From: Andres Freund Date: Wed, 30 Mar 2016 19:02:45 +0000 (+0200) Subject: perf hists: Fix determination of a callchain node's childlessness X-Git-Tag: v4.9.8~2149^2~63^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=909890355507e92bdaf648e73870f6b5df606da8;p=platform%2Fkernel%2Flinux-rpi3.git perf hists: Fix determination of a callchain node's childlessness The 4b3a3212233a ("perf hists browser: Support flat callchains") commit over-aggressively tried to optimize callchain_node__init_have_children(). That lead to --tui mode not allowing to expand call chain elements if a call chain element had only one parent. That's why --inverted callgraphs looked halfway sane, but plain ones didn't. Revert that individual optimization, it wasn't really related to the rest of the commit. Signed-off-by: Andres Freund Acked-by: Namhyung Kim Tested-by: Arnaldo Carvalho de Melo Cc: Peter Zijlstra Fixes: 4b3a3212233a ("perf hists browser: Support flat callchains") Link: http://lkml.kernel.org/r/20160330190245.GB13305@awork2.anarazel.de Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c index 4b98165..2a83414 100644 --- a/tools/perf/ui/browsers/hists.c +++ b/tools/perf/ui/browsers/hists.c @@ -337,7 +337,7 @@ static void callchain_node__init_have_children(struct callchain_node *node, chain = list_entry(node->val.next, struct callchain_list, list); chain->has_children = has_sibling; - if (node->val.next != node->val.prev) { + if (!list_empty(&node->val)) { chain = list_entry(node->val.prev, struct callchain_list, list); chain->has_children = !RB_EMPTY_ROOT(&node->rb_root); }