perf hists: Remove hist_entry->used, not used anymore

Since hist_entry__delete() nowadays doesn't actually frees anything that
may be in use by the annotation code.

Eventually we will solve this for good by reference counting struct
symbol.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-uldtgljymtrkns0knpiso5op@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

3 files changed, 1 insertions, 13 deletions

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index ebd9d3afe2d6..c37e70ae0b20 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1731,12 +1731,7 @@ do_annotate:
                         if (!notes->src)
                                 continue;
 
-                        /*
-                         * Don't let this be freed, say, by hists__decay_entry.
-                         */
-                        he->used = true;
                         err = hist_entry__tui_annotate(he, evsel, hbt);
-                        he->used = false;
                         /*
                          * offer option to annotate the other branch source or target
                          * (if they exists) when returning from annotate
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index d9a6d35eda17..cc22b9158b93 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -263,15 +263,9 @@ void hists__decay_entries(struct hists *hists, bool zap_user, bool zap_kernel)
         while (next) {
                 n = rb_entry(next, struct hist_entry, rb_node);
                 next = rb_next(&n->rb_node);
-                /*
-                 * We may be annotating this, for instance, so keep it here in
-                 * case some it gets new samples, we'll eventually free it when
-                 * the user stops browsing and it agains gets fully decayed.
-                 */
                 if (((zap_user && n->level == '.') ||
                      (zap_kernel && n->level != '.') ||
-                     hists__decay_entry(hists, n)) &&
-                    !n->used) {
+                     hists__decay_entry(hists, n))) {
                         hists__delete_entry(hists, n);
                 }
         }
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index c03e4ff8beff..9c01b83eebca 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -102,7 +102,6 @@ struct hist_entry {
 
         bool                    init_have_children;
         char                    level;
-        bool                    used;
         u8                      filtered;
         char                    *srcline;
         struct symbol           *parent;