Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) client-ip=2620:137:e000::3:7;
Message-ID: <5e2e56cf-9177-cb83-f88b-bd6592260a05@arm.com>
Date:   Tue, 12 Dec 2023 15:13:20 +0000
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.15.1
Subject: Re: [PATCH v1 11/14] perf arm64 header: Remove unnecessary CPU map
 get and put
Content-Language: en-US
To:     Ian Rogers <irogers@google.com>
References: <20231129060211.1890454-1-irogers@google.com>
 <20231129060211.1890454-12-irogers@google.com>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Adrian Hunter <adrian.hunter@intel.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        Mike Leach <mike.leach@linaro.org>,
        Leo Yan <leo.yan@linaro.org>,
        John Garry <john.g.garry@oracle.com>,
        Will Deacon <will@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Darren Hart <dvhart@infradead.org>,
        Davidlohr Bueso <dave@stgolabs.net>,
        =?UTF-8?Q?Andr=c3=a9_Almeida?= <andrealmeid@igalia.com>,
        Kan Liang <kan.liang@linux.intel.com>,
        K Prateek Nayak <kprateek.nayak@amd.com>,
        Sean Christopherson <seanjc@google.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Kajol Jain <kjain@linux.ibm.com>,
        Athira Rajeev <atrajeev@linux.vnet.ibm.com>,
        Andrew Jones <ajones@ventanamicro.com>,
        Alexandre Ghiti <alexghiti@rivosinc.com>,
        Atish Patra <atishp@rivosinc.com>,
        "Steinar H. Gunderson" <sesse@google.com>,
        Yang Jihong <yangjihong1@huawei.com>,
        Yang Li <yang.lee@linux.alibaba.com>,
        Changbin Du <changbin.du@huawei.com>,
        Sandipan Das <sandipan.das@amd.com>,
        Ravi Bangoria <ravi.bangoria@amd.com>,
        Paran Lee <p4ranlee@gmail.com>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Huacai Chen <chenhuacai@kernel.org>,
        Yanteng Si <siyanteng@loongson.cn>,
        linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
        coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org,
        bpf@vger.kernel.org
From:   James Clark <james.clark@arm.com>
In-Reply-To: <20231129060211.1890454-12-irogers@google.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk


On 29/11/2023 06:02, Ian Rogers wrote:
> In both cases the CPU map is known owned by either the caller or a
> PMU.
> 
> Signed-off-by: Ian Rogers <irogers@google.com>

Reviewed-by: James Clark <james.clark@arm.com>

> ---
>  tools/perf/arch/arm64/util/header.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/tools/perf/arch/arm64/util/header.c b/tools/perf/arch/arm64/util/header.c
> index 97037499152e..a9de0b5187dd 100644
> --- a/tools/perf/arch/arm64/util/header.c
> +++ b/tools/perf/arch/arm64/util/header.c
> @@ -25,8 +25,6 @@ static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus)
>  	if (!sysfs || sz < MIDR_SIZE)
>  		return EINVAL;
>  
> -	cpus = perf_cpu_map__get(cpus);
> -
>  	for (cpu = 0; cpu < perf_cpu_map__nr(cpus); cpu++) {
>  		char path[PATH_MAX];
>  		FILE *file;
> @@ -51,7 +49,6 @@ static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus)
>  		break;
>  	}
>  
> -	perf_cpu_map__put(cpus);
>  	return ret;
>  }
>