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Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 09/11] UAPI: ndctl: Fix g++-unsupported initialisation in headers From: David Howells To: linux-api@vger.kernel.org, linux-kbuild@vger.kernel.org Date: Wed, 05 Sep 2018 16:55:37 +0100 Message-ID: <153616293757.23468.13765050528392604035.stgit@warthog.procyon.org.uk> In-Reply-To: <153616286704.23468.584491117180383924.stgit@warthog.procyon.org.uk> References: <153616286704.23468.584491117180383924.stgit@warthog.procyon.org.uk> User-Agent: StGit/unknown-version MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Wed, 05 Sep 2018 15:55:39 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Wed, 05 Sep 2018 15:55:39 +0000 (UTC) for IP:'10.11.54.6' DOMAIN:'int-mx06.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'dhowells@redhat.com' RCPT:'' X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dhowells@redhat.com, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP The following code in the linux/ndctl header file: static inline const char *nvdimm_bus_cmd_name(unsigned cmd) { static const char * const names[] = { [ND_CMD_ARS_CAP] = "ars_cap", [ND_CMD_ARS_START] = "ars_start", [ND_CMD_ARS_STATUS] = "ars_status", [ND_CMD_CLEAR_ERROR] = "clear_error", [ND_CMD_CALL] = "cmd_call", }; if (cmd < ARRAY_SIZE(names) && names[cmd]) return names[cmd]; return "unknown"; } is broken in a number of ways: (1) ARRAY_SIZE() is not generally defined. Fix this by defining a label in the enum that indicates the number of commands. (2) g++ does not support "non-trivial" array initialisers fully yet. Fix this by defining the missing intermediate values. (3) Every file that calls this function will acquire a copy of names[]. The same goes for nvdimm_cmd_name(). A better way would be to remove these functions and their arrays from the header entirely. Signed-off-by: David Howells cc: Dan Williams cc: linux-nvdimm@lists.01.org --- include/uapi/linux/ndctl.h | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h index 7e27070b9440..9c89159f6a0f 100644 --- a/include/uapi/linux/ndctl.h +++ b/include/uapi/linux/ndctl.h @@ -117,6 +117,7 @@ enum { ND_CMD_VENDOR_EFFECT_LOG = 8, ND_CMD_VENDOR = 9, ND_CMD_CALL = 10, + nr__ND_CMD = 11 }; enum { @@ -128,22 +129,29 @@ enum { static inline const char *nvdimm_bus_cmd_name(unsigned cmd) { - static const char * const names[] = { + static const char * const names[nr__ND_CMD] = { + [0] = NULL, [ND_CMD_ARS_CAP] = "ars_cap", [ND_CMD_ARS_START] = "ars_start", [ND_CMD_ARS_STATUS] = "ars_status", [ND_CMD_CLEAR_ERROR] = "clear_error", + [5] = NULL, + [6] = NULL, + [7] = NULL, + [8] = NULL, + [9] = NULL, [ND_CMD_CALL] = "cmd_call", }; - if (cmd < ARRAY_SIZE(names) && names[cmd]) + if (cmd < nr__ND_CMD && names[cmd]) return names[cmd]; return "unknown"; } static inline const char *nvdimm_cmd_name(unsigned cmd) { - static const char * const names[] = { + static const char * const names[nr__ND_CMD] = { + [0] = NULL, [ND_CMD_SMART] = "smart", [ND_CMD_SMART_THRESHOLD] = "smart_thresh", [ND_CMD_DIMM_FLAGS] = "flags", @@ -156,7 +164,7 @@ static inline const char *nvdimm_cmd_name(unsigned cmd) [ND_CMD_CALL] = "cmd_call", }; - if (cmd < ARRAY_SIZE(names) && names[cmd]) + if (cmd < nr__ND_CMD && names[cmd]) return names[cmd]; return "unknown"; } From patchwork Wed Sep 5 15:55:44 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 10589105 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 31D96174C for ; Wed, 5 Sep 2018 15:55:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 206BB28844 for ; Wed, 5 Sep 2018 15:55:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 148AD2895F; Wed, 5 Sep 2018 15:55:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C263628844 for ; Wed, 5 Sep 2018 15:55:47 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id A9C512111B784; Wed, 5 Sep 2018 08:55:47 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=66.187.233.73; helo=mx1.redhat.com; envelope-from=dhowells@redhat.com; receiver=linux-nvdimm@lists.01.org Received: from mx1.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 526662111B770 for ; Wed, 5 Sep 2018 08:55:46 -0700 (PDT) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 81C7A40216E3; Wed, 5 Sep 2018 15:55:45 +0000 (UTC) Received: from warthog.procyon.org.uk (ovpn-123-84.rdu2.redhat.com [10.10.123.84]) by smtp.corp.redhat.com (Postfix) with ESMTP id AFD782156701; Wed, 5 Sep 2018 15:55:44 +0000 (UTC) Organization: Red Hat UK Ltd. 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Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 10/11] UAPI: ndctl: Remove use of PAGE_SIZE From: David Howells To: linux-api@vger.kernel.org, linux-kbuild@vger.kernel.org Date: Wed, 05 Sep 2018 16:55:44 +0100 Message-ID: <153616294415.23468.9444162145650526598.stgit@warthog.procyon.org.uk> In-Reply-To: <153616286704.23468.584491117180383924.stgit@warthog.procyon.org.uk> References: <153616286704.23468.584491117180383924.stgit@warthog.procyon.org.uk> User-Agent: StGit/unknown-version MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Wed, 05 Sep 2018 15:55:45 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Wed, 05 Sep 2018 15:55:45 +0000 (UTC) for IP:'10.11.54.6' DOMAIN:'int-mx06.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'dhowells@redhat.com' RCPT:'' X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dhowells@redhat.com, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP The macro PAGE_SIZE isn't valid outside of the kernel, so it should not appear in UAPI headers. Furthermore, the actual machine page size could theoretically change from an application's point of view if it's running in a container that gets migrated to another machine (say 4K/ppc64 to 64K/ppc64). Fixes: f2ba5a5baecf ("libnvdimm, namespace: make min namespace size 4K") Signed-off-by: David Howells cc: Dan Williams cc: linux-nvdimm@lists.01.org --- include/linux/ndctl.h | 22 ++++++++++++++++++++++ include/uapi/linux/ndctl.h | 4 ---- 2 files changed, 22 insertions(+), 4 deletions(-) create mode 100644 include/linux/ndctl.h diff --git a/include/linux/ndctl.h b/include/linux/ndctl.h new file mode 100644 index 000000000000..cd5a293ce3ae --- /dev/null +++ b/include/linux/ndctl.h @@ -0,0 +1,22 @@ +/* + * Copyright (c) 2014-2016, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU Lesser General Public License, + * version 2.1, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT ANY + * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for + * more details. + */ +#ifndef _LINUX_NDCTL_H +#define _LINUX_NDCTL_H + +#include + +enum { + ND_MIN_NAMESPACE_SIZE = PAGE_SIZE, +}; + +#endif /* _LINUX_NDCTL_H */ diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h index 9c89159f6a0f..bcda968e6d80 100644 --- a/include/uapi/linux/ndctl.h +++ b/include/uapi/linux/ndctl.h @@ -216,10 +216,6 @@ enum nd_driver_flags { ND_DRIVER_DAX_PMEM = 1 << ND_DEVICE_DAX_PMEM, }; -enum { - ND_MIN_NAMESPACE_SIZE = PAGE_SIZE, -}; - enum ars_masks { ARS_STATUS_MASK = 0x0000FFFF, ARS_EXT_STATUS_SHIFT = 16,