[RFT PATCH v2 4/7] perf-x86: iostat: Change iostat_prefix() to static

[Yushan Wang <wangyushan12@huawei.com>]

Change iostat_prefix() to static function, since it is not used outside.

Signed-off-by: Yushan Wang <wangyushan12@huawei.com>
---
 tools/perf/util/iostat.c     |  7 ------
 tools/perf/util/iostat.h     |  2 --
 tools/perf/util/x86-iostat.c | 44 ++++++++++++++++++------------------
 3 files changed, 22 insertions(+), 31 deletions(-)

diff --git a/tools/perf/util/iostat.c b/tools/perf/util/iostat.c
index b770bd473af7..a68ab100780d 100644
--- a/tools/perf/util/iostat.c
+++ b/tools/perf/util/iostat.c
@@ -37,13 +37,6 @@ __weak void iostat_print_metric(struct perf_stat_config *config __maybe_unused,
 {
 }
 
-__weak void iostat_prefix(struct evlist *evlist __maybe_unused,
-			  struct perf_stat_config *config __maybe_unused,
-			  char *prefix __maybe_unused,
-			  struct timespec *ts __maybe_unused)
-{
-}
-
 __weak void iostat_print_counters(struct evlist *evlist __maybe_unused,
 				  struct perf_stat_config *config __maybe_unused,
 				  struct timespec *ts __maybe_unused,
diff --git a/tools/perf/util/iostat.h b/tools/perf/util/iostat.h
index a4e7299c5c2f..820930a096d9 100644
--- a/tools/perf/util/iostat.h
+++ b/tools/perf/util/iostat.h
@@ -35,8 +35,6 @@ int iostat_parse(const struct option *opt, const char *str,
 		 int unset __maybe_unused);
 void iostat_list(struct evlist *evlist, struct perf_stat_config *config);
 void iostat_release(struct evlist *evlist);
-void iostat_prefix(struct evlist *evlist, struct perf_stat_config *config,
-		   char *prefix, struct timespec *ts);
 void iostat_print_header_prefix(struct perf_stat_config *config);
 void iostat_print_metric(struct perf_stat_config *config, struct evsel *evsel,
 			 struct perf_stat_output_ctx *out);
diff --git a/tools/perf/util/x86-iostat.c b/tools/perf/util/x86-iostat.c
index 7442a2cd87ed..f8d4c9718594 100644
--- a/tools/perf/util/x86-iostat.c
+++ b/tools/perf/util/x86-iostat.c
@@ -332,6 +332,28 @@ static int iostat_event_group(struct evlist *evl,
 	return ret;
 }
 
+static void iostat_prefix(struct evlist *evlist,
+			  struct perf_stat_config *config,
+			  char *prefix, struct timespec *ts)
+{
+	struct iio_root_port *rp = evlist->selected->priv;
+
+	if (rp) {
+		/*
+		 * TODO: This is the incorrect format in JSON mode.
+		 *       See prepare_timestamp()
+		 */
+		if (ts)
+			sprintf(prefix, "%6lu.%09lu%s%04x:%02x%s",
+				ts->tv_sec, ts->tv_nsec,
+				config->csv_sep, rp->domain, rp->bus,
+				config->csv_sep);
+		else
+			sprintf(prefix, "%04x:%02x%s", rp->domain, rp->bus,
+				config->csv_sep);
+	}
+}
+
 int iostat_prepare(struct evlist *evlist, struct perf_stat_config *config)
 {
 	if (evlist->core.nr_entries > 0) {
@@ -396,28 +418,6 @@ void iostat_release(struct evlist *evlist)
 	}
 }
 
-void iostat_prefix(struct evlist *evlist,
-		   struct perf_stat_config *config,
-		   char *prefix, struct timespec *ts)
-{
-	struct iio_root_port *rp = evlist->selected->priv;
-
-	if (rp) {
-		/*
-		 * TODO: This is the incorrect format in JSON mode.
-		 *       See prepare_timestamp()
-		 */
-		if (ts)
-			sprintf(prefix, "%6lu.%09lu%s%04x:%02x%s",
-				ts->tv_sec, ts->tv_nsec,
-				config->csv_sep, rp->domain, rp->bus,
-				config->csv_sep);
-		else
-			sprintf(prefix, "%04x:%02x%s", rp->domain, rp->bus,
-				config->csv_sep);
-	}
-}
-
 void iostat_print_header_prefix(struct perf_stat_config *config)
 {
 	if (config->csv_output)
-- 
2.33.0