[PATCH 1/1] perf jevents: Add __maybe_unused attribute to unused function arg

From: Arnaldo Carvalho de Melo
Date: Tue Sep 28 2021 - 13:15:01 EST

The tools/perf/pmu-events/jevents.c file isn't being compiled with
-Werror and -Wextra, which will be the case soon, so before we turn
those compiler flags on, fix what it would flag.

Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Like Xu <like.xu.linux@xxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
To: John Garry <john.garry@xxxxxxxxxx>
tools/perf/pmu-events/jevents.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index 6731b3cf0c2fc9b7..323e1dfe2436c049 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -45,6 +45,7 @@
#include <sys/resource.h> /* getrlimit */
#include <ftw.h>
#include <sys/stat.h>
+#include <linux/compiler.h>
#include <linux/list.h>
#include "jsmn.h"
#include "json.h"
@@ -470,7 +471,7 @@ static void free_arch_std_events(void)

-static int save_arch_std_events(void *data, struct json_event *je)
+static int save_arch_std_events(void *data __maybe_unused, struct json_event *je)
struct event_struct *es;