perf tool: Constify tool pointers

The tool pointer (to a struct largely of function pointers) is passed
around but is unchanged except at initialization. Change parameter and
variable types to be const to lower the possibilities of what could
happen with a tool.

Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Leo Yan <leo.yan@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: Sun Haiyong <sunhaiyong@loongson.cn>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Yicong Yang <yangyicong@hisilicon.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20240812204720.631678-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/tools/perf/util/hisi-ptt.c b/tools/perf/util/hisi-ptt.c
index 37ea987017f6..e4cc4785f744 100644
--- a/tools/perf/util/hisi-ptt.c
+++ b/tools/perf/util/hisi-ptt.c
@@ -79,14 +79,14 @@ static void hisi_ptt_dump_event(struct hisi_ptt *ptt, unsigned char *buf,
 static int hisi_ptt_process_event(struct perf_session *session __maybe_unused,
 				  union perf_event *event __maybe_unused,
 				  struct perf_sample *sample __maybe_unused,
-				  struct perf_tool *tool __maybe_unused)
+				  const struct perf_tool *tool __maybe_unused)
 {
 	return 0;
 }
 
 static int hisi_ptt_process_auxtrace_event(struct perf_session *session,
 					   union perf_event *event,
-					   struct perf_tool *tool __maybe_unused)
+					   const struct perf_tool *tool __maybe_unused)
 {
 	struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt,
 					    auxtrace);
@@ -123,7 +123,7 @@ static int hisi_ptt_process_auxtrace_event(struct perf_session *session,
 }
 
 static int hisi_ptt_flush(struct perf_session *session __maybe_unused,
-			  struct perf_tool *tool __maybe_unused)
+			  const struct perf_tool *tool __maybe_unused)
 {
 	return 0;
 }