perf db-export: Get rid of db_export__deferred()

db_export__deferred() deferred the export of comms if the comm string
had not been "set" (changed from :<pid>) however that problem was fixed
a long time ago by commit e803cf97a4f9 ("perf record: Synthesize COMM
event for a command line workload"), so get rid of
db_export__deferred().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20190710085810.1650-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

3 files changed, 2 insertions, 65 deletions

diff --git a/tools/perf/util/db-export.c b/tools/perf/util/db-export.c
index 2394c7506abe..34cf197fe74f 100644
--- a/tools/perf/util/db-export.c
+++ b/tools/perf/util/db-export.c
@@ -20,70 +20,14 @@
 #include "db-export.h"
 #include <linux/zalloc.h>
 
-struct deferred_export {
-        struct list_head node;
-        struct comm *comm;
-};
-
-static int db_export__deferred(struct db_export *dbe)
-{
-        struct deferred_export *de;
-        int err;
-
-        while (!list_empty(&dbe->deferred)) {
-                de = list_entry(dbe->deferred.next, struct deferred_export,
-                                node);
-                err = dbe->export_comm(dbe, de->comm);
-                list_del_init(&de->node);
-                free(de);
-                if (err)
-                        return err;
-        }
-
-        return 0;
-}
-
-static void db_export__free_deferred(struct db_export *dbe)
-{
-        struct deferred_export *de;
-
-        while (!list_empty(&dbe->deferred)) {
-                de = list_entry(dbe->deferred.next, struct deferred_export,
-                                node);
-                list_del_init(&de->node);
-                free(de);
-        }
-}
-
-static int db_export__defer_comm(struct db_export *dbe, struct comm *comm)
-{
-        struct deferred_export *de;
-
-        de = zalloc(sizeof(struct deferred_export));
-        if (!de)
-                return -ENOMEM;
-
-        de->comm = comm;
-        list_add_tail(&de->node, &dbe->deferred);
-
-        return 0;
-}
-
 int db_export__init(struct db_export *dbe)
 {
         memset(dbe, 0, sizeof(struct db_export));
-        INIT_LIST_HEAD(&dbe->deferred);
         return 0;
 }
 
-int db_export__flush(struct db_export *dbe)
-{
-        return db_export__deferred(dbe);
-}
-
 void db_export__exit(struct db_export *dbe)
 {
-        db_export__free_deferred(dbe);
         call_return_processor__free(dbe->crp);
         dbe->crp = NULL;
 }
@@ -172,10 +116,7 @@ int db_export__comm(struct db_export *dbe, struct comm *comm,
         comm->db_id = ++dbe->comm_last_db_id;
 
         if (dbe->export_comm) {
-                if (main_thread->comm_set)
-                        err = dbe->export_comm(dbe, comm);
-                else
-                        err = db_export__defer_comm(dbe, comm);
+                err = dbe->export_comm(dbe, comm);
                 if (err)
                         return err;
         }
diff --git a/tools/perf/util/db-export.h b/tools/perf/util/db-export.h
index e8a64028a386..261cfece8dee 100644
--- a/tools/perf/util/db-export.h
+++ b/tools/perf/util/db-export.h
@@ -68,11 +68,9 @@ struct db_export {
         u64 sample_last_db_id;
         u64 call_path_last_db_id;
         u64 call_return_last_db_id;
-        struct list_head deferred;
 };
 
 int db_export__init(struct db_export *dbe);
-int db_export__flush(struct db_export *dbe);
 void db_export__exit(struct db_export *dbe);
 int db_export__evsel(struct db_export *dbe, struct perf_evsel *evsel);
 int db_export__machine(struct db_export *dbe, struct machine *machine);
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 112bed65232f..c9837f0f0fd6 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -1620,9 +1620,7 @@ error:
 
 static int python_flush_script(void)
 {
-        struct tables *tables = &tables_global;
-
-        return db_export__flush(&tables->dbe);
+        return 0;
 }
 
 /*