From patchwork Fri Feb 3 09:42:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Huth X-Patchwork-Id: 13127297 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 15089C63797 for ; Fri, 3 Feb 2023 09:43:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232871AbjBCJnj (ORCPT ); Fri, 3 Feb 2023 04:43:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34904 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232775AbjBCJnh (ORCPT ); Fri, 3 Feb 2023 04:43:37 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45D581E29F for ; Fri, 3 Feb 2023 01:42:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1675417368; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=gq4Yn/0owA9XdbDg6QuVgQFBldHRzwq+OimRCX/v9mI=; b=SI0YOiE9FtQ4wIWa24MqtWAotg/WJWCLun4MZdiq8vXo/8knE3Hsb19ci6jrFpzk2x+hNO KNIojM4urywr4+o4EjslUkUMbp2kvRSdemma1HdG4L74FBD8Mp1Y1TUJ6LSYXRToVO++Cq ro3Ryslo11UTPNNRyM8wnxEx6eltedA= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-591-Z2JZTNm2PaWxScDI7rs6hw-1; Fri, 03 Feb 2023 04:42:41 -0500 X-MC-Unique: Z2JZTNm2PaWxScDI7rs6hw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 70D9329AB3FA; Fri, 3 Feb 2023 09:42:40 +0000 (UTC) Received: from thuth.com (unknown [10.39.192.204]) by smtp.corp.redhat.com (Postfix) with ESMTP id 70E31404CD80; Fri, 3 Feb 2023 09:42:37 +0000 (UTC) From: Thomas Huth To: kvm@vger.kernel.org, Paolo Bonzini , Sean Christopherson Cc: kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, kvm-riscv@lists.infradead.org, Marc Zyngier , James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , David Hildenbrand , linuxppc-dev@lists.ozlabs.org Subject: [PATCH 0/7] KVM: Standardize on "int" return types instead of "long" Date: Fri, 3 Feb 2023 10:42:23 +0100 Message-Id: <20230203094230.266952-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This patch series is a follow-up from one of my patches in 2022 and Sean's reply here: https://lore.kernel.org/kvm/YpZu6%2Fk+8EydfBKf@google.com/ KVM functions use "long" return values for functions that are wired up to "struct file_operations", but otherwise use "int" return values for functions that can return 0/-errno in order to avoid unintentional divergences between 32-bit and 64-bit kernels. Some related functions that are not part of a "struct file_operations" still use "long", though, which can cause confusion or even subtle problems (see second patch). Thus let's standardize on using "int" for return values in these functions to avoid such problems in the future. Thomas Huth (7): KVM: Standardize on "int" return types instead of "long" in kvm_main.c KVM: x86: Improve return type handling in kvm_vm_ioctl_get_nr_mmu_pages() KVM: Move KVM_GET_NR_MMU_PAGES into the deprecation section KVM: PPC: Standardize on "int" return types in the powerpc KVM code KVM: s390: Use "int" as return type for kvm_s390_get/set_skeys() KVM: arm64: Change return type of kvm_vm_ioctl_mte_copy_tags() to "int" KVM: Change return type of kvm_arch_vm_ioctl() to "int" arch/arm64/include/asm/kvm_host.h | 4 ++-- arch/arm64/kvm/arm.c | 3 +-- arch/arm64/kvm/guest.c | 4 ++-- arch/mips/kvm/mips.c | 4 ++-- arch/powerpc/include/asm/kvm_ppc.h | 14 +++++++------- arch/powerpc/kvm/book3s_64_mmu_hv.c | 14 +++++++------- arch/powerpc/kvm/book3s_64_vio.c | 4 ++-- arch/powerpc/kvm/book3s_hv.c | 6 +++--- arch/powerpc/kvm/book3s_pr.c | 4 ++-- arch/powerpc/kvm/powerpc.c | 5 ++--- arch/riscv/kvm/vm.c | 3 +-- arch/s390/kvm/kvm-s390.c | 7 +++---- arch/x86/kvm/x86.c | 8 +++++--- include/linux/kvm_host.h | 3 +-- include/uapi/linux/kvm.h | 3 ++- virt/kvm/kvm_main.c | 4 ++-- 16 files changed, 44 insertions(+), 46 deletions(-)