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>

tools/perf/arch/arm/util/cs-etm.c

@@ -396,7 +396,7 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
 	 * AUX event.  We also need the contextID in order to be notified
 	 * when a context switch happened.
 	 */
-	if (!cpu_map__empty(cpus)) {
+	if (!perf_cpu_map__empty(cpus)) {
 		perf_evsel__set_sample_bit(cs_etm_evsel, CPU);
 
 		err = cs_etm_set_option(itr, cs_etm_evsel,
@@ -420,7 +420,7 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
 		tracking_evsel->core.attr.sample_period = 1;
 
 		/* In per-cpu case, always need the time of mmap events etc */
-		if (!cpu_map__empty(cpus))
+		if (!perf_cpu_map__empty(cpus))
 			perf_evsel__set_sample_bit(tracking_evsel, TIME);
 	}
 
@@ -493,7 +493,7 @@ cs_etm_info_priv_size(struct auxtrace_record *itr __maybe_unused,
 	struct perf_cpu_map *online_cpus = perf_cpu_map__new(NULL);
 
 	/* cpu map is not empty, we have specific CPUs to work with */
-	if (!cpu_map__empty(event_cpus)) {
+	if (!perf_cpu_map__empty(event_cpus)) {
 		for (i = 0; i < cpu__max_cpu(); i++) {
 			if (!cpu_map__has(event_cpus, i) ||
 			    !cpu_map__has(online_cpus, i))
@@ -649,7 +649,7 @@ static int cs_etm_info_fill(struct auxtrace_record *itr,
 		return -EINVAL;
 
 	/* If the cpu_map is empty all online CPUs are involved */
-	if (cpu_map__empty(event_cpus)) {
+	if (perf_cpu_map__empty(event_cpus)) {
 		cpu_map = online_cpus;
 	} else {
 		/* Make sure all specified CPUs are online */

tools/perf/arch/x86/util/intel-bts.c

@@ -133,7 +133,7 @@ static int intel_bts_recording_options(struct auxtrace_record *itr,
 	if (!opts->full_auxtrace)
 		return 0;
 
-	if (opts->full_auxtrace && !cpu_map__empty(cpus)) {
+	if (opts->full_auxtrace && !perf_cpu_map__empty(cpus)) {
 		pr_err(INTEL_BTS_PMU_NAME " does not support per-cpu recording\n");
 		return -EINVAL;
 	}
@@ -214,7 +214,7 @@ static int intel_bts_recording_options(struct auxtrace_record *itr,
 		 * In the case of per-cpu mmaps, we need the CPU on the
 		 * AUX event.
 		 */
-		if (!cpu_map__empty(cpus))
+		if (!perf_cpu_map__empty(cpus))
 			perf_evsel__set_sample_bit(intel_bts_evsel, CPU);
 	}
 

tools/perf/arch/x86/util/intel-pt.c

@@ -365,7 +365,7 @@ static int intel_pt_info_fill(struct auxtrace_record *itr,
 			ui__warning("Intel Processor Trace: TSC not available\n");
 	}
 
-	per_cpu_mmaps = !cpu_map__empty(session->evlist->core.cpus);
+	per_cpu_mmaps = !perf_cpu_map__empty(session->evlist->core.cpus);
 
 	auxtrace_info->type = PERF_AUXTRACE_INTEL_PT;
 	auxtrace_info->priv[INTEL_PT_PMU_TYPE] = intel_pt_pmu->type;
@@ -702,7 +702,7 @@ static int intel_pt_recording_options(struct auxtrace_record *itr,
 	 * Per-cpu recording needs sched_switch events to distinguish different
 	 * threads.
 	 */
-	if (have_timing_info && !cpu_map__empty(cpus)) {
+	if (have_timing_info && !perf_cpu_map__empty(cpus)) {
 		if (perf_can_record_switch_events()) {
 			bool cpu_wide = !target__none(&opts->target) &&
 					!target__has_task(&opts->target);
@@ -760,7 +760,7 @@ static int intel_pt_recording_options(struct auxtrace_record *itr,
 		 * In the case of per-cpu mmaps, we need the CPU on the
 		 * AUX event.
 		 */
-		if (!cpu_map__empty(cpus))
+		if (!perf_cpu_map__empty(cpus))
 			perf_evsel__set_sample_bit(intel_pt_evsel, CPU);
 	}
 
@@ -784,7 +784,7 @@ static int intel_pt_recording_options(struct auxtrace_record *itr,
 			tracking_evsel->immediate = true;
 
 		/* In per-cpu case, always need the time of mmap events etc */
-		if (!cpu_map__empty(cpus)) {
+		if (!perf_cpu_map__empty(cpus)) {
 			perf_evsel__set_sample_bit(tracking_evsel, TIME);
 			/* And the CPU for switch events */
 			perf_evsel__set_sample_bit(tracking_evsel, CPU);
@@ -796,7 +796,7 @@ static int intel_pt_recording_options(struct auxtrace_record *itr,
 	 * Warn the user when we do not have enough information to decode i.e.
 	 * per-cpu with no sched_switch (except workload-only).
 	 */
-	if (!ptr->have_sched_switch && !cpu_map__empty(cpus) &&
+	if (!ptr->have_sched_switch && !perf_cpu_map__empty(cpus) &&
 	    !target__none(&opts->target))
 		ui__warning("Intel Processor Trace decoding will not be possible except for kernel tracing!\n");
 

tools/perf/builtin-c2c.c

@@ -2059,7 +2059,7 @@ static int setup_nodes(struct perf_session *session)
 		nodes[node] = set;
 
 		/* empty node, skip */
-		if (cpu_map__empty(map))
+		if (perf_cpu_map__empty(map))
 			continue;
 
 		for (cpu = 0; cpu < map->nr; cpu++) {

tools/perf/builtin-stat.c

@@ -928,7 +928,7 @@ static int perf_stat_init_aggr_mode(void)
 	 * the aggregation translate cpumap.
 	 */
 	nr = cpu_map__get_max(evsel_list->core.cpus);
-	stat_config.cpus_aggr_map = cpu_map__empty_new(nr + 1);
+	stat_config.cpus_aggr_map = perf_cpu_map__empty_new(nr + 1);
 	return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
 }
 
@@ -1493,7 +1493,7 @@ int process_stat_config_event(struct perf_session *session,
 
 	perf_event__read_stat_config(&stat_config, &event->stat_config);
 
-	if (cpu_map__empty(st->cpus)) {
+	if (perf_cpu_map__empty(st->cpus)) {
 		if (st->aggr_mode != AGGR_UNSET)
 			pr_warning("warning: processing task data, aggregation mode not set\n");
 		return 0;

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;
+}

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

@@ -4,6 +4,7 @@
 
 #include <perf/core.h>
 #include <stdio.h>
+#include <stdbool.h>
 
 struct perf_cpu_map;
 
@@ -14,6 +15,7 @@ LIBPERF_API struct perf_cpu_map *perf_cpu_map__get(struct perf_cpu_map *map);
 LIBPERF_API void perf_cpu_map__put(struct perf_cpu_map *map);
 LIBPERF_API int perf_cpu_map__cpu(const struct perf_cpu_map *cpus, int idx);
 LIBPERF_API int perf_cpu_map__nr(const struct perf_cpu_map *cpus);
+LIBPERF_API bool perf_cpu_map__empty(const struct perf_cpu_map *map);
 
 #define perf_cpu_map__for_each_cpu(cpu, idx, cpus)		\
 	for ((idx) = 0, (cpu) = perf_cpu_map__cpu(cpus, idx);	\

tools/perf/lib/libperf.map

@@ -8,6 +8,7 @@ LIBPERF_0.0.1 {
 		perf_cpu_map__read;
 		perf_cpu_map__nr;
 		perf_cpu_map__cpu;
+		perf_cpu_map__empty;
 		perf_thread_map__new_dummy;
 		perf_thread_map__set_pid;
 		perf_thread_map__comm;

tools/perf/util/cpumap.c

@@ -21,7 +21,7 @@ static struct perf_cpu_map *cpu_map__from_entries(struct cpu_map_entries *cpus)
 {
 	struct perf_cpu_map *map;
 
-	map = cpu_map__empty_new(cpus->nr);
+	map = perf_cpu_map__empty_new(cpus->nr);
 	if (map) {
 		unsigned i;
 
@@ -48,7 +48,7 @@ static struct perf_cpu_map *cpu_map__from_mask(struct cpu_map_mask *mask)
 
 	nr = bitmap_weight(mask->mask, nbits);
 
-	map = cpu_map__empty_new(nr);
+	map = perf_cpu_map__empty_new(nr);
 	if (map) {
 		int cpu, i = 0;
 
@@ -77,7 +77,7 @@ size_t cpu_map__fprintf(struct perf_cpu_map *map, FILE *fp)
 #undef BUFSIZE
 }
 
-struct perf_cpu_map *cpu_map__empty_new(int nr)
+struct perf_cpu_map *perf_cpu_map__empty_new(int nr)
 {
 	struct perf_cpu_map *cpus = malloc(sizeof(*cpus) + sizeof(int) * nr);
 

tools/perf/util/cpumap.h

@@ -11,7 +11,7 @@
 #include "perf.h"
 #include "util/debug.h"
 
-struct perf_cpu_map *cpu_map__empty_new(int nr);
+struct perf_cpu_map *perf_cpu_map__empty_new(int nr);
 struct perf_cpu_map *cpu_map__new_data(struct cpu_map_data *data);
 size_t cpu_map__snprint(struct perf_cpu_map *map, char *buf, size_t size);
 size_t cpu_map__snprint_mask(struct perf_cpu_map *map, char *buf, size_t size);
@@ -49,11 +49,6 @@ static inline int cpu_map__id_to_cpu(int id)
 	return id & 0xffff;
 }
 
-static inline bool cpu_map__empty(const struct perf_cpu_map *map)
-{
-	return map ? map->map[0] == -1 : true;
-}
-
 int cpu__setup_cpunode_map(void);
 
 int cpu__max_node(void);

tools/perf/util/event.c

@@ -1055,7 +1055,7 @@ static size_t mask_size(struct perf_cpu_map *map, int *max)
 void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
 {
 	size_t size_cpus, size_mask;
-	bool is_dummy = cpu_map__empty(map);
+	bool is_dummy = perf_cpu_map__empty(map);
 
 	/*
 	 * Both array and mask data have variable size based

tools/perf/util/evlist.c

@@ -386,7 +386,7 @@ static int perf_evlist__enable_event_thread(struct evlist *evlist,
 int perf_evlist__enable_event_idx(struct evlist *evlist,
 				  struct evsel *evsel, int idx)
 {
-	bool per_cpu_mmaps = !cpu_map__empty(evlist->core.cpus);
+	bool per_cpu_mmaps = !perf_cpu_map__empty(evlist->core.cpus);
 
 	if (per_cpu_mmaps)
 		return perf_evlist__enable_event_cpu(evlist, evsel, idx);
@@ -693,7 +693,7 @@ static struct perf_mmap *perf_evlist__alloc_mmap(struct evlist *evlist,
 	struct perf_mmap *map;
 
 	evlist->nr_mmaps = perf_cpu_map__nr(evlist->core.cpus);
-	if (cpu_map__empty(evlist->core.cpus))
+	if (perf_cpu_map__empty(evlist->core.cpus))
 		evlist->nr_mmaps = thread_map__nr(evlist->core.threads);
 	map = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap));
 	if (!map)
@@ -1018,7 +1018,7 @@ int perf_evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
 			return -ENOMEM;
 	}
 
-	if (cpu_map__empty(cpus))
+	if (perf_cpu_map__empty(cpus))
 		return perf_evlist__mmap_per_thread(evlist, &mp);
 
 	return perf_evlist__mmap_per_cpu(evlist, &mp);

tools/perf/util/record.c

@@ -275,7 +275,7 @@ bool perf_evlist__can_select_event(struct evlist *evlist, const char *str)
 
 	evsel = perf_evlist__last(temp_evlist);
 
-	if (!evlist || cpu_map__empty(evlist->core.cpus)) {
+	if (!evlist || perf_cpu_map__empty(evlist->core.cpus)) {
 		struct perf_cpu_map *cpus = perf_cpu_map__new(NULL);
 
 		cpu =  cpus ? cpus->map[0] : 0;

tools/perf/util/stat.c

@@ -223,7 +223,7 @@ static int check_per_pkg(struct evsel *counter,
 	if (!counter->per_pkg)
 		return 0;
 
-	if (cpu_map__empty(cpus))
+	if (perf_cpu_map__empty(cpus))
 		return 0;
 
 	if (!mask) {