perf parse-events: Introduce 'struct parse_events_terms'

parse_events_terms() existed in function names but was passed a
'struct list_head'.

As many parse_events functions take an evsel_config list as well as a
parse_event_term list, and the naming head_terms and head_config is
inconsistent, there's a potential to switch the lists and get errors.

Introduce a 'struct parse_events_terms', that just wraps a list_head, to
avoid this. Add the regular init/exit functions and transition the code
to use them.

Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230901233949.2930562-6-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 4d7947fb4a98..bf74d6564eba 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -113,7 +113,7 @@ static void free_list_evsel(struct list_head* list_evsel)
 	u64 num;
 	enum parse_events__term_type term_type;
 	struct list_head *list_evsel;
-	struct list_head *list_terms;
+	struct parse_events_terms *list_terms;
 	struct parse_events_term *term;
 	struct tracepoint_name {
 		char *sys;
@@ -644,26 +644,26 @@ start_terms: event_config
 event_config:
 event_config ',' event_term
 {
-	struct list_head *head = $1;
+	struct parse_events_terms *head = $1;
 	struct parse_events_term *term = $3;
 
 	if (!head) {
 		parse_events_term__delete(term);
 		YYABORT;
 	}
-	list_add_tail(&term->list, head);
+	list_add_tail(&term->list, &head->terms);
 	$$ = $1;
 }
 |
 event_term
 {
-	struct list_head *head = malloc(sizeof(*head));
+	struct parse_events_terms *head = malloc(sizeof(*head));
 	struct parse_events_term *term = $1;
 
 	if (!head)
 		YYNOMEM;
-	INIT_LIST_HEAD(head);
-	list_add_tail(&term->list, head);
+	parse_events_terms__init(head);
+	list_add_tail(&term->list, &head->terms);
 	$$ = head;
 }