linux-kernel - [PATCH v3 02/22] perf cpumap: Use for each loop

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220211103415.2737789-3-irogers@google.com>
Date:   Fri, 11 Feb 2022 02:33:55 -0800
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Darren Hart <dvhart@...radead.org>,
        Davidlohr Bueso <dave@...olabs.net>,
        "André Almeida" <andrealmeid@...labora.com>,
        James Clark <james.clark@....com>,
        John Garry <john.garry@...wei.com>,
        Riccardo Mancini <rickyman7@...il.com>,
        Yury Norov <yury.norov@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jin Yao <yao.jin@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Leo Yan <leo.yan@...aro.org>, Andi Kleen <ak@...ux.intel.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Madhavan Srinivasan <maddy@...ux.ibm.com>,
        Shunsuke Nakamura <nakamura.shun@...itsu.com>,
        Song Liu <song@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Miaoqian Lin <linmq006@...il.com>,
        Stephen Brennan <stephen.s.brennan@...cle.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Alexey Bayduraev <alexey.v.bayduraev@...ux.intel.com>,
        German Gomez <german.gomez@....com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        Eric Dumazet <edumazet@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>, Hao Luo <haoluo@...gle.com>
Cc:     eranian@...gle.com, Ian Rogers <irogers@...gle.com>
Subject: [PATCH v3 02/22] perf cpumap: Use for each loop

Improve readability in perf_pmu__cpus_match by using
perf_cpu_map__for_each_cpu.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/pmu.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 8dfbba15aeb8..9a1c7e63e663 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1998,7 +1998,8 @@ int perf_pmu__cpus_match(struct perf_pmu *pmu, struct perf_cpu_map *cpus,
 {
 	struct perf_cpu_map *pmu_cpus = pmu->cpus;
 	struct perf_cpu_map *matched_cpus, *unmatched_cpus;
-	int matched_nr = 0, unmatched_nr = 0;
+	struct perf_cpu cpu;
+	int i, matched_nr = 0, unmatched_nr = 0;
 
 	matched_cpus = perf_cpu_map__default_new();
 	if (!matched_cpus)
@@ -2010,14 +2011,11 @@ int perf_pmu__cpus_match(struct perf_pmu *pmu, struct perf_cpu_map *cpus,
 		return -1;
 	}
 
-	for (int i = 0; i < cpus->nr; i++) {
-		int cpu;
-
-		cpu = perf_cpu_map__idx(pmu_cpus, cpus->map[i]);
-		if (cpu == -1)
-			unmatched_cpus->map[unmatched_nr++] = cpus->map[i];
+	perf_cpu_map__for_each_cpu(cpu, i, cpus) {
+		if (!perf_cpu_map__has(pmu_cpus, cpu))
+			unmatched_cpus->map[unmatched_nr++] = cpu;
 		else
-			matched_cpus->map[matched_nr++] = cpus->map[i];
+			matched_cpus->map[matched_nr++] = cpu;
 	}
 
 	unmatched_cpus->nr = unmatched_nr;
-- 
2.35.1.265.g69c8d7142f-goog