From patchwork Tue Jun 11 17:44:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fred Griffoul X-Patchwork-Id: 13694070 Received: from smtp-fw-9102.amazon.com (smtp-fw-9102.amazon.com [207.171.184.29]) (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 92E5A502A9; Tue, 11 Jun 2024 17:45:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=207.171.184.29 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718127935; cv=none; b=VgO4be7ceo+2094YU/oVtDsc0rZVSYMymKnLCrsS/5aqEcZ34eBP5mwt/YjipBeKVAi8daTaX7DyVRCSnELYuN92Pm+Bjfl6g7Wcqf0IecUqWaq8LL0wEbyiwb+fzI0xrwhK068g0FJULiX+V+65vcskrQdfyJst/+fNbDaAK44= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718127935; c=relaxed/simple; bh=zTaBAcIgu8FzEpJSI1r+QourCEvxKKmgr6F8JlwIUR0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=mYVspONKak8GJbEdGS5ALDu2FBZrnqwU+TalHuOoCq0HZUj/dXZGohBW5cfDkeTOthsU8b3VQvdAv0/BPJp4oKjmjYos4DduO0BoXT8/enn/94ACPcISRF2Y7xAob7WG67Nw6UfBN8OrVqYsP37AoAUQDw6GYEFL9nt6Ym7dIZg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.co.uk; spf=pass smtp.mailfrom=amazon.co.uk; dkim=pass (1024-bit key) header.d=amazon.co.uk header.i=@amazon.co.uk header.b=NORoAM53; arc=none smtp.client-ip=207.171.184.29 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.co.uk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.co.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amazon.co.uk header.i=@amazon.co.uk header.b="NORoAM53" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.co.uk; i=@amazon.co.uk; q=dns/txt; s=amazon201209; t=1718127930; x=1749663930; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GKre/lXeLq2FkbVhYcoGJbiGx0tXQ6v9fNnBOIMJeLw=; b=NORoAM53ue9g4Hl1e4uAFcXinqGhm6NEyN8BQdmDfJqu7hv0Ih0IfSEU nPmNAVO/k5qrsMAnBiUM4up3bGJoTCZdJYD23OTFokUbfBWbnh/bejIoZ 7JS1lasJoFWs6KmoksxzF+SSbcDyaARIu3CTnGLcxJf2od3IV/DsBfIpK 8=; X-IronPort-AV: E=Sophos;i="6.08,230,1712620800"; d="scan'208";a="425558126" Received: from pdx4-co-svc-p1-lb2-vlan3.amazon.com (HELO smtpout.prod.us-east-1.prod.farcaster.email.amazon.dev) ([10.25.36.214]) by smtp-border-fw-9102.sea19.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jun 2024 17:45:22 +0000 Received: from EX19MTAEUC001.ant.amazon.com [10.0.10.100:42655] by smtpin.naws.eu-west-1.prod.farcaster.email.amazon.dev [10.0.31.105:2525] with esmtp (Farcaster) id bb066631-9c9a-4482-b062-2f22bedf3b3d; Tue, 11 Jun 2024 17:45:21 +0000 (UTC) X-Farcaster-Flow-ID: bb066631-9c9a-4482-b062-2f22bedf3b3d Received: from EX19D007EUA001.ant.amazon.com (10.252.50.133) by EX19MTAEUC001.ant.amazon.com (10.252.51.155) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.34; Tue, 11 Jun 2024 17:45:21 +0000 Received: from EX19MTAUWA001.ant.amazon.com (10.250.64.204) by EX19D007EUA001.ant.amazon.com (10.252.50.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.34; Tue, 11 Jun 2024 17:45:21 +0000 Received: from dev-dsk-fgriffo-1c-69b51a13.eu-west-1.amazon.com (10.13.244.152) by mail-relay.amazon.com (10.250.64.204) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.34 via Frontend Transport; Tue, 11 Jun 2024 17:45:16 +0000 From: Fred Griffoul To: CC: Fred Griffoul , kernel test robot , Catalin Marinas , Will Deacon , Alex Williamson , Waiman Long , Zefan Li , Tejun Heo , Johannes Weiner , Mark Rutland , Marc Zyngier , Oliver Upton , Mark Brown , Ard Biesheuvel , Joey Gouly , Ryan Roberts , Jeremy Linton , "Jason Gunthorpe" , Yi Liu , Kevin Tian , Eric Auger , Stefan Hajnoczi , Christian Brauner , Ankit Agrawal , Reinette Chatre , Ye Bin , , , , Subject: [PATCH v6 1/2] cgroup/cpuset: export cpuset_cpus_allowed() Date: Tue, 11 Jun 2024 17:44:24 +0000 Message-ID: <20240611174430.90787-2-fgriffo@amazon.co.uk> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240611174430.90787-1-fgriffo@amazon.co.uk> References: <20240611174430.90787-1-fgriffo@amazon.co.uk> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 A subsequent patch calls cpuset_cpus_allowed() in the vfio driver pci code. Export the symbol to be able to build the vfio driver as a kernel module. This is not enough, however: when CONFIG_CPUSETS is _not_ defined cpuset_cpus_allowed() is an inline function returning task_cpu_possible_mask(). For the arm64 architecture this function is also inline: it checks the arm64_mismatched_32bit_el0 static key and calls system_32bit_el0_cpumask(). We need to export those symbols as well. Signed-off-by: Fred Griffoul Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202406060731.L3NSR1Hy-lkp@intel.com/ Closes: https://lore.kernel.org/oe-kbuild-all/202406070659.pYu6zNrx-lkp@intel.com/ Closes: https://lore.kernel.org/oe-kbuild-all/202406101154.iaDyTRwZ-lkp@intel.com/ Acked-by: Waiman Long Acked-by: Catalin Marinas --- arch/arm64/kernel/cpufeature.c | 2 ++ kernel/cgroup/cpuset.c | 1 + 2 files changed, 3 insertions(+) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 56583677c1f2..2f1de6343bee 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -127,6 +127,7 @@ static bool __read_mostly allow_mismatched_32bit_el0; * seen at least one CPU capable of 32-bit EL0. */ DEFINE_STATIC_KEY_FALSE(arm64_mismatched_32bit_el0); +EXPORT_SYMBOL_GPL(arm64_mismatched_32bit_el0); /* * Mask of CPUs supporting 32-bit EL0. @@ -1614,6 +1615,7 @@ const struct cpumask *system_32bit_el0_cpumask(void) return cpu_possible_mask; } +EXPORT_SYMBOL_GPL(system_32bit_el0_cpumask); static int __init parse_32bit_el0_param(char *str) { diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 4237c8748715..9fd56222aa4b 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -4764,6 +4764,7 @@ void cpuset_cpus_allowed(struct task_struct *tsk, struct cpumask *pmask) rcu_read_unlock(); spin_unlock_irqrestore(&callback_lock, flags); } +EXPORT_SYMBOL_GPL(cpuset_cpus_allowed); /** * cpuset_cpus_allowed_fallback - final fallback before complete catastrophe.