[PATCH v2 1/2] perf jevents: Fix some would-be warnings

From: John Garry
Date: Thu Oct 21 2021 - 05:22:06 EST


Before enabling warnings through HOSTCFLAGS, fix the would-be warnings:

HOSTCC pmu-events/jevents.o
pmu-events/jevents.c:74:22: warning: no previous prototype for ‘convert’ [-Wmissing-prototypes]
74 | enum aggr_mode_class convert(const char *aggr_mode)
| ^~~~~~~
pmu-events/jevents.c: In function ‘print_events_table_entry’:
pmu-events/jevents.c:373:8: warning: declaration of ‘topic’ shadows a global declaration [-Wshadow]
373 | char *topic = pd->topic;
| ^~~~~
pmu-events/jevents.c:316:14: note: shadowed declaration is here
316 | static char *topic;
| ^~~~~
pmu-events/jevents.c: In function ‘json_events’:
pmu-events/jevents.c:554:9: warning: declaration of ‘func’ shadows a global declaration [-Wshadow]
554 | int (*func)(void *data, struct json_event *je),
| ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pmu-events/jevents.c:85:15: note: shadowed declaration is here
85 | typedef int (*func)(void *data, struct json_event *je);
| ^~~~
pmu-events/jevents.c: In function ‘main’:
pmu-events/jevents.c:1211:25: warning: initialization discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
1211 | char *err_string_ext = "";
| ^~
pmu-events/jevents.c:1304:17: warning: assignment discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
1304 | err_string_ext = " for std arch event";
| ^

Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
---
tools/perf/pmu-events/jevents.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index b7c8aae6bcf1..70eacc22dfef 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -71,7 +71,7 @@ struct json_event {
char *metric_constraint;
};

-enum aggr_mode_class convert(const char *aggr_mode)
+static enum aggr_mode_class convert(const char *aggr_mode)
{
if (!strcmp(aggr_mode, "PerCore"))
return PerCore;
@@ -82,8 +82,6 @@ enum aggr_mode_class convert(const char *aggr_mode)
return -1;
}

-typedef int (*func)(void *data, struct json_event *je);
-
static LIST_HEAD(sys_event_tables);

struct sys_event_table {
@@ -370,7 +368,7 @@ static int print_events_table_entry(void *data, struct json_event *je)
{
struct perf_entry_data *pd = data;
FILE *outfp = pd->outfp;
- char *topic = pd->topic;
+ char *topic_local = pd->topic;

/*
* TODO: Remove formatting chars after debugging to reduce
@@ -385,7 +383,7 @@ static int print_events_table_entry(void *data, struct json_event *je)
fprintf(outfp, "\t.desc = \"%s\",\n", je->desc);
if (je->compat)
fprintf(outfp, "\t.compat = \"%s\",\n", je->compat);
- fprintf(outfp, "\t.topic = \"%s\",\n", topic);
+ fprintf(outfp, "\t.topic = \"%s\",\n", topic_local);
if (je->long_desc && je->long_desc[0])
fprintf(outfp, "\t.long_desc = \"%s\",\n", je->long_desc);
if (je->pmu)
@@ -1208,7 +1206,7 @@ int main(int argc, char *argv[])
const char *arch;
const char *output_file;
const char *start_dirname;
- char *err_string_ext = "";
+ const char *err_string_ext = "";
struct stat stbuf;

prog = basename(argv[0]);
--
2.17.1