perf target: Consolidate target task/cpu checking

There are places that check whether target task/cpu is given or not and
some of them didn't check newly introduced uid or cpu list. Add and use
three of helper functions to treat them properly.

Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1336367344-28071-7-git-send-email-namhyung.kim@lge.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 183b199..1201daf 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -609,12 +609,10 @@
 	if (evlist->threads == NULL)
 		return -1;
 
-	if (target->uid != UINT_MAX || target->tid)
-		evlist->cpus = cpu_map__dummy_new();
-	else if (!target->system_wide && target->cpu_list == NULL)
-		evlist->cpus = cpu_map__dummy_new();
-	else
+	if (!perf_target__no_cpu(target))
 		evlist->cpus = cpu_map__new(target->cpu_list);
+	else
+		evlist->cpus = cpu_map__dummy_new();
 
 	if (evlist->cpus == NULL)
 		goto out_delete_threads;
@@ -831,7 +829,7 @@
 		exit(-1);
 	}
 
-	if (!opts->target.system_wide && !opts->target.tid && !opts->target.pid)
+	if (perf_target__none(&opts->target))
 		evlist->threads->map[0] = evlist->workload.pid;
 
 	close(child_ready_pipe[1]);