libperf: Move perf's cpu_map__empty() to perf_cpu_map__empty()

So it's part of the libperf library as one of basic functions operating
on the perf_cpu_map class.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@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/20190822111141.25823-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/tools/perf/lib/cpumap.c b/tools/perf/lib/cpumap.c
index 1ddb69e796e5..63f7df7e47ff 100644
--- a/tools/perf/lib/cpumap.c
+++ b/tools/perf/lib/cpumap.c
@@ -237,3 +237,8 @@ int perf_cpu_map__nr(const struct perf_cpu_map *cpus)
 {
 	return cpus ? cpus->nr : 1;
 }
+
+bool perf_cpu_map__empty(const struct perf_cpu_map *map)
+{
+	return map ? map->map[0] == -1 : true;
+}