perf session: Use perf_evlist__id_hdr_size more extensively

Removing perf_session->id_hdr_size, as it can be obtained from the
evsel/evlist.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-1nwc2kslu7gsfblu98xbqbll@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

4 files changed, 10 insertions, 10 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index f5a6452931e6..dc2b62565aa1 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -313,7 +313,7 @@ try_again:
                 }
         }
 
-        perf_session__update_sample_type(session);
+        perf_session__set_id_hdr_size(session);
 }
 
 static int process_buildids(struct perf_record *rec)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 35e86c6df713..520e4256fc66 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1032,7 +1032,7 @@ static int __cmd_top(struct perf_top *top)
                                                &top->session->host_machine);
         perf_top__start_counters(top);
         top->session->evlist = top->evlist;
-        perf_session__update_sample_type(top->session);
+        perf_session__set_id_hdr_size(top->session);
 
         /* Wait for a minimal set of events before starting the snapshot */
         poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 348cc11385b7..5b8601df2392 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -101,11 +101,12 @@ out_close:
         return -1;
 }
 
-void perf_session__update_sample_type(struct perf_session *self)
+void perf_session__set_id_hdr_size(struct perf_session *session)
 {
-        self->id_hdr_size = perf_evlist__id_hdr_size(self->evlist);
-        self->host_machine.id_hdr_size = self->id_hdr_size;
-        machines__set_id_hdr_size(&self->machines, self->id_hdr_size);
+        u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
+
+        session->host_machine.id_hdr_size = id_hdr_size;
+        machines__set_id_hdr_size(&session->machines, id_hdr_size);
 }
 
 int perf_session__create_kernel_maps(struct perf_session *self)
@@ -165,7 +166,7 @@ struct perf_session *perf_session__new(const char *filename, int mode,
         if (mode == O_RDONLY) {
                 if (perf_session__open(self, force) < 0)
                         goto out_delete;
-                perf_session__update_sample_type(self);
+                perf_session__set_id_hdr_size(self);
         } else if (mode == O_WRONLY) {
                 /*
                  * In O_RDONLY mode this will be performed when reading the
@@ -1054,7 +1055,7 @@ static int perf_session__process_user_event(struct perf_session *session, union
         case PERF_RECORD_HEADER_ATTR:
                 err = tool->attr(event, &session->evlist);
                 if (err == 0)
-                        perf_session__update_sample_type(session);
+                        perf_session__set_id_hdr_size(session);
                 return err;
         case PERF_RECORD_HEADER_EVENT_TYPE:
                 return tool->event_type(tool, event);
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index a2c3ce9e716d..e2a1a4b7b236 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -44,7 +44,6 @@ struct perf_session {
         int                     fd;
         bool                    fd_pipe;
         bool                    repipe;
-        u16                     id_hdr_size;
         int                     cwdlen;
         char                    *cwd;
         struct ordered_samples  ordered_samples;
@@ -83,7 +82,7 @@ void perf_event__attr_swap(struct perf_event_attr *attr);
 
 int perf_session__create_kernel_maps(struct perf_session *self);
 
-void perf_session__update_sample_type(struct perf_session *self);
+void perf_session__set_id_hdr_size(struct perf_session *session);
 void perf_session__remove_thread(struct perf_session *self, struct thread *th);
 
 static inline