[tip:perf/core] perf hists browser: Simplify zooming code using pstack_peek()

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Commit-ID:  6422184b087ff4355951d72e0bb320f52e107185
Gitweb:     http://git.kernel.org/tip/6422184b087ff4355951d72e0bb320f52e107185
Author:     Namhyung Kim <namhyung@xxxxxxxxxx>
AuthorDate: Fri, 24 Apr 2015 10:15:33 +0900
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 5 May 2015 18:13:23 -0300

perf hists browser: Simplify zooming code using pstack_peek()

Now LEFT key press action can just use do_zoom_dso/thread() code to get
out of the current filter.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1429838133-14001-2-git-send-email-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/ui/browsers/hists.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 9bd7b38..8733d57 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1860,19 +1860,17 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
 					goto out_free_stack;
 				continue;
 			}
-			top = pstack__pop(browser->pstack);
+			top = pstack__peek(browser->pstack);
 			if (top == &browser->hists->dso_filter) {
-				perf_hpp__set_elide(HISTC_DSO, false);
-				browser->hists->dso_filter = NULL;
-				hists__filter_by_dso(browser->hists);
-			}
-			if (top == &browser->hists->thread_filter) {
-				perf_hpp__set_elide(HISTC_THREAD, false);
-				thread__zput(browser->hists->thread_filter);
-				hists__filter_by_thread(browser->hists);
+				/*
+				 * No need to set actions->dso here since
+				 * it's just to remove the current filter.
+				 * Ditto for thread below.
+				 */
+				do_zoom_dso(browser, actions);
 			}
-			ui_helpline__pop();
-			hist_browser__reset(browser);
+			if (top == &browser->hists->thread_filter)
+				do_zoom_thread(browser, actions);
 			continue;
 		}
 		case K_ESC:
--
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