libperf: Add nr_entries to struct perf_evlist

Move nr_entries count from 'struct perf' to into perf_evlist struct.

Committer notes:

Fix tools/perf/arch/s390/util/auxtrace.c case. And also the comment in
tools/perf/util/annotate.h.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-42-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 4 insertions, 0 deletions

diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 023fe4b44131..1b27fd2de9b9 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -7,16 +7,19 @@
 void perf_evlist__init(struct perf_evlist *evlist)
 {
         INIT_LIST_HEAD(&evlist->entries);
+        evlist->nr_entries = 0;
 }
 
 void perf_evlist__add(struct perf_evlist *evlist,
                       struct perf_evsel *evsel)
 {
         list_add_tail(&evsel->node, &evlist->entries);
+        evlist->nr_entries += 1;
 }
 
 void perf_evlist__remove(struct perf_evlist *evlist,
                          struct perf_evsel *evsel)
 {
         list_del_init(&evsel->node);
+        evlist->nr_entries -= 1;
 }
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 7fbfe5716652..a12c712a9197 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -4,6 +4,7 @@
 
 struct perf_evlist {
         struct list_head        entries;
+        int                     nr_entries;
 };
 
 #endif /* __LIBPERF_INTERNAL_EVLIST_H */