libperf: Add perf_cpu_map__dummy_new() function

Move cpu_map__dummy_new() to libperf as perf_cpu_map__dummy_new() function.

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/20190721112506.12306-30-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/lib/cpumap.c

@@ -3,3 +3,16 @@
 #include <stdlib.h>
 #include <linux/refcount.h>
 #include <internal/cpumap.h>
+
+struct perf_cpu_map *perf_cpu_map__dummy_new(void)
+{
+	struct perf_cpu_map *cpus = malloc(sizeof(*cpus) + sizeof(int));
+
+	if (cpus != NULL) {
+		cpus->nr = 1;
+		cpus->map[0] = -1;
+		refcount_set(&cpus->refcnt, 1);
+	}
+
+	return cpus;
+}

tools/perf/lib/include/perf/cpumap.h

@@ -2,6 +2,10 @@
 #ifndef __LIBPERF_CPUMAP_H
 #define __LIBPERF_CPUMAP_H
 
+#include <perf/core.h>
+
 struct perf_cpu_map;
 
+LIBPERF_API struct perf_cpu_map *perf_cpu_map__dummy_new(void);
+
 #endif /* __LIBPERF_CPUMAP_H */

tools/perf/lib/libperf.map

@@ -1,6 +1,7 @@
 LIBPERF_0.0.1 {
 	global:
 		libperf_set_print;
+		perf_cpu_map__dummy_new;
 	local:
 		*;
 };