perf pmu: Simplify arguments of __perf_pmu__new_alias

Simplify the arguments of __perf_pmu__new_alias() by passing the whole
'struct pme_event' pointer.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210427070139.25256-4-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/pmu.c

@@ -306,18 +306,25 @@ static bool perf_pmu_merge_alias(struct perf_pmu_alias *newalias,
 }
 
 static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
-				 char *desc, char *val,
-				 char *long_desc, char *topic,
-				 char *unit, char *perpkg,
-				 char *metric_expr,
-				 char *metric_name,
-				 char *deprecated)
+				 char *desc, char *val, struct pmu_event *pe)
 {
 	struct parse_events_term *term;
 	struct perf_pmu_alias *alias;
 	int ret;
 	int num;
 	char newval[256];
+	char *long_desc = NULL, *topic = NULL, *unit = NULL, *perpkg = NULL,
+	     *metric_expr = NULL, *metric_name = NULL, *deprecated = NULL;
+
+	if (pe) {
+		long_desc = (char *)pe->long_desc;
+		topic = (char *)pe->topic;
+		unit = (char *)pe->unit;
+		perpkg = (char *)pe->perpkg;
+		metric_expr = (char *)pe->metric_expr;
+		metric_name = (char *)pe->metric_name;
+		deprecated = (char *)pe->deprecated;
+	}
 
 	alias = malloc(sizeof(*alias));
 	if (!alias)
@@ -406,8 +413,7 @@ static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FI
 	/* Remove trailing newline from sysfs file */
 	strim(buf);
 
-	return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL, NULL, NULL,
-				     NULL, NULL, NULL, NULL);
+	return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL);
 }
 
 static inline bool pmu_alias_info_file(char *name)
@@ -798,11 +804,7 @@ void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu,
 		/* need type casts to override 'const' */
 		__perf_pmu__new_alias(head, NULL, (char *)pe->name,
 				(char *)pe->desc, (char *)pe->event,
-				(char *)pe->long_desc, (char *)pe->topic,
-				(char *)pe->unit, (char *)pe->perpkg,
-				(char *)pe->metric_expr,
-				(char *)pe->metric_name,
-				(char *)pe->deprecated);
+				pe);
 	}
 }
 
@@ -869,13 +871,7 @@ static int pmu_add_sys_aliases_iter_fn(struct pmu_event *pe, void *data)
 				      (char *)pe->name,
 				      (char *)pe->desc,
 				      (char *)pe->event,
-				      (char *)pe->long_desc,
-				      (char *)pe->topic,
-				      (char *)pe->unit,
-				      (char *)pe->perpkg,
-				      (char *)pe->metric_expr,
-				      (char *)pe->metric_name,
-				      (char *)pe->deprecated);
+				      pe);
 	}
 
 	return 0;