From patchwork Thu Apr 18 13:53:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 13634781 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 43D9316133C; Thu, 18 Apr 2024 13:55:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713448550; cv=none; b=eL20220vpHrDa9wuowXhc3g1Y0Nvh7WDPAUpNudL9yz0AVEgouXAI8gpyUT/WDMAPAGKmVYylmSa6z8Lytv20vvPUrHTNDgnKd37uAyxSJQrXkXXXPgum04xxQirnsiuOqt6GiMkufc22VHcuqvllomLwb11HFKavp/1YjYrsTQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713448550; c=relaxed/simple; bh=gyNFptB6Y3Qour6RrRLA3wJw/nrlgnS1Xva7X2273JM=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=r2TmiMQHA+Idv5pBCjxOWQBBLdwHv3ANFBKtCtePKL+3ND099t4tunL5RHWXZCFGSectsr8EgwKcnvJOxH51Y2lphrZU8ETKKGZBGWeEfzHB+QSfcviVPKl/LS0yhYWAqsOTvM3dmcgT5VgnTAQpfT8BZZ0MmgYEkeitbu0DMu0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.31]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4VKzlB5l9Lz6K5xW; Thu, 18 Apr 2024 21:53:42 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (unknown [7.191.163.240]) by mail.maildlp.com (Postfix) with ESMTPS id 294431400CD; Thu, 18 Apr 2024 21:55:46 +0800 (CST) Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Thu, 18 Apr 2024 14:55:45 +0100 From: Jonathan Cameron To: Thomas Gleixner , Peter Zijlstra , , , , , , , , , Russell King , "Rafael J . Wysocki" , Miguel Luis , James Morse , Salil Mehta , Jean-Philippe Brucker , Catalin Marinas , Will Deacon CC: Ingo Molnar , Borislav Petkov , Dave Hansen , , , Subject: [PATCH v7 03/16] ACPI: processor: Drop duplicated check on _STA (enabled + present) Date: Thu, 18 Apr 2024 14:53:59 +0100 Message-ID: <20240418135412.14730-4-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240418135412.14730-1-Jonathan.Cameron@huawei.com> References: <20240418135412.14730-1-Jonathan.Cameron@huawei.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: lhrpeml100002.china.huawei.com (7.191.160.241) To lhrpeml500005.china.huawei.com (7.191.163.240) The ACPI bus scan will only result in acpi_processor_add() being called if _STA has already been checked and the result is that the processor is enabled and present. Hence drop this additional check. Suggested-by: Rafael J. Wysocki Signed-off-by: Jonathan Cameron Acked-by: Rafael J. Wysocki Reviewed-by: Hanjun Guo Reviewed-by: Gavin Shan --- v7: No change v6: New patch to drop this unnecessary code. Now I think we only need to explicitly read STA to print a warning in the ARM64 arch_unregister_cpu() path where we want to know if the present bit has been unset as well. --- drivers/acpi/acpi_processor.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index 7fc924aeeed0..ba0a6f0ac841 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -186,17 +186,11 @@ static void __init acpi_pcc_cpufreq_init(void) {} #ifdef CONFIG_ACPI_HOTPLUG_CPU static int acpi_processor_hotadd_init(struct acpi_processor *pr) { - unsigned long long sta; - acpi_status status; int ret; if (invalid_phys_cpuid(pr->phys_id)) return -ENODEV; - status = acpi_evaluate_integer(pr->handle, "_STA", NULL, &sta); - if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT)) - return -ENODEV; - cpu_maps_update_begin(); cpus_write_lock();