perf pmu-events: Change deprecated to be a bool

Switch to a more natural bool rather than string encoding, where NULL
implicitly meant false.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Link: https://lore.kernel.org/r/20230219092848.639226-6-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/pmu-events/jevents.py

@@ -678,7 +678,7 @@ static void decompress_event(int offset, struct pmu_event *pe)
 {
 \tconst char *p = &big_c_string[offset];
 """)
-  enum_attributes = ['aggr_mode']
+  enum_attributes = ['aggr_mode', 'deprecated']
   for attr in _json_event_attributes:
     _args.output_file.write(f'\n\tpe->{attr} = ')
     if attr in enum_attributes:

tools/perf/pmu-events/pmu-events.h

@@ -2,6 +2,8 @@
 #ifndef PMU_EVENTS_H
 #define PMU_EVENTS_H
 
+#include <stdbool.h>
+
 struct perf_pmu;
 
 enum aggr_mode_class {
@@ -22,7 +24,7 @@ struct pmu_event {
 	const char *pmu;
 	const char *unit;
 	const char *perpkg;
-	const char *deprecated;
+	bool deprecated;
 };
 
 struct pmu_metric {

tools/perf/tests/pmu-events.c

@@ -331,8 +331,8 @@ static int compare_pmu_events(const struct pmu_event *e1, const struct pmu_event
 		return -1;
 	}
 
-	if (!is_same(e1->deprecated, e2->deprecated)) {
-		pr_debug2("testing event e1 %s: mismatched deprecated, %s vs %s\n",
+	if (e1->deprecated != e2->deprecated) {
+		pr_debug2("testing event e1 %s: mismatched deprecated, %d vs %d\n",
 			  e1->name, e1->deprecated, e2->deprecated);
 		return -1;
 	}

tools/perf/util/pmu.c

@@ -331,14 +331,15 @@ static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
 	int num;
 	char newval[256];
 	char *long_desc = NULL, *topic = NULL, *unit = NULL, *perpkg = NULL,
-	     *deprecated = NULL, *pmu_name = NULL;
+	     *pmu_name = NULL;
+	bool deprecated = false;
 
 	if (pe) {
 		long_desc = (char *)pe->long_desc;
 		topic = (char *)pe->topic;
 		unit = (char *)pe->unit;
 		perpkg = (char *)pe->perpkg;
-		deprecated = (char *)pe->deprecated;
+		deprecated = pe->deprecated;
 		pmu_name = (char *)pe->pmu;
 	}
 
@@ -351,7 +352,7 @@ static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
 	alias->unit[0] = '\0';
 	alias->per_pkg = false;
 	alias->snapshot = false;
-	alias->deprecated = false;
+	alias->deprecated = deprecated;
 
 	ret = parse_events_terms(&alias->terms, val);
 	if (ret) {
@@ -405,9 +406,6 @@ static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
 	alias->str = strdup(newval);
 	alias->pmu_name = pmu_name ? strdup(pmu_name) : NULL;
 
-	if (deprecated)
-		alias->deprecated = true;
-
 	if (!perf_pmu_merge_alias(alias, list))
 		list_add_tail(&alias->list, list);