linux-kernel - [tip:perf/urgent] Revert "perf pmu: Fix pmu events parsing rule"

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Message-ID: <tip-ye1o2mji7x68xotiot1tn1gp@git.kernel.org>
Date:   Thu, 10 May 2018 11:15:40 -0700
From:   tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     ak@...ux.intel.com, wangnan0@...wei.com, jolsa@...nel.org,
        adrian.hunter@...el.com, mingo@...nel.org, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, peterz@...radead.org, hpa@...or.com,
        alexander.shishkin@...ux.intel.com, dsahern@...il.com,
        namhyung@...nel.org, acme@...hat.com, kan.liang@...ux.intel.com
Subject: [tip:perf/urgent] Revert "perf pmu: Fix pmu events parsing rule"

Commit-ID:  4a35a9027f64d588d2fd9436dda4126e8d5647d7
Gitweb:     https://git.kernel.org/tip/4a35a9027f64d588d2fd9436dda4126e8d5647d7
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Mon, 7 May 2018 15:27:01 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 7 May 2018 16:28:10 -0300

Revert "perf pmu: Fix pmu events parsing rule"

As reported by Adrian Hunter, this breaks intel_pt event parsing:

  # perf record -e intel_pt//u uname
  event syntax error: 'intel_pt//u'
                               \___ parser error
  Run 'perf list' for a list of valid events

   Usage: perf record [<options>] [<command>]
      or: perf record [<options>] -- <command> [<options>]

      -e, --event <event>   event selector. use 'perf list' to list available events
  #

This reverts commit 9a4a931ce847f4aaa12edf11b2e050e18bf45910.

Reported-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Kan Liang <kan.liang@...ux.intel.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: https://lkml.kernel.org/n/tip-ye1o2mji7x68xotiot1tn1gp@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/parse-events.y | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index d14464c42714..7afeb80cc39e 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -224,15 +224,15 @@ event_def: event_pmu |
 	   event_bpf_file
 
 event_pmu:
-PE_NAME '/' event_config '/'
+PE_NAME opt_event_config
 {
 	struct list_head *list, *orig_terms, *terms;
 
-	if (parse_events_copy_term_list($3, &orig_terms))
+	if (parse_events_copy_term_list($2, &orig_terms))
 		YYABORT;
 
 	ALLOC_LIST(list);
-	if (parse_events_add_pmu(_parse_state, list, $1, $3, false)) {
+	if (parse_events_add_pmu(_parse_state, list, $1, $2, false)) {
 		struct perf_pmu *pmu = NULL;
 		int ok = 0;
 		char *pattern;
@@ -262,7 +262,7 @@ PE_NAME '/' event_config '/'
 		if (!ok)
 			YYABORT;
 	}
-	parse_events_terms__delete($3);
+	parse_events_terms__delete($2);
 	parse_events_terms__delete(orig_terms);
 	$$ = list;
 }