1 files changed, 14 insertions, 32 deletions

diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index 93c67bf53d2c..5d5dc6b09617 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -92,23 +92,18 @@ static void setup_cpunode_map(void)
         if (!dir1)
                 return;
 
-        while (true) {
-                dent1 = readdir(dir1);
-                if (!dent1)
-                        break;
-
-                if (sscanf(dent1->d_name, "node%u", &mem) < 1)
+        while ((dent1 = readdir(dir1)) != NULL) {
+                if (dent1->d_type != DT_DIR ||
+                    sscanf(dent1->d_name, "node%u", &mem) < 1)
                         continue;
 
                 snprintf(buf, PATH_MAX, "%s/%s", PATH_SYS_NODE, dent1->d_name);
                 dir2 = opendir(buf);
                 if (!dir2)
                         continue;
-                while (true) {
-                        dent2 = readdir(dir2);
-                        if (!dent2)
-                                break;
-                        if (sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
+                while ((dent2 = readdir(dir2)) != NULL) {
+                        if (dent2->d_type != DT_LNK ||
+                            sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
                                 continue;
                         cpunode_map[cpu] = mem;
                 }
@@ -321,11 +316,8 @@ static int process_sample_event(event_t *event, struct perf_session *session)
 
         event__parse_sample(event, session->sample_type, &data);
 
-        dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
-                event->header.misc,
-                data.pid, data.tid,
-                (void *)(long)data.ip,
-                (long long)data.period);
+        dump_printf("(IP, %d): %d/%d: %#Lx period: %Ld\n", event->header.misc,
+                    data.pid, data.tid, data.ip, data.period);
 
         thread = perf_session__findnew(session, event->ip.pid);
         if (thread == NULL) {
@@ -342,22 +334,9 @@ static int process_sample_event(event_t *event, struct perf_session *session)
         return 0;
 }
 
-static int sample_type_check(struct perf_session *session)
-{
-        if (!(session->sample_type & PERF_SAMPLE_RAW)) {
-                fprintf(stderr,
-                        "No trace sample to read. Did you call perf record "
-                        "without -R?");
-                return -1;
-        }
-
-        return 0;
-}
-
 static struct perf_event_ops event_ops = {
-        .process_sample_event   = process_sample_event,
-        .process_comm_event     = event__process_comm,
-        .sample_type_check      = sample_type_check,
+        .sample = process_sample_event,
+        .comm   = event__process_comm,
 };
 
 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
@@ -504,11 +483,14 @@ static void sort_result(void)
 
 static int __cmd_kmem(void)
 {
-        int err;
+        int err = -EINVAL;
         struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0);
         if (session == NULL)
                 return -ENOMEM;
 
+        if (!perf_session__has_traces(session, "kmem record"))
+                goto out_delete;
+
         setup_pager();
         err = perf_session__process_events(session, &event_ops);
         if (err != 0)