linux-kernel - [PATCH] Revert "perf report: Treat an argument as a symbol filter"

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Date:   Thu, 17 Sep 2020 11:14:14 +0800
From:   Wei Li <liwei391@...wei.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        "Namhyung Kim" <namhyung@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <huawei.libin@...wei.com>,
        <guohanjun@...wei.com>
Subject: [PATCH] Revert "perf report: Treat an argument as a symbol filter"

Since commit 6db6127c4dad ("perf report: Treat an argument as a symbol
filter"), the only one unrecognized argument for perf-report is treated
as a symbol filter. This is not described in man page nor help info,
and the result is really confusing, especially when it's misspecified by
the user (e.g. missing -i for perf.data).

As we can use "--symbol-filter=" if we really want to filter a symbol,
it may be better to revert this misfeature.

Signed-off-by: Wei Li <liwei391@...wei.com>
---
 tools/perf/builtin-report.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 3c74c9c0f3c3..f57ebc1bcd20 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1317,13 +1317,9 @@ int cmd_report(int argc, const char **argv)
 	argc = parse_options(argc, argv, options, report_usage, 0);
 	if (argc) {
 		/*
-		 * Special case: if there's an argument left then assume that
-		 * it's a symbol filter:
+		 * Any (unrecognized) arguments left?
 		 */
-		if (argc > 1)
-			usage_with_options(report_usage, options);
-
-		report.symbol_filter_str = argv[0];
+		usage_with_options(report_usage, options);
 	}
 
 	if (annotate_check_args(&report.annotation_opts) < 0)
-- 
2.17.1