth(NULL, event, NULL);
 }
 
 static int perf_event__repipe_attr(union perf_event *event,
-                                   struct perf_evlist **pevlist __used)
+                                   struct perf_evlist **pevlist __maybe_unused)
 {
         int ret;
         ret = perf_event__process_attr(event, pevlist);
@@ -70,7 +72,7 @@ static int perf_event__repipe_attr(union perf_event *event,
 
 static int perf_event__repipe(struct perf_tool *tool,
                               union perf_event *event,
-                              struct perf_sample *sample __used,
+                              struct perf_sample *sample __maybe_unused,
                               struct machine *machine)
 {
         return perf_event__repipe_synth(tool, event, machine);
@@ -78,8 +80,8 @@ static int perf_event__repipe(struct perf_tool *tool,
 
 static int perf_event__repipe_sample(struct perf_tool *tool,
                                      union perf_event *event,
-                              struct perf_sample *sample __used,
-                              struct perf_evsel *evsel __used,
+                              struct perf_sample *sample __maybe_unused,
+                              struct perf_evsel *evsel __maybe_unused,
                               struct machine *machine)
 {
         return perf_event__repipe_synth(tool, event, machine);
@@ -163,7 +165,7 @@ static int dso__inject_build_id(struct dso *self, struct perf_tool *tool,
 static int perf_event__inject_buildid(struct perf_tool *tool,
                                       union perf_event *event,
                                       struct perf_sample *sample,
-                                      struct perf_evsel *evsel __used,
+                                      struct perf_evsel *evsel __maybe_unused,
                                       struct machine *machine)
 {
         struct addr_location al;
@@ -224,7 +226,7 @@ struct perf_tool perf_inject = {
 
 extern volatile int session_done;
 
-static void sig_handler(int sig __attribute__((__unused__)))
+static void sig_handler(int sig __maybe_unused)
 {
         session_done = 1;
 }
@@ -267,7 +269,7 @@ static const struct option options[] = {
         OPT_END()
 };
 
-int cmd_inject(int argc, const char **argv, const char *prefix __used)
+int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         argc = parse_options(argc, argv, options, report_usage, 0);
 
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index ad9f52097388..f5f8a6b745a3 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -320,7 +320,7 @@ static int perf_evsel__process_kmem_event(struct perf_evsel *evsel,
         return 0;
 }
 
-static int process_sample_event(struct perf_tool *tool __used,
+static int process_sample_event(struct perf_tool *tool __maybe_unused,
                                 union perf_event *event,
                                 struct perf_sample *sample,
                                 struct perf_evsel *evsel,
@@ -672,8 +672,8 @@ static int setup_sorting(struct list_head *sort_list, const char *arg)
         return 0;
 }
 
-static int parse_sort_opt(const struct option *opt __used,
-                          const char *arg, int unset __used)
+static int parse_sort_opt(const struct option *opt __maybe_unused,
+                          const char *arg, int unset __maybe_unused)
 {
         if (!arg)
                 return -1;
@@ -686,22 +686,24 @@ static int parse_sort_opt(const struct option *opt __used,
         return 0;
 }
 
-static int parse_caller_opt(const struct option *opt __used,
-                          const char *arg __used, int unset __used)
+static int parse_caller_opt(const struct option *opt __maybe_unused,
+                            const char *arg __maybe_unused,
+                            int unset __maybe_unused)
 {
         caller_flag = (alloc_flag + 1);
         return 0;
 }
 
-static int parse_alloc_opt(const struct option *opt __used,
-                          const char *arg __used, int unset __used)
+static int parse_alloc_opt(const struct option *opt __maybe_unused,
+                           const char *arg __maybe_unused,
+                           int unset __maybe_unused)
 {
         alloc_flag = (caller_flag + 1);
         return 0;
 }
 
-static int parse_line_opt(const struct option *opt __used,
-                          const char *arg, int unset __used)
+static int parse_line_opt(const struct option *opt __maybe_unused,
+                          const char *arg, int unset __maybe_unused)
 {
         int lines;
 
@@ -771,7 +773,7 @@ static int __cmd_record(int argc, const char **argv)
         return cmd_record(i, rec_argv, NULL);
 }
 
-int cmd_kmem(int argc, const char **argv, const char *prefix __used)
+int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
 
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 9fc6e0fa3dce..4d2aa2cbeca8 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -102,7 +102,7 @@ static int __cmd_buildid_list(int argc, const char **argv)
         return cmd_buildid_list(i, rec_argv, NULL);
 }
 
-int cmd_kvm(int argc, const char **argv, const char *prefix __used)
+int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         perf_host  = 0;
         perf_guest = 1;
diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index bdcff81b532a..1948eceb517a 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -14,7 +14,7 @@
 #include "util/parse-events.h"
 #include "util/cache.h"
 
-int cmd_list(int argc, const char **argv, const char *prefix __used)
+int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         setup_pager();
 
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 75153c87e650..a8035207a3dd 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -870,7 +870,7 @@ static int dump_info(void)
         return rc;
 }
 
-static int process_sample_event(struct perf_tool *tool __used,
+static int process_sample_event(struct perf_tool *tool __maybe_unused,
                                 union perf_event *event,
                                 struct perf_sample *sample,
                                 struct perf_evsel *evsel,
@@ -1020,7 +1020,7 @@ static int __cmd_record(int argc, const char **argv)
         return cmd_record(i, rec_argv, NULL);
 }
 
-int cmd_lock(int argc, const char **argv, const char *prefix __used)
+int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         unsigned int i;
         int rc = 0;
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index e215ae61b2ae..118aa8946573 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -143,8 +143,8 @@ static int parse_probe_event_argv(int argc, const char **argv)
         return ret;
 }
 
-static int opt_add_probe_event(const struct option *opt __used,
-                              const char *str, int unset __used)
+static int opt_add_probe_event(const struct option *opt __maybe_unused,
+                              const char *str, int unset __maybe_unused)
 {
         if (str) {
                 params.mod_events = true;
@@ -153,8 +153,8 @@ static int opt_add_probe_event(const struct option *opt __used,
                 return 0;
 }
 
-static int opt_del_probe_event(const struct option *opt __used,
-                               const char *str, int unset __used)
+static int opt_del_probe_event(const struct option *opt __maybe_unused,
+                               const char *str, int unset __maybe_unused)
 {
         if (str) {
                 params.mod_events = true;
@@ -166,7 +166,7 @@ static int opt_del_probe_event(const struct option *opt __used,
 }
 
 static int opt_set_target(const struct option *opt, const char *str,
-                        int unset __used)
+                        int unset __maybe_unused)
 {
         int ret = -ENOENT;
 
@@ -188,8 +188,8 @@ static int opt_set_target(const struct option *opt, const char *str,
 }
 
 #ifdef DWARF_SUPPORT
-static int opt_show_lines(const struct option *opt __used,
-                          const char *str, int unset __used)
+static int opt_show_lines(const struct option *opt __maybe_unused,
+                          const char *str, int unset __maybe_unused)
 {
         int ret = 0;
 
@@ -209,8 +209,8 @@ static int opt_show_lines(const struct option *opt __used,
         return ret;
 }
 
-static int opt_show_vars(const struct option *opt __used,
-                         const char *str, int unset __used)
+static int opt_show_vars(const struct option *opt __maybe_unused,
+                         const char *str, int unset __maybe_unused)
 {
         struct perf_probe_event *pev = &params.events[params.nevents];
         int ret;
@@ -229,8 +229,8 @@ static int opt_show_vars(const struct option *opt __used,
 }
 #endif
 
-static int opt_set_filter(const struct option *opt __used,
-                          const char *str, int unset __used)
+static int opt_set_filter(const struct option *opt __maybe_unused,
+                          const char *str, int unset __maybe_unused)
 {
         const char *err;
 
@@ -327,7 +327,7 @@ static const struct option options[] = {
         OPT_END()
 };
 
-int cmd_probe(int argc, const char **argv, const char *prefix __used)
+int cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         int ret;
 
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 7b8b891d4d56..c643ed669ef9 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -92,8 +92,8 @@ static int write_output(struct perf_record *rec, void *buf, size_t size)
 
 static int process_synthesized_event(struct perf_tool *tool,
                                      union perf_event *event,
-                                     struct perf_sample *sample __used,
-                                     struct machine *machine __used)
+                                     struct perf_sample *sample __maybe_unused,
+                                     struct machine *machine __maybe_unused)
 {
         struct perf_record *rec = container_of(tool, struct perf_record, tool);
         if (write_output(rec, event, event->header.size) < 0)
@@ -159,7 +159,7 @@ static void sig_handler(int sig)
         signr = sig;
 }
 
-static void perf_record__sig_exit(int exit_status __used, void *arg)
+static void perf_record__sig_exit(int exit_status __maybe_unused, void *arg)
 {
         struct perf_record *rec = arg;
         int status;
@@ -827,7 +827,7 @@ static int get_stack_size(char *str, unsigned long *_size)
 #endif /* !NO_LIBUNWIND_SUPPORT */
 
 static int
-parse_callchain_opt(const struct option *opt __used, const char *arg,
+parse_callchain_opt(const struct option *opt __maybe_unused, const char *arg,
                     int unset)
 {
         struct perf_record *rec = (struct perf_record *)opt->value;
@@ -1003,7 +1003,7 @@ const struct option record_options[] = {
         OPT_END()
 };
 
-int cmd_record(int argc, const char **argv, const char *prefix __used)
+int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         int err = -ENOMEM;
         struct perf_evsel *pos;
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 1f8d11b4f7ff..97b2e6300f4c 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -223,9 +223,9 @@ static int process_sample_event(struct perf_tool *tool,
 
 static int process_read_event(struct perf_tool *tool,
                               union perf_event *event,
-                              struct perf_sample *sample __used,
+                              struct perf_sample *sample __maybe_unused,
                               struct perf_evsel *evsel,
-                              struct machine *machine __used)
+                              struct machine *machine __maybe_unused)
 {
         struct perf_report *rep = container_of(tool, struct perf_report, tool);
 
@@ -287,7 +287,7 @@ static int perf_report__setup_sample_type(struct perf_report *rep)
 
 extern volatile int session_done;
 
-static void sig_handler(int sig __used)
+static void sig_handler(int sig __maybe_unused)
 {
         session_done = 1;
 }
@@ -533,13 +533,14 @@ setup:
 }
 
 static int
-parse_branch_mode(const struct option *opt __used, const char *str __used, int unset)
+parse_branch_mode(const struct option *opt __maybe_unused,
+                  const char *str __maybe_unused, int unset)
 {
         sort__branch_mode = !unset;
         return 0;
 }
 
-int cmd_report(int argc, const char **argv, const char *prefix __used)
+int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         struct perf_session *session;
         struct stat st;
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 782f66d3610e..82e8ec2c43b7 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -299,7 +299,7 @@ add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
 
 static void
 add_sched_event_sleep(struct task_desc *task, u64 timestamp,
-                      u64 task_state __used)
+                      u64 task_state __maybe_unused)
 {
         struct sched_atom *event = get_new_event(task, timestamp);
 
@@ -369,8 +369,8 @@ static void add_cross_task_wakeups(void)
         }
 }
 
-static void
-process_sched_event(struct task_desc *this_task __used, struct sched_atom *atom)
+static void process_sched_event(struct task_desc *this_task __maybe_unused,
+                                struct sched_atom *atom)
 {
         int ret = 0;
 
@@ -752,7 +752,7 @@ struct trace_sched_handler {
 
 static int
 replay_wakeup_event(struct trace_wakeup_event *wakeup_event,
-                    struct machine *machine __used,
+                    struct machine *machine __maybe_unused,
                     struct event_format *event, struct perf_sample *sample)
 {
         struct task_desc *waker, *wakee;
@@ -777,11 +777,11 @@ static u64 cpu_last_switched[MAX_CPUS];
 
 static int
 replay_switch_event(struct trace_switch_event *switch_event,
-                    struct machine *machine __used,
+                    struct machine *machine __maybe_unused,
                     struct event_format *event,
                     struct perf_sample *sample)
 {
-        struct task_desc *prev, __used *next;
+        struct task_desc *prev, __maybe_unused *next;
         u64 timestamp0, timestamp = sample->time;
         int cpu = sample->cpu;
         s64 delta;
@@ -932,15 +932,13 @@ static int thread_atoms_insert(struct thread *thread)
         return 0;
 }
 
-static int
-latency_fork_event(struct trace_fork_event *fork_event __used,
-                   struct event_format *event __used)
+static int latency_fork_event(struct trace_fork_event *fork_event __maybe_unused,
+                              struct event_format *event __maybe_unused)
 {
         /* should insert the newcomer */
         return 0;
 }
 
-__used
 static char sched_out_state(struct trace_switch_event *switch_event)
 {
         const char *str = TASK_STATE_TO_CHAR_STR;
@@ -971,7 +969,8 @@ add_sched_out_event(struct work_atoms *atoms,
 }
 
 static void
-add_runtime_event(struct work_atoms *atoms, u64 delta, u64 timestamp __used)
+add_runtime_event(struct work_atoms *atoms, u64 delta,
+                  u64 timestamp __maybe_unused)
 {
         struct work_atom *atom;
 
@@ -1017,7 +1016,7 @@ add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
 static int
 latency_switch_event(struct trace_switch_event *switch_event,
                      struct machine *machine,
-                     struct event_format *event __used,
+                     struct event_format *event __maybe_unused,
                      struct perf_sample *sample)
 {
         struct work_atoms *out_events, *in_events;
@@ -1105,7 +1104,8 @@ latency_runtime_event(struct trace_runtime_event *runtime_event,
 
 static int
 latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
-                     struct machine *machine, struct event_format *event __used,
+                     struct machine *machine,
+                     struct event_format *event __maybe_unused,
                      struct perf_sample *sample)
 {
         struct work_atoms *atoms;
@@ -1369,12 +1369,11 @@ static void sort_lat(void)
 
 static struct trace_sched_handler *trace_handler;
 
-static int
-process_sched_wakeup_event(struct perf_tool *tool __used,
-                           struct event_format *event,
-                           struct perf_sample *sample,
-                           struct machine *machine,
-                           struct thread *thread __used)
+static int process_sched_wakeup_event(struct perf_tool *tool __maybe_unused,
+                                      struct event_format *event,
+                                      struct perf_sample *sample,
+                                      struct machine *machine,
+                                      struct thread *thread __maybe_unused)
 {
         void *data = sample->raw_data;
         struct trace_wakeup_event wakeup_event;
@@ -1410,10 +1409,10 @@ static char next_shortname2 = '0';
 static int
 map_switch_event(struct trace_switch_event *switch_event,
                  struct machine *machine,
-                 struct event_format *event __used,
+                 struct event_format *event __maybe_unused,
                  struct perf_sample *sample)
 {
-        struct thread *sched_out __used, *sched_in;
+        struct thread *sched_out __maybe_unused, *sched_in;
         int new_shortname;
         u64 timestamp0, timestamp = sample->time;
         s64 delta;
@@ -1487,12 +1486,11 @@ map_switch_event(struct trace_switch_event *switch_event,
         return 0;
 }
 
-static int
-process_sched_switch_event(struct perf_tool *tool __used,
-                           struct event_format *event,
-                           struct perf_sample *sample,
-                           struct machine *machine,
-                           struct thread *thread __used)
+static int process_sched_switch_event(struct perf_tool *tool __maybe_unused,
+                                      struct event_format *event,
+                                      struct perf_sample *sample,
+                                      struct machine *machine,
+                                      struct thread *thread __maybe_unused)
 {
         int this_cpu = sample->cpu, err = 0;
         void *data = sample->raw_data;
@@ -1523,12 +1521,11 @@ process_sched_switch_event(struct perf_tool *tool __used,
         return err;
 }
 
-static int
-process_sched_runtime_event(struct perf_tool *tool __used,
-                            struct event_format *event,
-                            struct perf_sample *sample,
-                            struct machine *machine,
-                            struct thread *thread __used)
+static int process_sched_runtime_event(struct perf_tool *tool __maybe_unused,
+                                       struct event_format *event,
+                                       struct perf_sample *sample,
+                                       struct machine *machine,
+                                       struct thread *thread __maybe_unused)
 {
         void *data = sample->raw_data;
         struct trace_runtime_event runtime_event;
@@ -1545,12 +1542,11 @@ process_sched_runtime_event(struct perf_tool *tool __used,
         return err;
 }
 
-static int
-process_sched_fork_event(struct perf_tool *tool __used,
-                         struct event_format *event,
-                         struct perf_sample *sample,
-                         struct machine *machine __used,
-                         struct thread *thread __used)
+static int process_sched_fork_event(struct perf_tool *tool __maybe_unused,
+                                    struct event_format *event,
+                                    struct perf_sample *sample,
+                                    struct machine *machine __maybe_unused,
+                                    struct thread *thread __maybe_unused)
 {
         void *data = sample->raw_data;
         struct trace_fork_event fork_event;
@@ -1569,12 +1565,11 @@ process_sched_fork_event(struct perf_tool *tool __used,
         return err;
 }
 
-static int
-process_sched_exit_event(struct perf_tool *tool __used,
-                         struct event_format *event,
-                         struct perf_sample *sample __used,
-                         struct machine *machine __used,
-                         struct thread *thread __used)
+static int process_sched_exit_event(struct perf_tool *tool __maybe_unused,
+                                    struct event_format *event,
+                                    struct perf_sample *sample __maybe_unused,
+                                    struct machine *machine __maybe_unused,
+                                    struct thread *thread __maybe_unused)
 {
         if (verbose)
                 printf("sched_exit event %p\n", event);
@@ -1582,12 +1577,11 @@ process_sched_exit_event(struct perf_tool *tool __used,
         return 0;
 }
 
-static int
-process_sched_migrate_task_event(struct perf_tool *tool __used,
-                                 struct event_format *event,
-                                 struct perf_sample *sample,
-                                 struct machine *machine,
-                                 struct thread *thread __used)
+static int process_sched_migrate_task_event(struct perf_tool *tool __maybe_unused,
+                                            struct event_format *event,
+                                            struct perf_sample *sample,
+                                            struct machine *machine,
+                                            struct thread *thread __maybe_unused)
 {
         void *data = sample->raw_data;
         struct trace_migrate_task_event migrate_task_event;
@@ -1612,8 +1606,8 @@ typedef int (*tracepoint_handler)(struct perf_tool *tool,
                                   struct machine *machine,
                                   struct thread *thread);
 
-static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __used,
-                                                 union perf_event *event __used,
+static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_unused,
+                                                 union perf_event *event __maybe_unused,
                                                  struct perf_sample *sample,
                                                  struct perf_evsel *evsel,
                                                  struct machine *machine)
@@ -1918,7 +1912,7 @@ static int __cmd_record(int argc, const char **argv)
         return cmd_record(i, rec_argv, NULL);
 }
 
-int cmd_sched(int argc, const char **argv, const char *prefix __used)
+int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         argc = parse_options(argc, argv, sched_options, sched_usage,
                              PARSE_OPT_STOP_AT_NON_OPTION);
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index c350cfee3157..6d98a83d5a60 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -430,9 +430,9 @@ static void process_event(union perf_event *event, struct perf_sample *sample,
         printf("\n");
 }
 
-static int default_start_script(const char *script __unused,
-                                int argc __unused,
-                                const char **argv __unused)
+static int default_start_script(const char *script __maybe_unused,
+                                int argc __maybe_unused,
+                                const char **argv __maybe_unused)
 {
         return 0;
 }
@@ -442,8 +442,8 @@ static int default_stop_script(void)
         return 0;
 }
 
-static int default_generate_script(struct pevent *pevent __unused,
-                                   const char *outfile __unused)
+static int default_generate_script(struct pevent *pevent __maybe_unused,
+                                   const char *outfile __maybe_unused)
 {
         return 0;
 }
@@ -474,7 +474,7 @@ static int cleanup_scripting(void)
 
 static const char *input_name;
 
-static int process_sample_event(struct perf_tool *tool __used,
+static int process_sample_event(struct perf_tool *tool __maybe_unused,
                                 union perf_event *event,
                                 struct perf_sample *sample,
                                 struct perf_evsel *evsel,
@@ -534,7 +534,7 @@ static struct perf_tool perf_script = {
 
 extern volatile int session_done;
 
-static void sig_handler(int sig __unused)
+static void sig_handler(int sig __maybe_unused)
 {
         session_done = 1;
 }
@@ -644,8 +644,8 @@ static void list_available_languages(void)
         fprintf(stderr, "\n");
 }
 
-static int parse_scriptname(const struct option *opt __used,
-                            const char *str, int unset __used)
+static int parse_scriptname(const struct option *opt __maybe_unused,
+                            const char *str, int unset __maybe_unused)
 {
         char spec[PATH_MAX];
         const char *script, *ext;
@@ -690,8 +690,8 @@ static int parse_scriptname(const struct option *opt __used,
         return 0;
 }
 
-static int parse_output_fields(const struct option *opt __used,
-                            const char *arg, int unset __used)
+static int parse_output_fields(const struct option *opt __maybe_unused,
+                            const char *arg, int unset __maybe_unused)
 {
         char *tok;
         int i, imax = sizeof(all_output_options) / sizeof(struct output_option);
@@ -982,8 +982,9 @@ static char *get_script_root(struct dirent *script_dirent, const char *suffix)
         return script_root;
 }
 
-static int list_available_scripts(const struct option *opt __used,
-                                  const char *s __used, int unset __used)
+static int list_available_scripts(const struct option *opt __maybe_unused,
+                                  const char *s __maybe_unused,
+                                  int unset __maybe_unused)
 {
         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
         char scripts_path[MAXPATHLEN];
@@ -1172,7 +1173,7 @@ static int have_cmd(int argc, const char **argv)
         return 0;
 }
 
-int cmd_script(int argc, const char **argv, const char *prefix __used)
+int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         char *rec_script_path = NULL;
         char *rep_script_path = NULL;
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 02f49eba677f..dab347d7b010 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -417,7 +417,7 @@ static int read_counter(struct perf_evsel *counter)
         return 0;
 }
 
-static int run_perf_stat(int argc __used, const char **argv)
+static int run_perf_stat(int argc __maybe_unused, const char **argv)
 {
         unsigned long long t0, t1;
         struct perf_evsel *counter, *first;
@@ -634,7 +634,9 @@ static const char *get_ratio_color(enum grc_type type, double ratio)
         return color;
 }
 
-static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_stalled_cycles_frontend(int cpu,
+                                          struct perf_evsel *evsel
+                                          __maybe_unused, double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -651,7 +653,9 @@ static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __us
         fprintf(output, " frontend cycles idle   ");
 }
 
-static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_stalled_cycles_backend(int cpu,
+                                         struct perf_evsel *evsel
+                                         __maybe_unused, double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -668,7 +672,9 @@ static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __use
         fprintf(output, " backend  cycles idle   ");
 }
 
-static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_branch_misses(int cpu,
+                                struct perf_evsel *evsel __maybe_unused,
+                                double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -685,7 +691,9 @@ static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double
         fprintf(output, " of all branches        ");
 }
 
-static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_l1_dcache_misses(int cpu,
+                                   struct perf_evsel *evsel __maybe_unused,
+                                   double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -702,7 +710,9 @@ static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, dou
         fprintf(output, " of all L1-dcache hits  ");
 }
 
-static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_l1_icache_misses(int cpu,
+                                   struct perf_evsel *evsel __maybe_unused,
+                                   double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -719,7 +729,9 @@ static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, dou
         fprintf(output, " of all L1-icache hits  ");
 }
 
-static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_dtlb_cache_misses(int cpu,
+                                    struct perf_evsel *evsel __maybe_unused,
+                                    double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -736,7 +748,9 @@ static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, do
         fprintf(output, " of all dTLB cache hits ");
 }
 
-static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_itlb_cache_misses(int cpu,
+                                    struct perf_evsel *evsel __maybe_unused,
+                                    double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -753,7 +767,9 @@ static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, do
         fprintf(output, " of all iTLB cache hits ");
 }
 
-static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_ll_cache_misses(int cpu,
+                                  struct perf_evsel *evsel __maybe_unused,
+                                  double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -1059,8 +1075,8 @@ static const char * const stat_usage[] = {
         NULL
 };
 
-static int stat__set_big_num(const struct option *opt __used,
-                             const char *s __used, int unset)
+static int stat__set_big_num(const struct option *opt __maybe_unused,
+                             const char *s __maybe_unused, int unset)
 {
         big_num_opt = unset ? 0 : 1;
         return 0;
@@ -1154,7 +1170,7 @@ static int add_default_attributes(void)
         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
 }
 
-int cmd_stat(int argc, const char **argv, const char *prefix __used)
+int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         struct perf_evsel *pos;
         int status = -ENOMEM;
diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c
index 6ae102eba5fa..d33143efefce 100644
--- a/tools/perf/builtin-test.c
+++ b/tools/perf/builtin-test.c
@@ -18,7 +18,8 @@
 
 #include <sys/mman.h>
 
-static int vmlinux_matches_kallsyms_filter(struct map *map __used, struct symbol *sym)
+static int vmlinux_matches_kallsyms_filter(struct map *map __maybe_unused,
+                                           struct symbol *sym)
 {
         bool *visited = symbol__priv(sym);
         *visited = true;
@@ -996,7 +997,9 @@ static u64 mmap_read_self(void *addr)
 /*
  * If the RDPMC instruction faults then signal this back to the test parent task:
  */
-static void segfault_handler(int sig __used, siginfo_t *info __used, void *uc __used)
+static void segfault_handler(int sig __maybe_unused,
+                             siginfo_t *info __maybe_unused,
+                             void *uc __maybe_unused)
 {
         exit(-1);
 }
@@ -1315,7 +1318,7 @@ static int perf_test__list(int argc, const char **argv)
         return 0;
 }
 
-int cmd_test(int argc, const char **argv, const char *prefix __used)
+int cmd_test(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         const char * const test_usage[] = {
         "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 3b75b2e21ea5..55a3a6c6b9e7 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -275,28 +275,28 @@ static int cpus_cstate_state[MAX_CPUS];
 static u64 cpus_pstate_start_times[MAX_CPUS];
 static u64 cpus_pstate_state[MAX_CPUS];
 
-static int process_comm_event(struct perf_tool *tool __used,
+static int process_comm_event(struct perf_tool *tool __maybe_unused,
                               union perf_event *event,
-                              struct perf_sample *sample __used,
-                              struct machine *machine __used)
+                              struct perf_sample *sample __maybe_unused,
+                              struct machine *machine __maybe_unused)
 {
         pid_set_comm(event->comm.tid, event->comm.comm);
         return 0;
 }
 
-static int process_fork_event(struct perf_tool *tool __used,
+static int process_fork_event(struct perf_tool *tool __maybe_unused,
                               union perf_event *event,
-                              struct perf_sample *sample __used,
-                              struct machine *machine __used)
+                              struct perf_sample *sample __maybe_unused,
+                              struct machine *machine __maybe_unused)
 {
         pid_fork(event->fork.pid, event->fork.ppid, event->fork.time);
         return 0;
 }
 
-static int process_exit_event(struct perf_tool *tool __used,
+static int process_exit_event(struct perf_tool *tool __maybe_unused,
                               union perf_event *event,
-                              struct perf_sample *sample __used,
-                              struct machine *machine __used)
+                              struct perf_sample *sample __maybe_unused,
+                              struct machine *machine __maybe_unused)
 {
         pid_exit(event->fork.pid, event->fork.time);
         return 0;
@@ -491,11 +491,11 @@ static void sched_switch(int cpu, u64 timestamp, struct trace_entry *te)
 }
 
 
-static int process_sample_event(struct perf_tool *tool __used,
-                                union perf_event *event __used,
+static int process_sample_event(struct perf_tool *tool __maybe_unused,
+                                union perf_event *event __maybe_unused,
                                 struct perf_sample *sample,
                                 struct perf_evsel *evsel,
-                                struct machine *machine __used)
+                                struct machine *machine __maybe_unused)
 {
         struct trace_entry *te;
 
@@ -1081,7 +1081,8 @@ static int __cmd_record(int argc, const char **argv)
 }
 
 static int
-parse_process(const struct option *opt __used, const char *arg, int __used unset)
+parse_process(const struct option *opt __maybe_unused, const char *arg,
+              int __maybe_unused unset)
 {
         if (arg)
                 add_process_filter(arg);
@@ -1106,7 +1107,8 @@ static const struct option options[] = {
 };
 
 
-int cmd_timechart(int argc, const char **argv, const char *prefix __used)
+int cmd_timechart(int argc, const char **argv,
+                  const char *prefix __maybe_unused)
 {
         argc = parse_options(argc, argv, options, timechart_usage,
                         PARSE_OPT_STOP_AT_NON_OPTION);
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 0513aaa659f9..5550754c05f2 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -95,7 +95,8 @@ static void perf_top__update_print_entries(struct perf_top *top)
                 top->print_entries -= 9;
 }
 
-static void perf_top__sig_winch(int sig __used, siginfo_t *info __used, void *arg)
+static void perf_top__sig_winch(int sig __maybe_unused,
+                                siginfo_t *info __maybe_unused, void *arg)
 {
         struct perf_top *top = arg;
 
@@ -663,7 +664,7 @@ static const char *skip_symbols[] = {
         NULL
 };
 
-static int symbol_filter(struct map *map __used, struct symbol *sym)
+static int symbol_filter(struct map *map __maybe_unused, struct symbol *sym)
 {
         const char *name = sym->name;
         int i;
@@ -1163,7 +1164,7 @@ static const char * const top_usage[] = {
         NULL
 };
 
-int cmd_top(int argc, const char **argv, const char *prefix __used)
+int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         struct perf_evsel *pos;
         int status;
diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
index 1818a531f1d3..4aeb7d5df939 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -269,7 +269,7 @@ int ui_browser__show(struct ui_browser *browser, const char *title,
         return err ? 0 : -1;
 }
 
-void ui_browser__hide(struct ui_browser *browser __used)
+void ui_browser__hide(struct ui_browser *browser __maybe_unused)
 {
         pthread_mutex_lock(&ui__lock);
         ui_helpline__pop();
@@ -518,7 +518,7 @@ static struct ui_browser__colorset {
 
 
 static int ui_browser__color_config(const char *var, const char *value,
-                                    void *data __used)
+                                    void *data __maybe_unused)
 {
         char *fg = NULL, *bg;
         int i;
@@ -602,7 +602,8 @@ void __ui_browser__vline(struct ui_browser *browser, unsigned int column,
         SLsmg_set_char_set(0);
 }
 
-void ui_browser__write_graph(struct ui_browser *browser __used, int graph)
+void ui_browser__write_graph(struct ui_browser *browser __maybe_unused,
+                             int graph)
 {
         SLsmg_set_char_set(1);
         SLsmg_write_char(graph);
diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index 67a2703e666a..8f8cd2d73b3b 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -54,7 +54,8 @@ static inline struct browser_disasm_line *disasm_line__browser(struct disasm_lin
         return (struct browser_disasm_line *)(dl + 1);
 }
 
-static bool disasm_line__filter(struct ui_browser *browser __used, void *entry)
+static bool disasm_line__filter(struct ui_browser *browser __maybe_unused,
+                                void *entry)
 {
         if (annotate_browser__opts.hide_src_code) {
                 struct disasm_line *dl = list_entry(entry, struct disasm_line, node);
@@ -928,7 +929,8 @@ static int annotate_config__cmp(const void *name, const void *cfgp)
         return strcmp(name, cfg->name);
 }
 
-static int annotate__config(const char *var, const char *value, void *data __used)
+static int annotate__config(const char *var, const char *value,
+                            void *data __maybe_unused)
 {
         struct annotate__config *cfg;
         const char *name;
diff --git a/tools/perf/ui/gtk/browser.c b/tools/perf/ui/gtk/browser.c
index 3c16ab50e0f8..55acba6e0df4 100644
--- a/tools/perf/ui/gtk/browser.c
+++ b/tools/perf/ui/gtk/browser.c
@@ -237,8 +237,9 @@ static GtkWidget *perf_gtk__setup_statusbar(void)
 
 int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist,
                                   const char *help,
-                                  void (*timer) (void *arg)__used,
-                                  void *arg __used, int delay_secs __used)
+                                  void (*timer) (void *arg)__maybe_unused,
+                                  void *arg __maybe_unused,
+                                  int delay_secs __maybe_unused)
 {
         struct perf_evsel *pos;
         GtkWidget *vbox;
diff --git a/tools/perf/ui/gtk/setup.c b/tools/perf/ui/gtk/setup.c
index 26429437e19e..3c4c6ef78283 100644
--- a/tools/perf/ui/gtk/setup.c
+++ b/tools/perf/ui/gtk/setup.c
@@ -12,7 +12,7 @@ int perf_gtk__init(void)
         return gtk_init_check(NULL, NULL) ? 0 : -1;
 }
 
-void perf_gtk__exit(bool wait_for_ok __used)
+void perf_gtk__exit(bool wait_for_ok __maybe_unused)
 {
         if (!perf_gtk__is_active_context(pgctx))
                 return;
diff --git a/tools/perf/ui/gtk/util.c b/tools/perf/ui/gtk/util.c
index b8efb966f94c..8aada5b3c04c 100644
--- a/tools/perf/ui/gtk/util.c
+++ b/tools/perf/ui/gtk/util.c
@@ -117,8 +117,8 @@ struct perf_error_ops perf_gtk_eops = {
  *        For now, just add stubs for NO_NEWT=1 build.
  */
 #ifdef NO_NEWT_SUPPORT
-void ui_progress__update(u64 curr __used, u64 total __used,
-                         const char *title __used)
+void ui_progress__update(u64 curr __maybe_unused, u64 total __maybe_unused,
+                         const char *title __maybe_unused)
 {
 }
 #endif
diff --git a/tools/perf/ui/helpline.c b/tools/perf/ui/helpline.c
index 78ba28ac7a2c..a49bcf3c190b 100644
--- a/tools/perf/ui/helpline.c
+++ b/tools/perf/ui/helpline.c
@@ -12,7 +12,7 @@ static void nop_helpline__pop(void)
 {
 }
 
-static void nop_helpline__push(const char *msg __used)
+static void nop_helpline__push(const char *msg __maybe_unused)
 {
 }
 
diff --git a/tools/perf/ui/helpline.h b/tools/perf/ui/helpline.h
index a2487f93aa48..2b667ee454c3 100644
--- a/tools/perf/ui/helpline.h
+++ b/tools/perf/ui/helpline.h
@@ -24,8 +24,8 @@ void ui_helpline__puts(const char *msg);
 extern char ui_helpline__current[512];
 
 #ifdef NO_NEWT_SUPPORT
-static inline int ui_helpline__show_help(const char *format __used,
-                                         va_list ap __used)
+static inline int ui_helpline__show_help(const char *format __maybe_unused,
+                                         va_list ap __maybe_unused)
 {
         return 0;
 }
@@ -35,8 +35,8 @@ int ui_helpline__show_help(const char *format, va_list ap);
 #endif /* NO_NEWT_SUPPORT */
 
 #ifdef NO_GTK2_SUPPORT
-static inline int perf_gtk__show_helpline(const char *format __used,
-                                          va_list ap __used)
+static inline int perf_gtk__show_helpline(const char *format __maybe_unused,
+                                          va_list ap __maybe_unused)
 {
         return 0;
 }
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index 031b349a3f84..407e855cccb8 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -13,7 +13,7 @@ static int hpp__header_overhead(struct perf_hpp *hpp)
         return scnprintf(hpp->buf, hpp->size, fmt);
 }
 
-static int hpp__width_overhead(struct perf_hpp *hpp __used)
+static int hpp__width_overhead(struct perf_hpp *hpp __maybe_unused)
 {
         return 8;
 }
@@ -62,7 +62,7 @@ static int hpp__header_overhead_sys(struct perf_hpp *hpp)
         return scnprintf(hpp->buf, hpp->size, fmt, "sys");
 }
 
-static int hpp__width_overhead_sys(struct perf_hpp *hpp __used)
+static int hpp__width_overhead_sys(struct perf_hpp *hpp __maybe_unused)
 {
         return 6;
 }
@@ -88,7 +88,7 @@ static int hpp__header_overhead_us(struct perf_hpp *hpp)
         return scnprintf(hpp->buf, hpp->size, fmt, "user");
 }
 
-static int hpp__width_overhead_us(struct perf_hpp *hpp __used)
+static int hpp__width_overhead_us(struct perf_hpp *hpp __maybe_unused)
 {
         return 6;
 }
@@ -112,7 +112,7 @@ static int hpp__header_overhead_guest_sys(struct perf_hpp *hpp)
         return scnprintf(hpp->buf, hpp->size, "guest sys");
 }
 
-static int hpp__width_overhead_guest_sys(struct perf_hpp *hpp __used)
+static int hpp__width_overhead_guest_sys(struct perf_hpp *hpp __maybe_unused)
 {
         return 9;
 }
@@ -138,7 +138,7 @@ static int hpp__header_overhead_guest_us(struct perf_hpp *hpp)
         return scnprintf(hpp->buf, hpp->size, "guest usr");
 }
 
-static int hpp__width_overhead_guest_us(struct perf_hpp *hpp __used)
+static int hpp__width_overhead_guest_us(struct perf_hpp *hpp __maybe_unused)
 {
         return 9;
 }
@@ -166,7 +166,7 @@ static int hpp__header_samples(struct perf_hpp *hpp)
         return scnprintf(hpp->buf, hpp->size, fmt, "Samples");
 }
 
-static int hpp__width_samples(struct perf_hpp *hpp __used)
+static int hpp__width_samples(struct perf_hpp *hpp __maybe_unused)
 {
         return 11;
 }
@@ -185,7 +185,7 @@ static int hpp__header_period(struct perf_hpp *hpp)
         return scnprintf(hpp->buf, hpp->size, fmt, "Period");
 }
 
-static int hpp__width_period(struct perf_hpp *hpp __used)
+static int hpp__width_period(struct perf_hpp *hpp __maybe_unused)
 {
         return 12;
 }
@@ -204,7 +204,7 @@ static int hpp__header_delta(struct perf_hpp *hpp)
         return scnprintf(hpp->buf, hpp->size, fmt, "Delta");
 }
 
-static int hpp__width_delta(struct perf_hpp *hpp __used)
+static int hpp__width_delta(struct perf_hpp *hpp __maybe_unused)
 {
         return 7;
 }
@@ -238,12 +238,13 @@ static int hpp__header_displ(struct perf_hpp *hpp)
         return scnprintf(hpp->buf, hpp->size, "Displ.");
 }
 
-static int hpp__width_displ(struct perf_hpp *hpp __used)
+static int hpp__width_displ(struct perf_hpp *hpp __maybe_unused)
 {
         return 6;
 }
 
-static int hpp__entry_displ(struct perf_hpp *hpp, struct hist_entry *he __used)
+static int hpp__entry_displ(struct perf_hpp *hpp,
+                            struct hist_entry *he __maybe_unused)
 {
         const char *fmt = symbol_conf.field_sep ? "%s" : "%6.6s";
         char buf[32] = " ";
diff --git a/tools/perf/ui/tui/setup.c b/tools/perf/ui/tui/setup.c
index 4dc0887c04f1..60debb81537a 100644
--- a/tools/perf/ui/tui/setup.c
+++ b/tools/perf/ui/tui/setup.c
@@ -28,7 +28,7 @@ void ui__refresh_dimensions(bool force)
         }
 }
 
-static void ui__sigwinch(int sig __used)
+static void ui__sigwinch(int sig __maybe_unused)
 {
         ui__need_resize = 1;
 }
@@ -88,7 +88,7 @@ int ui__getch(int delay_secs)
         return SLkp_getkey();
 }
 
-static void newt_suspend(void *d __used)
+static void newt_suspend(void *d __maybe_unused)
 {
         newtSuspend();
         raise(SIGTSTP);
diff --git a/tools/perf/util/alias.c b/tools/perf/util/alias.c
index b8144e80bb1e..e6d134773d0a 100644
--- a/tools/perf/util/alias.c
+++ b/tools/perf/util/alias.c
@@ -3,7 +3,8 @@
 static const char *alias_key;
 static char *alias_val;
 
-static int alias_lookup_cb(const char *k, const char *v, void *cb __used)
+static int alias_lookup_cb(const char *k, const char *v,
+                           void *cb __maybe_unused)
 {
         if (!prefixcmp(k, "alias.") && !strcmp(k+6, alias_key)) {
                 if (!v)
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 04eafd3939df..f0a910371377 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -313,8 +313,8 @@ static struct ins_ops dec_ops = {
         .scnprintf = dec__scnprintf,
 };
 
-static int nop__scnprintf(struct ins *ins __used, char *bf, size_t size,
-                          struct ins_operands *ops __used)
+static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size,
+                          struct ins_operands *ops __maybe_unused)
 {
         return scnprintf(bf, size, "%-6.6s", "nop");
 }
@@ -416,7 +416,7 @@ static struct ins *ins__find(const char *name)
         return bsearch(name, instructions, nmemb, sizeof(struct ins), ins__cmp);
 }
 
-int symbol__annotate_init(struct map *map __used, struct symbol *sym)
+int symbol__annotate_init(struct map *map __maybe_unused, struct symbol *sym)
 {
         struct annotation *notes = symbol__annotation(sym);
         pthread_mutex_init(&notes->lock, NULL);
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 62a6e7a7365d..9b5b21e7b032 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -126,7 +126,7 @@ int symbol__alloc_hist(struct symbol *sym);
 void symbol__annotate_zero_histograms(struct symbol *sym);
 
 int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize);
-int symbol__annotate_init(struct map *map __used, struct symbol *sym);
+int symbol__annotate_init(struct map *map __maybe_unused, struct symbol *sym);
 int symbol__annotate_printf(struct symbol *sym, struct map *map, int evidx,
                             bool full_paths, int min_pcnt, int max_lines,
                             int context);
@@ -139,11 +139,12 @@ int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx,
                          int max_lines);
 
 #ifdef NO_NEWT_SUPPORT
-static inline int symbol__tui_annotate(struct symbol *sym __used,
-                                       struct map *map __used,
-                                       int evidx __used,
-                                       void(*timer)(void *arg) __used,
-                                       void *arg __used, int delay_secs __used)
+static inline int symbol__tui_annotate(struct symbol *sym __maybe_unused,
+                                       struct map *map __maybe_unused,
+                                       int evidx __maybe_unused,
+                                       void(*timer)(void *arg) __maybe_unused,
+                                       void *arg __maybe_unused,
+                                       int delay_secs __maybe_unused)
 {
         return 0;
 }
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index fd9a5944b627..8e3a740ddbd4 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -16,10 +16,10 @@
 #include "session.h"
 #include "tool.h"
 
-static int build_id__mark_dso_hit(struct perf_tool *tool __used,
+static int build_id__mark_dso_hit(struct perf_tool *tool __maybe_unused,
                                   union perf_event *event,
-                                  struct perf_sample *sample __used,
-                                  struct perf_evsel *evsel __used,
+                                  struct perf_sample *sample __maybe_unused,
+                                  struct perf_evsel *evsel __maybe_unused,
                                   struct machine *machine)
 {
         struct addr_location al;
@@ -41,9 +41,10 @@ static int build_id__mark_dso_hit(struct perf_tool *tool __used,
         return 0;
 }
 
-static int perf_event__exit_del_thread(struct perf_tool *tool __used,
+static int perf_event__exit_del_thread(struct perf_tool *tool __maybe_unused,
                                        union perf_event *event,
-                                       struct perf_sample *sample __used,
+                                       struct perf_sample *sample
+                                       __maybe_unused,
                                        struct machine *machine)
 {
         struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
index cff18c617d13..ab1769426541 100644
--- a/tools/perf/util/cache.h
+++ b/tools/perf/util/cache.h
@@ -39,7 +39,7 @@ static inline void setup_browser(bool fallback_to_pager)
         if (fallback_to_pager)
                 setup_pager();
 }
-static inline void exit_browser(bool wait_for_ok __used) {}
+static inline void exit_browser(bool wait_for_ok __maybe_unused) {}
 #else
 void setup_browser(bool fallback_to_pager);
 void exit_browser(bool wait_for_ok);
@@ -49,7 +49,7 @@ static inline int ui__init(void)
 {
         return -1;
 }
-static inline void ui__exit(bool wait_for_ok __used) {}
+static inline void ui__exit(bool wait_for_ok __maybe_unused) {}
 #else
 int ui__init(void);
 void ui__exit(bool wait_for_ok);
@@ -60,7 +60,7 @@ static inline int perf_gtk__init(void)
 {
         return -1;
 }
-static inline void perf_gtk__exit(bool wait_for_ok __used) {}
+static inline void perf_gtk__exit(bool wait_for_ok __maybe_unused) {}
 #else
 int perf_gtk__init(void);
 void perf_gtk__exit(bool wait_for_ok);
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 3a6bff47614f..d3b3f5d82137 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -93,7 +93,7 @@ __sort_chain_flat(struct rb_root *rb_root, struct callchain_node *node,
  */
 static void
 sort_chain_flat(struct rb_root *rb_root, struct callchain_root *root,
-                u64 min_hit, struct callchain_param *param __used)
+                u64 min_hit, struct callchain_param *param __maybe_unused)
 {
         __sort_chain_flat(rb_root, &root->node, min_hit);
 }
@@ -115,7 +115,7 @@ static void __sort_chain_graph_abs(struct callchain_node *node,
 
 static void
 sort_chain_graph_abs(struct rb_root *rb_root, struct callchain_root *chain_root,
-                     u64 min_hit, struct callchain_param *param __used)
+                     u64 min_hit, struct callchain_param *param __maybe_unused)
 {
         __sort_chain_graph_abs(&chain_root->node, min_hit);
         rb_root->rb_node = chain_root->node.rb_root.rb_node;
@@ -140,7 +140,7 @@ static void __sort_chain_graph_rel(struct callchain_node *node,
 
 static void
 sort_chain_graph_rel(struct rb_root *rb_root, struct callchain_root *chain_root,
-                     u64 min_hit __used, struct callchain_param *param)
+                     u64 min_hit __maybe_unused, struct callchain_param *param)
 {
         __sort_chain_graph_rel(&chain_root->node, param->min_percent / 100.0);
         rb_root->rb_node = chain_root->node.rb_root.rb_node;
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index dbe2f16b1a1a..96bbda1ddb83 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -138,8 +138,8 @@ void close_cgroup(struct cgroup_sel *cgrp)
         }
 }
 
-int parse_cgroups(const struct option *opt __used, const char *str,
-                  int unset __used)
+int parse_cgroups(const struct option *opt __maybe_unused, const char *str,
+                  int unset __maybe_unused)
 {
         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
         const char *p, *e, *eos = str + strlen(str);
diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 6faa3a18bfbd..3e0fdd369ccb 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -342,13 +342,15 @@ const char *perf_config_dirname(const char *name, const char *value)
         return value;
 }
 
-static int perf_default_core_config(const char *var __used, const char *value __used)
+static int perf_default_core_config(const char *var __maybe_unused,
+                                    const char *value __maybe_unused)
 {
         /* Add other config variables here. */
         return 0;
 }
 
-int perf_default_config(const char *var, const char *value, void *dummy __used)
+int perf_default_config(const char *var, const char *value,
+                        void *dummy __maybe_unused)
 {
         if (!prefixcmp(var, "core."))
                 return perf_default_core_config(var, value);
diff --git a/tools/perf/util/debug.h b/tools/perf/util/debug.h
index 05e660cbf7e2..bb2e7d1007ab 100644
--- a/tools/perf/util/debug.h
+++ b/tools/perf/util/debug.h
@@ -16,19 +16,20 @@ struct ui_progress;
 struct perf_error_ops;
 
 #if defined(NO_NEWT_SUPPORT) && defined(NO_GTK2_SUPPORT)
-static inline void ui_progress__update(u64 curr __used, u64 total __used,
-                                       const char *title __used) {}
+static inline void ui_progress__update(u64 curr __maybe_unused,
+                                       u64 total __maybe_unused,
+                                       const char *title __maybe_unused) {}
 
 #define ui__error(format, arg...) ui__warning(format, ##arg)
 
 static inline int
-perf_error__register(struct perf_error_ops *eops __used)
+perf_error__register(struct perf_error_ops *eops __maybe_unused)
 {
         return 0;
 }
 
 static inline int
-perf_error__unregister(struct perf_error_ops *eops __used)
+perf_error__unregister(struct perf_error_ops *eops __maybe_unused)
 {
         return 0;
 }
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index f7f480503af4..8202f5ca0483 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -514,9 +514,9 @@ size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
         return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
 }
 
-int perf_event__process_comm(struct perf_tool *tool __used,
+int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
                              union perf_event *event,
-                             struct perf_sample *sample __used,
+                             struct perf_sample *sample __maybe_unused,
                              struct machine *machine)
 {
         struct thread *thread = machine__findnew_thread(machine, event->comm.tid);
@@ -532,10 +532,10 @@ int perf_event__process_comm(struct perf_tool *tool __used,
         return 0;
 }
 
-int perf_event__process_lost(struct perf_tool *tool __used,
+int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
                              union perf_event *event,
-                             struct perf_sample *sample __used,
-                             struct machine *machine __used)
+                             struct perf_sample *sample __maybe_unused,
+                             struct machine *machine __maybe_unused)
 {
         dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
                     event->lost.id, event->lost.lost);
@@ -555,7 +555,8 @@ static void perf_event__set_kernel_mmap_len(union perf_event *event,
                 maps[MAP__FUNCTION]->end = ~0ULL;
 }
 
-static int perf_event__process_kernel_mmap(struct perf_tool *tool __used,
+static int perf_event__process_kernel_mmap(struct perf_tool *tool
+                                           __maybe_unused,
                                            union perf_event *event,
                                            struct machine *machine)
 {
@@ -657,7 +658,7 @@ size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
 
 int perf_event__process_mmap(struct perf_tool *tool,
                              union perf_event *event,
-                             struct perf_sample *sample __used,
+                             struct perf_sample *sample __maybe_unused,
                              struct machine *machine)
 {
         struct thread *thread;
@@ -701,9 +702,9 @@ size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
                        event->fork.ppid, event->fork.ptid);
 }
 
-int perf_event__process_task(struct perf_tool *tool __used,
+int perf_event__process_task(struct perf_tool *tool __maybe_unused,
                              union perf_event *event,
-                             struct perf_sample *sample __used,
+                             struct perf_sample *sample __maybe_unused,
                               struct machine *machine)
 {
         struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 87996cab21d0..acbf6336199e 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -475,7 +475,7 @@ static bool perf_session__read_build_ids(struct perf_session *session, bool with
         return ret;
 }
 
-static int write_tracing_data(int fd, struct perf_header *h __used,
+static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
                             struct perf_evlist *evlist)
 {
         return read_tracing_data(fd, &evlist->entries);
@@ -483,7 +483,7 @@ static int write_tracing_data(int fd, struct perf_header *h __used,
 
 
 static int write_build_id(int fd, struct perf_header *h,
-                          struct perf_evlist *evlist __used)
+                          struct perf_evlist *evlist __maybe_unused)
 {
         struct perf_session *session;
         int err;
@@ -504,8 +504,8 @@ static int write_build_id(int fd, struct perf_header *h,
         return 0;
 }
 
-static int write_hostname(int fd, struct perf_header *h __used,
-                          struct perf_evlist *evlist __used)
+static int write_hostname(int fd, struct perf_header *h __maybe_unused,
+                          struct perf_evlist *evlist __maybe_unused)
 {
         struct utsname uts;
         int ret;
@@ -517,8 +517,8 @@ static int write_hostname(int fd, struct perf_header *h __used,
         return do_write_string(fd, uts.nodename);
 }
 
-static int write_osrelease(int fd, struct perf_header *h __used,
-                           struct perf_evlist *evlist __used)
+static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
+                           struct perf_evlist *evlist __maybe_unused)
 {
         struct utsname uts;
         int ret;
@@ -530,8 +530,8 @@ static int write_osrelease(int fd, struct perf_header *h __used,
         return do_write_string(fd, uts.release);
 }
 
-static int write_arch(int fd, struct perf_header *h __used,
-                      struct perf_evlist *evlist __used)
+static int write_arch(int fd, struct perf_header *h __maybe_unused,
+                      struct perf_evlist *evlist __maybe_unused)
 {
         struct utsname uts;
         int ret;
@@ -543,14 +543,14 @@ static int write_arch(int fd, struct perf_header *h __used,
         return do_write_string(fd, uts.machine);
 }
 
-static int write_version(int fd, struct perf_header *h __used,
-                         struct perf_evlist *evlist __used)
+static int write_version(int fd, struct perf_header *h __maybe_unused,
+                         struct perf_evlist *evlist __maybe_unused)
 {
         return do_write_string(fd, perf_version_string);
 }
 
-static int write_cpudesc(int fd, struct perf_header *h __used,
-                       struct perf_evlist *evlist __used)
+static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
+                       struct perf_evlist *evlist __maybe_unused)
 {
 #ifndef CPUINFO_PROC
 #define CPUINFO_PROC NULL
@@ -608,8 +608,8 @@ done:
         return ret;
 }
 
-static int write_nrcpus(int fd, struct perf_header *h __used,
-                        struct perf_evlist *evlist __used)
+static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
+                        struct perf_evlist *evlist __maybe_unused)
 {
         long nr;
         u32 nrc, nra;
@@ -634,7 +634,7 @@ static int write_nrcpus(int fd, struct perf_header *h __used,
         return do_write(fd, &nra, sizeof(nra));
 }
 
-static int write_event_desc(int fd, struct perf_header *h __used,
+static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
                             struct perf_evlist *evlist)
 {
         struct perf_evsel *evsel;
@@ -691,8 +691,8 @@ static int write_event_desc(int fd, struct perf_header *h __used,
         return 0;
 }
 
-static int write_cmdline(int fd, struct perf_header *h __used,
-                         struct perf_evlist *evlist __used)
+static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
+                         struct perf_evlist *evlist __maybe_unused)
 {
         char buf[MAXPATHLEN];
         char proc[32];
@@ -860,8 +860,8 @@ static struct cpu_topo *build_cpu_topology(void)
         return tp;
 }
 
-static int write_cpu_topology(int fd, struct perf_header *h __used,
-                          struct perf_evlist *evlist __used)
+static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
+                          struct perf_evlist *evlist __maybe_unused)
 {
         struct cpu_topo *tp;
         u32 i;
@@ -896,8 +896,8 @@ done:
 
 
 
-static int write_total_mem(int fd, struct perf_header *h __used,
-                          struct perf_evlist *evlist __used)
+static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
+                          struct perf_evlist *evlist __maybe_unused)
 {
         char *buf = NULL;
         FILE *fp;
@@ -982,8 +982,8 @@ done:
         return ret;
 }
 
-static int write_numa_topology(int fd, struct perf_header *h __used,
-                          struct perf_evlist *evlist __used)
+static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
+                          struct perf_evlist *evlist __maybe_unused)
 {
         char *buf = NULL;
         size_t len = 0;
@@ -1043,8 +1043,8 @@ done:
  * };
  */
 
-static int write_pmu_mappings(int fd, struct perf_header *h __used,
-                              struct perf_evlist *evlist __used)
+static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
+                              struct perf_evlist *evlist __maybe_unused)
 {
         struct perf_pmu *pmu = NULL;
         off_t offset = lseek(fd, 0, SEEK_CUR);
@@ -1074,13 +1074,14 @@ static int write_pmu_mappings(int fd, struct perf_header *h __used,
  * default get_cpuid(): nothing gets recorded
  * actual implementation must be in arch/$(ARCH)/util/header.c
  */
-int __attribute__((weak)) get_cpuid(char *buffer __used, size_t sz __used)
+int __attribute__ ((weak)) get_cpuid(char *buffer __maybe_unused,
+                                     size_t sz __maybe_unused)
 {
         return -1;
 }
 
-static int write_cpuid(int fd, struct perf_header *h __used,
-                       struct perf_evlist *evlist __used)
+static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
+                       struct perf_evlist *evlist __maybe_unused)
 {
         char buffer[64];
         int ret;
@@ -1094,8 +1095,9 @@ write_it:
         return do_write_string(fd, buffer);
 }
 
-static int write_branch_stack(int fd __used, struct perf_header *h __used,
-                       struct perf_evlist *evlist __used)
+static int write_branch_stack(int fd __maybe_unused,
+                              struct perf_header *h __maybe_unused,
+                       struct perf_evlist *evlist __maybe_unused)
 {
         return 0;
 }
@@ -1372,7 +1374,8 @@ static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
         free_event_desc(events);
 }
 
-static void print_total_mem(struct perf_header *h __used, int fd, FILE *fp)
+static void print_total_mem(struct perf_header *h __maybe_unused, int fd,
+                            FILE *fp)
 {
         uint64_t mem;
         ssize_t ret;
@@ -1390,7 +1393,8 @@ error:
         fprintf(fp, "# total memory : unknown\n");
 }
 
-static void print_numa_topology(struct perf_header *h __used, int fd, FILE *fp)
+static void print_numa_topology(struct perf_header *h __maybe_unused, int fd,
+                                FILE *fp)
 {
         ssize_t ret;
         u32 nr, c, i;
@@ -1450,7 +1454,8 @@ static void print_cpuid(struct perf_header *ph, int fd, FILE *fp)
         free(str);
 }
 
-static void print_branch_stack(struct perf_header *ph __used, int fd __used,
+static void print_branch_stack(struct perf_header *ph __maybe_unused,
+                               int fd __maybe_unused,
                                FILE *fp)
 {
         fprintf(fp, "# contains samples with branch stack\n");
@@ -1649,9 +1654,10 @@ out:
         return err;
 }
 
-static int process_tracing_data(struct perf_file_section *section __unused,
-                              struct perf_header *ph __unused,
-                              int feat __unused, int fd, void *data)
+static int process_tracing_data(struct perf_file_section *section
+                                __maybe_unused,
+                              struct perf_header *ph __maybe_unused,
+                              int feat __maybe_unused, int fd, void *data)
 {
         trace_report(fd, data, false);
         return 0;
@@ -1659,7 +1665,8 @@ static int process_tracing_data(struct perf_file_section *section __unused,
 
 static int process_build_id(struct perf_file_section *section,
                             struct perf_header *ph,
-                            int feat __unused, int fd, void *data __used)
+                            int feat __maybe_unused, int fd,
+                            void *data __maybe_unused)
 {
         if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
                 pr_debug("Failed to read buildids, continuing...\n");
@@ -1698,9 +1705,9 @@ perf_evlist__set_event_name(struct perf_evlist *evlist, struct perf_evsel *event
 }
 
 static int
-process_event_desc(struct perf_file_section *section __unused,
-                   struct perf_header *header, int feat __unused, int fd,
-                   void *data __used)
+process_event_desc(struct perf_file_section *section __maybe_unused,
+                   struct perf_header *header, int feat __maybe_unused, int fd,
+                   void *data __maybe_unused)
 {
         struct perf_session *session = container_of(header, struct perf_session, header);
         struct perf_evsel *evsel, *events = read_event_desc(header, fd);
@@ -2596,7 +2603,7 @@ int perf_event__synthesize_event_types(struct perf_tool *tool,
         return err;
 }
 
-int perf_event__process_event_type(struct perf_tool *tool __unused,
+int perf_event__process_event_type(struct perf_tool *tool __maybe_unused,
                                    union perf_event *event)
 {
         if (perf_header__push_event(event->event_type.event_type.event_id,
@@ -2613,7 +2620,7 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
         union perf_event ev;
         struct tracing_data *tdata;
         ssize_t size = 0, aligned_size = 0, padding;
-        int err __used = 0;
+        int err __maybe_unused = 0;
 
         /*
          * We are going to store the size of the data followed
@@ -2712,7 +2719,7 @@ int perf_event__synthesize_build_id(struct perf_tool *tool,
         return err;
 }
 
-int perf_event__process_build_id(struct perf_tool *tool __used,
+int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
                                  union perf_event *event,
                                  struct perf_session *session)
 {
diff --git a/tools/perf/util/help.c b/tools/perf/util/help.c
index 4fa764d8f7d7..8b1f6e891b8a 100644
--- a/tools/perf/util/help.c
+++ b/tools/perf/util/help.c
@@ -332,7 +332,8 @@ const char *help_unknown_cmd(const char *cmd)
         exit(1);
 }
 
-int cmd_version(int argc __used, const char **argv __used, const char *prefix __used)
+int cmd_version(int argc __maybe_unused, const char **argv __maybe_unused,
+                const char *prefix __maybe_unused)
 {
         printf("perf version %s\n", perf_version_string);
         return 0;
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 0ba65ad07cd1..6ec5398de89d 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -394,7 +394,7 @@ void hist_entry__free(struct hist_entry *he)
  * collapse the histogram
  */
 
-static bool hists__collapse_insert_entry(struct hists *hists __used,
+static bool hists__collapse_insert_entry(struct hists *hists __maybe_unused,
                                          struct rb_root *root,
                                          struct hist_entry *he)
 {
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 4146f51124f0..f011ad4756e8 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -156,20 +156,22 @@ struct perf_evlist;
 
 #ifdef NO_NEWT_SUPPORT
 static inline
-int perf_evlist__tui_browse_hists(struct perf_evlist *evlist __used,
-                                  const char *help __used,
-                                  void(*timer)(void *arg) __used,
-                                  void *arg __used,
-                                  int refresh __used)
+int perf_evlist__tui_browse_hists(struct perf_evlist *evlist __maybe_unused,
+                                  const char *help __maybe_unused,
+                                  void(*timer)(void *arg) __maybe_unused,
+                                  void *arg __maybe_unused,
+                                  int refresh __maybe_unused)
 {
         return 0;
 }
 
-static inline int hist_entry__tui_annotate(struct hist_entry *self __used,
-                                           int evidx __used,
-                                           void(*timer)(void *arg) __used,
-                                           void *arg __used,
-                                           int delay_secs __used)
+static inline int hist_entry__tui_annotate(struct hist_entry *self
+                                           __maybe_unused,
+                                           int evidx __maybe_unused,
+                                           void(*timer)(void *arg)
+                                           __maybe_unused,
+                                           void *arg __maybe_unused,
+                                           int delay_secs __maybe_unused)
 {
         return 0;
 }
@@ -187,11 +189,11 @@ int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help,
 
 #ifdef NO_GTK2_SUPPORT
 static inline
-int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist __used,
-                                  const char *help __used,
-                                  void(*timer)(void *arg) __used,
-                                  void *arg __used,
-                                  int refresh __used)
+int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist __maybe_unused,
+                                  const char *help __maybe_unused,
+                                  void(*timer)(void *arg) __maybe_unused,
+                                  void *arg __maybe_unused,
+                                  int refresh __maybe_unused)
 {
         return 0;
 }
diff --git a/tools/perf/util/include/linux/compiler.h b/tools/perf/util/include/linux/compiler.h
index ce2367b7b3f6..96b919dae11c 100644
--- a/tools/perf/util/include/linux/compiler.h
+++ b/tools/perf/util/include/linux/compiler.h
@@ -9,7 +9,9 @@
 #define __attribute_const__
 #endif
 
-#define __used          __attribute__((__unused__))
+#ifndef __maybe_unused
+#define __maybe_unused          __attribute__((unused))
+#endif
 #define __packed        __attribute__((__packed__))
 
 #ifndef __force
diff --git a/tools/perf/util/intlist.c b/tools/perf/util/intlist.c
index 77c504ff0088..9d0740024ba8 100644
--- a/tools/perf/util/intlist.c
+++ b/tools/perf/util/intlist.c
@@ -11,7 +11,7 @@
 
 #include "intlist.h"
 
-static struct rb_node *intlist__node_new(struct rblist *rblist __used,
+static struct rb_node *intlist__node_new(struct rblist *rblist __maybe_unused,
                                          const void *entry)
 {
         int i = (int)((long)entry);
@@ -31,7 +31,7 @@ static void int_node__delete(struct int_node *ilist)
         free(ilist);
 }
 
-static void intlist__node_delete(struct rblist *rblist __used,
+static void intlist__node_delete(struct rblist *rblist __maybe_unused,
                                  struct rb_node *rb_node)
 {
         struct int_node *node = container_of(rb_node, struct int_node, rb_node);
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index 25ab4cdbc446..d2250fc97e25 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -96,7 +96,7 @@ static inline u64 map__unmap_ip(struct map *map, u64 ip)
         return ip + map->start - map->pgoff;
 }
 
-static inline u64 identity__map_ip(struct map *map __used, u64 ip)
+static inline u64 identity__map_ip(struct map *map __maybe_unused, u64 ip)
 {
         return ip;
 }
diff --git a/tools/perf/util/parse-events-test.c b/tools/perf/util/parse-events-test.c
index bc8b65130ae0..d7244e553670 100644
--- a/tools/perf/util/parse-events-test.c
+++ b/tools/perf/util/parse-events-test.c
@@ -569,7 +569,7 @@ static int test__group2(struct perf_evlist *evlist)
         return 0;
 }
 
-static int test__group3(struct perf_evlist *evlist __used)
+static int test__group3(struct perf_evlist *evlist __maybe_unused)
 {
         struct perf_evsel *evsel, *leader;
 
@@ -648,7 +648,7 @@ static int test__group3(struct perf_evlist *evlist __used)
         return 0;
 }
 
-static int test__group4(struct perf_evlist *evlist __used)
+static int test__group4(struct perf_evlist *evlist __maybe_unused)
 {
         struct perf_evsel *evsel, *leader;
 
@@ -684,7 +684,7 @@ static int test__group4(struct perf_evlist *evlist __used)
         return 0;
 }
 
-static int test__group5(struct perf_evlist *evlist __used)
+static int test__group5(struct perf_evlist *evlist __maybe_unused)
 {
         struct perf_evsel *evsel, *leader;
 
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index a031ee1f54f6..44afcf40f796 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -807,7 +807,8 @@ int parse_events_terms(struct list_head *terms, const char *str)
         return ret;
 }
 
-int parse_events(struct perf_evlist *evlist, const char *str, int unset __used)
+int parse_events(struct perf_evlist *evlist, const char *str,
+                 int unset __maybe_unused)
 {
         struct parse_events_data__events data = {
                 .list = LIST_HEAD_INIT(data.list),
@@ -833,14 +834,14 @@ int parse_events(struct perf_evlist *evlist, const char *str, int unset __used)
 }
 
 int parse_events_option(const struct option *opt, const char *str,
-                        int unset __used)
+                        int unset __maybe_unused)
 {
         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
         return parse_events(evlist, str, unset);
 }
 
 int parse_filter(const struct option *opt, const char *str,
-                 int unset __used)
+                 int unset __maybe_unused)
 {
         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
         struct perf_evsel *last = NULL;
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index f5e28dc68270..c87efc12579d 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -207,7 +207,7 @@ r{num_raw_hex}		{ return raw(yyscanner); }
 
 %%
 
-int parse_events_wrap(void *scanner __used)
+int parse_events_wrap(void *scanner __maybe_unused)
 {
         return 1;
 }
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 42d9a17b83b1..cd88209e3c58 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -391,7 +391,7 @@ sep_slash_dc: '/' | ':' |
 
 %%
 
-void parse_events_error(void *data __used, void *scanner __used,
-                        char const *msg __used)
+void parse_events_error(void *data __maybe_unused, void *scanner __maybe_unused,
+                        char const *msg __maybe_unused)
 {
 }
diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c
index 594f8fad5ecd..443fc116512b 100644
--- a/tools/perf/util/parse-options.c
+++ b/tools/perf/util/parse-options.c
@@ -557,7 +557,8 @@ int parse_options_usage(const char * const *usagestr,
 }
 
 
-int parse_opt_verbosity_cb(const struct option *opt, const char *arg __used,
+int parse_opt_verbosity_cb(const struct option *opt,
+                           const char *arg __maybe_unused,
                            int unset)
 {
         int *target = opt->value;
diff --git a/tools/perf/util/perf_regs.h b/tools/perf/util/perf_regs.h
index 9bd6c4e069c8..316dbe7f86ed 100644
--- a/tools/perf/util/perf_regs.h
+++ b/tools/perf/util/perf_regs.h
@@ -6,7 +6,7 @@
 #else
 #define PERF_REGS_MASK  0
 
-static inline const char *perf_reg_name(int id __used)
+static inline const char *perf_reg_name(int id __maybe_unused)
 {
         return NULL;
 }
diff --git a/tools/perf/util/pmu.y b/tools/perf/util/pmu.y
index 20ea77e93169..ec898047ebb9 100644
--- a/tools/perf/util/pmu.y
+++ b/tools/perf/util/pmu.y
@@ -86,8 +86,8 @@ PP_VALUE
 
 %%
 
-void perf_pmu_error(struct list_head *list __used,
-                    char *name __used,
-                    char const *msg __used)
+void perf_pmu_error(struct list_head *list __maybe_unused,
+                    char *name __maybe_unused,
+                    char const *msg __maybe_unused)
 {
 }
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index e8c72de0f70c..4ce04c2281d3 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -41,7 +41,7 @@
 #include "symbol.h"
 #include "thread.h"
 #include "debugfs.h"
-#include "trace-event.h"        /* For __unused */
+#include "trace-event.h"        /* For __maybe_unused */
 #include "probe-event.h"
 #include "probe-finder.h"
 #include "session.h"
@@ -647,8 +647,8 @@ static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
 }
 
 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
-                                struct probe_trace_event **tevs __unused,
-                                int max_tevs __unused, const char *target)
+                                struct probe_trace_event **tevs __maybe_unused,
+                                int max_tevs __maybe_unused, const char *target)
 {
         if (perf_probe_event_need_dwarf(pev)) {
                 pr_warning("Debuginfo-analysis is not supported.\n");
@@ -661,17 +661,18 @@ static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
         return 0;
 }
 
-int show_line_range(struct line_range *lr __unused, const char *module __unused)
+int show_line_range(struct line_range *lr __maybe_unused,
+                    const char *module __maybe_unused)
 {
         pr_warning("Debuginfo-analysis is not supported.\n");
         return -ENOSYS;
 }
 
-int show_available_vars(struct perf_probe_event *pevs __unused,
-                        int npevs __unused, int max_vls __unused,
-                        const char *module __unused,
-                        struct strfilter *filter __unused,
-                        bool externs __unused)
+int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
+                        int npevs __maybe_unused, int max_vls __maybe_unused,
+                        const char *module __maybe_unused,
+                        struct strfilter *filter __maybe_unused,
+                        bool externs __maybe_unused)
 {
         pr_warning("Debuginfo-analysis is not supported.\n");
         return -ENOSYS;
@@ -2183,7 +2184,7 @@ static struct strfilter *available_func_filter;
  * If a symbol corresponds to a function with global binding and
  * matches filter return 0. For all others return 1.
  */
-static int filter_available_functions(struct map *map __unused,
+static int filter_available_functions(struct map *map __maybe_unused,
                                       struct symbol *sym)
 {
         if (sym->binding == STB_GLOBAL &&
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index d448984ed789..526ba56e720b 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -207,7 +207,7 @@ static int debuginfo__init_online_kernel_dwarf(struct debuginfo *self,
 #else
 /* With older elfutils, this just support kernel module... */
 static int debuginfo__init_online_kernel_dwarf(struct debuginfo *self,
-                                               Dwarf_Addr addr __used)
+                                               Dwarf_Addr addr __maybe_unused)
 {
         const char *path = kernel_get_module_path("kernel");
 
@@ -1419,7 +1419,7 @@ static int line_range_add_line(const char *src, unsigned int lineno,
 }
 
 static int line_range_walk_cb(const char *fname, int lineno,
-                              Dwarf_Addr addr __used,
+                              Dwarf_Addr addr __maybe_unused,
                               void *data)
 {
         struct line_finder *lf = data;
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 27187f0b71f0..ca85444bcfbf 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -672,7 +672,7 @@ struct pyrf_evlist {
 };
 
 static int pyrf_evlist__init(struct pyrf_evlist *pevlist,
-                             PyObject *args, PyObject *kwargs __used)
+                             PyObject *args, PyObject *kwargs __maybe_unused)
 {
         PyObject *pcpus = NULL, *pthreads = NULL;
         struct cpu_map *cpus;
@@ -733,7 +733,8 @@ static PyObject *pyrf_evlist__poll(struct pyrf_evlist *pevlist,
 }
 
 static PyObject *pyrf_evlist__get_pollfd(struct pyrf_evlist *pevlist,
-                                         PyObject *args __used, PyObject *kwargs __used)
+                                         PyObject *args __maybe_unused,
+                                         PyObject *kwargs __maybe_unused)
 {
         struct perf_evlist *evlist = &pevlist->evlist;
         PyObject *list = PyList_New(0);
@@ -765,7 +766,8 @@ free_list:
 
 
 static PyObject *pyrf_evlist__add(struct pyrf_evlist *pevlist,
-                                  PyObject *args, PyObject *kwargs __used)
+                                  PyObject *args,
+                                  PyObject *kwargs __maybe_unused)
 {
         struct perf_evlist *evlist = &pevlist->evlist;
         PyObject *pevsel;
diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
index 94e673643bcb..ffde3e4e34aa 100644
--- a/tools/perf/util/scripting-engines/trace-event-perl.c
+++ b/tools/perf/util/scripting-engines/trace-event-perl.c
@@ -257,10 +257,10 @@ static inline struct event_format *find_cache_event(struct perf_evsel *evsel)
         return event;
 }
 
-static void perl_process_tracepoint(union perf_event *perf_event __unused,
+static void perl_process_tracepoint(union perf_event *perf_event __maybe_unused,
                                     struct perf_sample *sample,
                                     struct perf_evsel *evsel,
-                                    struct machine *machine __unused,
+                                    struct machine *machine __maybe_unused,
                                     struct addr_location *al)
 {
         struct format_field *field;
@@ -349,8 +349,8 @@ static void perl_process_tracepoint(union perf_event *perf_event __unused,
 static void perl_process_event_generic(union perf_event *event,
                                        struct perf_sample *sample,
                                        struct perf_evsel *evsel,
-                                       struct machine *machine __unused,
-                                       struct addr_location *al __unused)
+                                       struct machine *machine __maybe_unused,
+                                       struct addr_location *al __maybe_unused)
 {
         dSP;
 
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index afba09729183..730c6630cba5 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -221,10 +221,11 @@ static inline struct event_format *find_cache_event(struct perf_evsel *evsel)
         return event;
 }
 
-static void python_process_tracepoint(union perf_event *perf_event __unused,
+static void python_process_tracepoint(union perf_event *perf_event
+                                      __maybe_unused,
                                  struct perf_sample *sample,
                                  struct perf_evsel *evsel,
-                                 struct machine *machine __unused,
+                                 struct machine *machine __maybe_unused,
                                  struct addr_location *al)
 {
         PyObject *handler, *retval, *context, *t, *obj, *dict = NULL;
@@ -339,10 +340,11 @@ static void python_process_tracepoint(union perf_event *perf_event __unused,
         Py_DECREF(t);
 }
 
-static void python_process_general_event(union perf_event *perf_event __unused,
+static void python_process_general_event(union perf_event *perf_event
+                                         __maybe_unused,
                                          struct perf_sample *sample,
                                          struct perf_evsel *evsel,
-                                         struct machine *machine __unused,
+                                         struct machine *machine __maybe_unused,
                                          struct addr_location *al)
 {
         PyObject *handler, *retval, *t, *dict;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index e0fd6c71cc5f..3049b0ae7003 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -401,49 +401,53 @@ int machine__resolve_callchain(struct machine *machine,
 
 }
 
-static int process_event_synth_tracing_data_stub(union perf_event *event __used,
-                                                 struct perf_session *session __used)
+static int process_event_synth_tracing_data_stub(union perf_event *event
+                                                 __maybe_unused,
+                                                 struct perf_session *session
+                                                __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
 }
 
-static int process_event_synth_attr_stub(union perf_event *event __used,
-                                         struct perf_evlist **pevlist __used)
+static int process_event_synth_attr_stub(union perf_event *event __maybe_unused,
+                                         struct perf_evlist **pevlist
+                                         __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
 }
 
-static int process_event_sample_stub(struct perf_tool *tool __used,
-                                     union perf_event *event __used,
-                                     struct perf_sample *sample __used,
-                                     struct perf_evsel *evsel __used,
-                                     struct machine *machine __used)
+static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
+                                     union perf_event *event __maybe_unused,
+                                     struct perf_sample *sample __maybe_unused,
+                                     struct perf_evsel *evsel __maybe_unused,
+                                     struct machine *machine __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
 }
 
-static int process_event_stub(struct perf_tool *tool __used,
-                              union perf_event *event __used,
-                              struct perf_sample *sample __used,
-                              struct machine *machine __used)
+static int process_event_stub(struct perf_tool *tool __maybe_unused,
+                              union perf_event *event __maybe_unused,
+                              struct perf_sample *sample __maybe_unused,
+                              struct machine *machine __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
 }
 
-static int process_finished_round_stub(struct perf_tool *tool __used,
-                                       union perf_event *event __used,
-                                       struct perf_session *perf_session __used)
+static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
+                                       union perf_event *event __maybe_unused,
+                                       struct perf_session *perf_session
+                                       __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
 }
 
-static int process_event_type_stub(struct perf_tool *tool __used,
-                                   union perf_event *event __used)
+static int process_event_type_stub(struct perf_tool *tool __maybe_unused,
+                                   union perf_event *event __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
@@ -520,7 +524,7 @@ static void swap_sample_id_all(union perf_event *event, void *data)
 }
 
 static void perf_event__all64_swap(union perf_event *event,
-                                   bool sample_id_all __used)
+                                   bool sample_id_all __maybe_unused)
 {
         struct perf_event_header *hdr = &event->header;
         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
@@ -631,7 +635,7 @@ void perf_event__attr_swap(struct perf_event_attr *attr)
 }
 
 static void perf_event__hdr_attr_swap(union perf_event *event,
-                                      bool sample_id_all __used)
+                                      bool sample_id_all __maybe_unused)
 {
         size_t size;
 
@@ -643,14 +647,14 @@ static void perf_event__hdr_attr_swap(union perf_event *event,
 }
 
 static void perf_event__event_type_swap(union perf_event *event,
-                                        bool sample_id_all __used)
+                                        bool sample_id_all __maybe_unused)
 {
         event->event_type.event_type.event_id =
                 bswap_64(event->event_type.event_type.event_id);
 }
 
 static void perf_event__tracing_data_swap(union perf_event *event,
-                                          bool sample_id_all __used)
+                                          bool sample_id_all __maybe_unused)
 {
         event->tracing_data.size = bswap_32(event->tracing_data.size);
 }
@@ -791,7 +795,7 @@ static int flush_sample_queue(struct perf_session *s,
  *      etc...
  */
 static int process_finished_round(struct perf_tool *tool,
-                                  union perf_event *event __used,
+                                  union perf_event *event __maybe_unused,
                                   struct perf_session *session)
 {
         int ret = flush_sample_queue(session, tool);
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 7a2fbd8855b7..0981bc7a2917 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -170,7 +170,7 @@ static int hist_entry__dso_snprintf(struct hist_entry *self, char *bf,
 
 static int _hist_entry__sym_snprintf(struct map *map, struct symbol *sym,
                                      u64 ip, char level, char *bf, size_t size,
-                                     unsigned int width __used)
+                                     unsigned int width __maybe_unused)
 {
         size_t ret = 0;
 
@@ -205,7 +205,8 @@ struct sort_entry sort_dso = {
 };
 
 static int hist_entry__sym_snprintf(struct hist_entry *self, char *bf,
-                                    size_t size, unsigned int width __used)
+                                    size_t size,
+                                    unsigned int width __maybe_unused)
 {
         return _hist_entry__sym_snprintf(self->ms.map, self->ms.sym, self->ip,
                                          self->level, bf, size, width);
@@ -248,7 +249,8 @@ sort__srcline_cmp(struct hist_entry *left, struct hist_entry *right)
 }
 
 static int hist_entry__srcline_snprintf(struct hist_entry *self, char *bf,
-                                   size_t size, unsigned int width __used)
+                                        size_t size,
+                                        unsigned int width __maybe_unused)
 {
         FILE *fp;
         char cmd[PATH_MAX + 2], *path = self->srcline, *nl;
@@ -397,7 +399,8 @@ sort__sym_to_cmp(struct hist_entry *left, struct hist_entry *right)
 }
 
 static int hist_entry__sym_from_snprintf(struct hist_entry *self, char *bf,
-                                    size_t size, unsigned int width __used)
+                                        size_t size,
+                                        unsigned int width __maybe_unused)
 {
         struct addr_map_symbol *from = &self->branch_info->from;
         return _hist_entry__sym_snprintf(from->map, from->sym, from->addr,
@@ -406,7 +409,8 @@ static int hist_entry__sym_from_snprintf(struct hist_entry *self, char *bf,
 }
 
 static int hist_entry__sym_to_snprintf(struct hist_entry *self, char *bf,
-                                    size_t size, unsigned int width __used)
+                                       size_t size,
+                                       unsigned int width __maybe_unused)
 {
         struct addr_map_symbol *to = &self->branch_info->to;
         return _hist_entry__sym_snprintf(to->map, to->sym, to->addr,
diff --git a/tools/perf/util/symbol-minimal.c b/tools/perf/util/symbol-minimal.c
index 6738ea128c90..259f8f2ea9c9 100644
--- a/tools/perf/util/symbol-minimal.c
+++ b/tools/perf/util/symbol-minimal.c
@@ -69,8 +69,9 @@ static int read_build_id(void *note_data, size_t note_len, void *bf,
         return -1;
 }
 
-int filename__read_debuglink(const char *filename __used,
-                             char *debuglink __used, size_t size __used)
+int filename__read_debuglink(const char *filename __maybe_unused,
+                             char *debuglink __maybe_unused,
+                             size_t size __maybe_unused)
 {
         return -1;
 }
@@ -241,7 +242,8 @@ out:
         return ret;
 }
 
-int symsrc__init(struct symsrc *ss, struct dso *dso __used, const char *name,
+int symsrc__init(struct symsrc *ss, struct dso *dso __maybe_unused,
+                 const char *name,
                  enum dso_binary_type type)
 {
         int fd = open(name, O_RDONLY);
@@ -260,13 +262,13 @@ out_close:
         return -1;
 }
 
-bool symsrc__possibly_runtime(struct symsrc *ss __used)
+bool symsrc__possibly_runtime(struct symsrc *ss __maybe_unused)
 {
         /* Assume all sym sources could be a runtime image. */
         return true;
 }
 
-bool symsrc__has_symtab(struct symsrc *ss __used)
+bool symsrc__has_symtab(struct symsrc *ss __maybe_unused)
 {
         return false;
 }
@@ -277,17 +279,19 @@ void symsrc__destroy(struct symsrc *ss)
         close(ss->fd);
 }
 
-int dso__synthesize_plt_symbols(struct dso *dso __used,
-                                struct symsrc *ss __used,
-                                struct map *map __used,
-                                symbol_filter_t filter __used)
+int dso__synthesize_plt_symbols(struct dso *dso __maybe_unused,
+                                struct symsrc *ss __maybe_unused,
+                                struct map *map __maybe_unused,
+                                symbol_filter_t filter __maybe_unused)
 {
         return 0;
 }
 
-int dso__load_sym(struct dso *dso, struct map *map __used, struct symsrc *ss,
-                  struct symsrc *runtime_ss __used,
-                  symbol_filter_t filter __used, int kmodule __used)
+int dso__load_sym(struct dso *dso, struct map *map __maybe_unused,
+                  struct symsrc *ss,
+                  struct symsrc *runtime_ss __maybe_unused,
+                  symbol_filter_t filter __maybe_unused,
+                  int kmodule __maybe_unused)
 {
         unsigned char *build_id[BUILD_ID_SIZE];
 
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index bbb24e951656..e2e8c697cffe 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1755,7 +1755,7 @@ struct process_args {
 };
 
 static int symbol__in_kernel(void *arg, const char *name,
-                             char type __used, u64 start)
+                             char type __maybe_unused, u64 start)
 {
         struct process_args *args = arg;
 
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index dde8a26f7be3..4ff45e30c726 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -21,14 +21,15 @@
 #ifdef HAVE_CPLUS_DEMANGLE
 extern char *cplus_demangle(const char *, int);
 
-static inline char *bfd_demangle(void __used *v, const char *c, int i)
+static inline char *bfd_demangle(void __maybe_unused *v, const char *c, int i)
 {
         return cplus_demangle(c, i);
 }
 #else
 #ifdef NO_DEMANGLE
-static inline char *bfd_demangle(void __used *v, const char __used *c,
-                                 int __used i)
+static inline char *bfd_demangle(void __maybe_unused *v,
+                                 const char __maybe_unused *c,
+                                 int __maybe_unused i)
 {
         return NULL;
 }
diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index a5a554efeb50..aa4c860a21d1 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -221,7 +221,7 @@ void print_event(struct pevent *pevent, int cpu, void *data, int size,
 }
 
 void parse_proc_kallsyms(struct pevent *pevent,
-                         char *file, unsigned int size __unused)
+                         char *file, unsigned int size __maybe_unused)
 {
         unsigned long long addr;
         char *func;
@@ -253,7 +253,7 @@ void parse_proc_kallsyms(struct pevent *pevent,
 }
 
 void parse_ftrace_printk(struct pevent *pevent,
-                         char *file, unsigned int size __unused)
+                         char *file, unsigned int size __maybe_unused)
 {
         unsigned long long addr;
         char *printk;
diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trace-event-scripting.c
index 302ff262494c..8715a1006d00 100644
--- a/tools/perf/util/trace-event-scripting.c
+++ b/tools/perf/util/trace-event-scripting.c
@@ -35,11 +35,11 @@ static int stop_script_unsupported(void)
         return 0;
 }
 
-static void process_event_unsupported(union perf_event *event __unused,
-                                      struct perf_sample *sample __unused,
-                                      struct perf_evsel *evsel __unused,
-                                      struct machine *machine __unused,
-                                      struct addr_location *al __unused)
+static void process_event_unsupported(union perf_event *event __maybe_unused,
+                                      struct perf_sample *sample __maybe_unused,
+                                      struct perf_evsel *evsel __maybe_unused,
+                                      struct machine *machine __maybe_unused,
+                                      struct addr_location *al __maybe_unused)
 {
 }
 
@@ -52,17 +52,19 @@ static void print_python_unsupported_msg(void)
                 "\n  etc.\n");
 }
 
-static int python_start_script_unsupported(const char *script __unused,
-                                           int argc __unused,
-                                           const char **argv __unused)
+static int python_start_script_unsupported(const char *script __maybe_unused,
+                                           int argc __maybe_unused,
+                                           const char **argv __maybe_unused)
 {
         print_python_unsupported_msg();
 
         return -1;
 }
 
-static int python_generate_script_unsupported(struct pevent *pevent __unused,
-                                              const char *outfile __unused)
+static int python_generate_script_unsupported(struct pevent *pevent
+                                              __maybe_unused,
+                                              const char *outfile
+                                              __maybe_unused)
 {
         print_python_unsupported_msg();
 
@@ -114,17 +116,18 @@ static void print_perl_unsupported_msg(void)
                 "\n  etc.\n");
 }
 
-static int perl_start_script_unsupported(const char *script __unused,
-                                         int argc __unused,
-                                         const char **argv __unused)
+static int perl_start_script_unsupported(const char *script __maybe_unused,
+                                         int argc __maybe_unused,
+                                         const char **argv __maybe_unused)
 {
         print_perl_unsupported_msg();
 
         return -1;
 }
 
-static int perl_generate_script_unsupported(struct pevent *pevent __unused,
-                                            const char *outfile __unused)
+static int perl_generate_script_unsupported(struct pevent *pevent
+                                            __maybe_unused,
+                                            const char *outfile __maybe_unused)
 {
         print_perl_unsupported_msg();
 
diff --git a/tools/perf/util/unwind.c b/tools/perf/util/unwind.c
index 00a42aa8d5c1..958723ba3d2e 100644
--- a/tools/perf/util/unwind.c
+++ b/tools/perf/util/unwind.c
@@ -307,32 +307,36 @@ find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
                                          need_unwind_info, arg);
 }
 
-static int access_fpreg(unw_addr_space_t __used as, unw_regnum_t __used num,
-                        unw_fpreg_t __used *val, int __used __write,
-                        void __used *arg)
+static int access_fpreg(unw_addr_space_t __maybe_unused as,
+                        unw_regnum_t __maybe_unused num,
+                        unw_fpreg_t __maybe_unused *val,
+                        int __maybe_unused __write,
+                        void __maybe_unused *arg)
 {
         pr_err("unwind: access_fpreg unsupported\n");
         return -UNW_EINVAL;
 }
 
-static int get_dyn_info_list_addr(unw_addr_space_t __used as,
-                                  unw_word_t __used *dil_addr,
-                                  void __used *arg)
+static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
+                                  unw_word_t __maybe_unused *dil_addr,
+                                  void __maybe_unused *arg)
 {
         return -UNW_ENOINFO;
 }
 
-static int resume(unw_addr_space_t __used as, unw_cursor_t __used *cu,
-                  void __used *arg)
+static int resume(unw_addr_space_t __maybe_unused as,
+                  unw_cursor_t __maybe_unused *cu,
+                  void __maybe_unused *arg)
 {
         pr_err("unwind: resume unsupported\n");
         return -UNW_EINVAL;
 }
 
 static int
-get_proc_name(unw_addr_space_t __used as, unw_word_t __used addr,
-                char __used *bufp, size_t __used buf_len,
-                unw_word_t __used *offp, void __used *arg)
+get_proc_name(unw_addr_space_t __maybe_unused as,
+              unw_word_t __maybe_unused addr,
+                char __maybe_unused *bufp, size_t __maybe_unused buf_len,
+                unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
 {
         pr_err("unwind: get_proc_name unsupported\n");
         return -UNW_EINVAL;
@@ -377,7 +381,7 @@ static int reg_value(unw_word_t *valp, struct regs_dump *regs, int id,
         return 0;
 }
 
-static int access_mem(unw_addr_space_t __used as,
+static int access_mem(unw_addr_space_t __maybe_unused as,
                       unw_word_t addr, unw_word_t *valp,
                       int __write, void *arg)
 {
@@ -422,7 +426,7 @@ static int access_mem(unw_addr_space_t __used as,
         return 0;
 }
 
-static int access_reg(unw_addr_space_t __used as,
+static int access_reg(unw_addr_space_t __maybe_unused as,
                       unw_regnum_t regnum, unw_word_t *valp,
                       int __write, void *arg)
 {
@@ -454,9 +458,9 @@ static int access_reg(unw_addr_space_t __used as,
         return 0;
 }
 
-static void put_unwind_info(unw_addr_space_t __used as,
-                            unw_proc_info_t *pi __used,
-                            void *arg __used)
+static void put_unwind_info(unw_addr_space_t __maybe_unused as,
+                            unw_proc_info_t *pi __maybe_unused,
+                            void *arg __maybe_unused)
 {
         pr_debug("unwind: put_unwind_info called\n");
 }
diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h
index 919bd6ad8501..a78c8b303bb5 100644
--- a/tools/perf/util/unwind.h
+++ b/tools/perf/util/unwind.h
@@ -22,11 +22,12 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
 int unwind__arch_reg_id(int regnum);
 #else
 static inline int
-unwind__get_entries(unwind_entry_cb_t cb __used, void *arg __used,
-                    struct machine *machine __used,
-                    struct thread *thread __used,
-                    u64 sample_uregs __used,
-                    struct perf_sample *data __used)
+unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
+                    void *arg __maybe_unused,
+                    struct machine *machine __maybe_unused,
+                    struct thread *thread __maybe_unused,
+                    u64 sample_uregs __maybe_unused,
+                    struct perf_sample *data __maybe_unused)
 {
         return 0;
 }
diff --git a/tools/perf/util/wrapper.c b/tools/perf/util/wrapper.c
index 73e900edb5a2..19f15b650703 100644
--- a/tools/perf/util/wrapper.c
+++ b/tools/perf/util/wrapper.c
@@ -7,7 +7,8 @@
  * There's no pack memory to release - but stay close to the Git
  * version so wrap this away:
  */
-static inline void release_pack_memory(size_t size __used, int flag __used)
+static inline void release_pack_memory(size_t size __maybe_unused,
+                                       int flag __maybe_unused)
 {
 }