[tip:perf/core] perf top: Create the evlist sooner

[tip-bot for Namhyung Kim <tipbot@zytor.com>]

Commit-ID:  54f8f40384ab940e15585afde5c278c8e7726214
Gitweb:     http://git.kernel.org/tip/54f8f40384ab940e15585afde5c278c8e7726214
Author:     Namhyung Kim <namhyung@kernel.org>
AuthorDate: Wed, 23 Dec 2015 02:07:01 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 6 Jan 2016 20:11:11 -0300

perf top: Create the evlist sooner

This is a preparation to support dynamic sort keys for tracepoint
events.  Dynamic sort keys can be created for specific fields in trace
events so it needs the event information, so we need to pass the evlist
to the sort routines, create it sooner so that the next patch can do
that.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1450804030-29193-5-git-send-email-namhyung@kernel.org
[ Split from the patch passing the evlist to the sort routines ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-top.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 9ebd67a..4e913d8 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1231,6 +1231,12 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
 	if (argc)
 		usage_with_options(top_usage, options);
 
+	if (!top.evlist->nr_entries &&
+	    perf_evlist__add_default(top.evlist) < 0) {
+		pr_err("Not enough memory for event selector list\n");
+		goto out_delete_evlist;
+	}
+
 	sort__mode = SORT_MODE__TOP;
 	/* display thread wants entries to be collapsed in a different tree */
 	sort__need_collapse = 1;
@@ -1277,12 +1283,6 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
 		goto out_delete_evlist;
 	}
 
-	if (!top.evlist->nr_entries &&
-	    perf_evlist__add_default(top.evlist) < 0) {
-		ui__error("Not enough memory for event selector list\n");
-		goto out_delete_evlist;
-	}
-
 	symbol_conf.nr_events = top.evlist->nr_entries;
 
 	if (top.delay_secs < 1)