perf evsel: Remove idx parm from constructor

Most uses of the evsel constructor are followed by a call to
perf_evlist__add with an idex of evlist->nr_entries, so make rename
the current constructor to perf_evsel__new_idx and remove the need
for passing the constructor for the common case.

We still need the new_idx variant because the way groups are handled,
with evsel->nr_members holding the number of entries in an evlist,
partitioning the evlist into sublists inside a single linked list.

This asks for a clarifying refactoring, but for now simplify the non
parser cases, so that tool writers don't have to bother with evsel idx
setting.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-zy9tskx6jqm2rmw7468zze2a@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

5 files changed, 25 insertions, 13 deletions

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index b939221efd8d..99dc58e5dcc3 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -117,6 +117,8 @@ void perf_evlist__delete(struct perf_evlist *evlist)
 void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry)
 {
 	list_add_tail(&entry->node, &evlist->entries);
+	entry->idx = evlist->nr_entries;
+
 	if (!evlist->nr_entries++)
 		perf_evlist__set_id_pos(evlist);
 }
@@ -165,7 +167,7 @@ int perf_evlist__add_default(struct perf_evlist *evlist)
 
 	event_attr_init(&attr);
 
-	evsel = perf_evsel__new(&attr, 0);
+	evsel = perf_evsel__new(&attr);
 	if (evsel == NULL)
 		goto error;
 
@@ -190,7 +192,7 @@ static int perf_evlist__add_attrs(struct perf_evlist *evlist,
 	size_t i;
 
 	for (i = 0; i < nr_attrs; i++) {
-		evsel = perf_evsel__new(attrs + i, evlist->nr_entries + i);
+		evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i);
 		if (evsel == NULL)
 			goto out_delete_partial_list;
 		list_add_tail(&evsel->node, &head);
@@ -249,9 +251,8 @@ perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist,
 int perf_evlist__add_newtp(struct perf_evlist *evlist,
 			   const char *sys, const char *name, void *handler)
 {
-	struct perf_evsel *evsel;
+	struct perf_evsel *evsel = perf_evsel__newtp(sys, name);
 
-	evsel = perf_evsel__newtp(sys, name, evlist->nr_entries);
 	if (evsel == NULL)
 		return -1;
 
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 5280820ed389..f95653a639a6 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -168,7 +168,7 @@ void perf_evsel__init(struct perf_evsel *evsel,
 	perf_evsel__calc_id_pos(evsel);
 }
 
-struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
+struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
 {
 	struct perf_evsel *evsel = zalloc(sizeof(*evsel));
 
@@ -219,7 +219,7 @@ out:
 	return format;
 }
 
-struct perf_evsel *perf_evsel__newtp(const char *sys, const char *name, int idx)
+struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
 {
 	struct perf_evsel *evsel = zalloc(sizeof(*evsel));
 
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 64ec8e1a7a28..0178233abd64 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -96,8 +96,19 @@ struct thread_map;
 struct perf_evlist;
 struct perf_record_opts;
 
-struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
-struct perf_evsel *perf_evsel__newtp(const char *sys, const char *name, int idx);
+struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx);
+
+static inline struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr)
+{
+	return perf_evsel__new_idx(attr, 0);
+}
+
+struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx);
+
+static inline struct perf_evsel *perf_evsel__newtp(const char *sys, const char *name)
+{
+	return perf_evsel__newtp_idx(sys, name, 0);
+}
 
 struct event_format *event_format__new(const char *sys, const char *name);
 
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 26d9520a0c1b..369c03648f88 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2797,7 +2797,7 @@ int perf_session__read_header(struct perf_session *session)
 			perf_event__attr_swap(&f_attr.attr);
 
 		tmp = lseek(fd, 0, SEEK_CUR);
-		evsel = perf_evsel__new(&f_attr.attr, i);
+		evsel = perf_evsel__new(&f_attr.attr);
 
 		if (evsel == NULL)
 			goto out_delete_evlist;
@@ -2916,7 +2916,7 @@ int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
 			return -ENOMEM;
 	}
 
-	evsel = perf_evsel__new(&event->attr.attr, evlist->nr_entries);
+	evsel = perf_evsel__new(&event->attr.attr);
 	if (evsel == NULL)
 		return -ENOMEM;
 
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index c90e55cf7e82..6de6f89c2a61 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -277,7 +277,7 @@ static int __add_event(struct list_head *list, int *idx,
 
 	event_attr_init(attr);
 
-	evsel = perf_evsel__new(attr, (*idx)++);
+	evsel = perf_evsel__new_idx(attr, (*idx)++);
 	if (!evsel)
 		return -ENOMEM;
 
@@ -378,7 +378,7 @@ static int add_tracepoint(struct list_head *list, int *idx,
 {
 	struct perf_evsel *evsel;
 
-	evsel = perf_evsel__newtp(sys_name, evt_name, (*idx)++);
+	evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 	if (!evsel)
 		return -ENOMEM;
 
@@ -1097,7 +1097,7 @@ static bool is_event_supported(u8 type, unsigned config)
 		.threads = { 0 },
 	};
 
-	evsel = perf_evsel__new(&attr, 0);
+	evsel = perf_evsel__new(&attr);
 	if (evsel) {
 		ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
 		perf_evsel__delete(evsel);