linux-kernel - [RFC PATCH v1 14/37] perf evsel: remove retry_sample

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Message-Id: <340af0d03408d6621fd9c742e311db18b3585b3b.1629490974.git.rickyman7@gmail.com>
Date:   Sat, 21 Aug 2021 11:19:20 +0200
From:   Riccardo Mancini <rickyman7@...il.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org,
        Riccardo Mancini <rickyman7@...il.com>
Subject: [RFC PATCH v1 14/37] perf evsel: remove retry_sample_id goto label

As far as I can tell, there is no good reason, apart from optimization
to have the retry_sample_id separate from fallback_missing_features.
Probably, this label was added to avoid reapplying patches for missing
features that had already been applied.
However, missing features that have been added later have not used this
optimization, always jumping to fallback_missing_features and reapplying
all missing features.

This patch removes that label, replacing it with
fallback_missing_features.

Signed-off-by: Riccardo Mancini <rickyman7@...il.com>
---
 tools/perf/util/evsel.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index f61e5dd53f5d2859..7b4bb3229a16524e 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1825,7 +1825,6 @@ static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
 		evsel->core.attr.bpf_event = 0;
 	if (perf_missing_features.branch_hw_idx)
 		evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX;
-retry_sample_id:
 	if (perf_missing_features.sample_id_all)
 		evsel->core.attr.sample_id_all = 0;
 
@@ -2006,7 +2005,7 @@ static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
 	} else if (!perf_missing_features.sample_id_all) {
 		perf_missing_features.sample_id_all = true;
 		pr_debug2_peo("switching off sample_id_all\n");
-		goto retry_sample_id;
+		goto fallback_missing_features;
 	} else if (!perf_missing_features.lbr_flags &&
 			(evsel->core.attr.branch_sample_type &
 			 (PERF_SAMPLE_BRANCH_NO_CYCLES |
-- 
2.31.1