perf mmap: Simplify perf_mmap__read_event()
It isn't necessary to pass the 'overwrite', 'start' and 'end' argument
to perf_mmap__read_event(). Discard them.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1520350567-80082-7-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index e0b1b41..e0eae10 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -36,7 +36,7 @@ static int count_samples(struct perf_evlist *evlist, int *sample_count,
u64 start, end;
perf_mmap__read_init(map, true, &start, &end);
- while ((event = perf_mmap__read_event(map, true, &start, end)) != NULL) {
+ while ((event = perf_mmap__read_event(map)) != NULL) {
const u32 type = event->header.type;
switch (type) {