From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B1A67C433DF for ; Fri, 29 May 2020 07:41:30 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 901A1208A7 for ; Fri, 29 May 2020 07:41:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 901A1208A7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E911A6E87C; Fri, 29 May 2020 07:41:18 +0000 (UTC) Received: from mail-pj1-f65.google.com (mail-pj1-f65.google.com [209.85.216.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id E97EE6E87B; Fri, 29 May 2020 07:41:14 +0000 (UTC) Received: by mail-pj1-f65.google.com with SMTP id z15so2903018pjb.0; Fri, 29 May 2020 00:41:14 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ztkbZyMAj8QAP+BJLtRR/lmTCR2M8J8E3LJknwjviqU=; b=rMefjZxgUBeXlN80OZ6jnne43tmd7cpRvwgnQExfhGhbgCh8JHVaftLGiNX5wTDKHm dVDdZMehl0+V4EhvdygtBzn0bppZz5W5scj/mUYPvT5pnj3MO925jWg+PJLfYsPaJK5i McediRVH3erC/E++o99+qvo/gCc1TQ4w1Wb9zL6Iy3YoBE5BvunoDLKPZzx6i6Kff5a4 EpZb8S+EH56dKBMuiP8e1OSOnybd9oYI5sdmCTjv7xek8YZyz2ZJPK///DcwUJrUgy0a DQvc5NgI6jgC92X+Qg4ldpAXGp6zA4vgPOieu/kGCcb7O/tcqWuTd2MAHvQDel4+sF2y Dgxw== X-Gm-Message-State: AOAM530PbLdj+JeBZU7vJeqxuHHGmpVn3KM06SAzKOLmLrSQ4Iewu/qF On5i4tK9sRC1bdl+GvO8y/Q= X-Google-Smtp-Source: ABdhPJwef9VnxevTutof/OWjXxMen8nqP316VSHb8lndoYqWe0y1ALBADBIyXeEXdBPr/HgBfKduig== X-Received: by 2002:a17:902:bd95:: with SMTP id q21mr7959305pls.238.1590738074446; Fri, 29 May 2020 00:41:14 -0700 (PDT) Received: from 42.do-not-panic.com (42.do-not-panic.com. [157.230.128.187]) by smtp.gmail.com with ESMTPSA id e26sm6189878pgl.27.2020.05.29.00.41.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 May 2020 00:41:12 -0700 (PDT) Received: by 42.do-not-panic.com (Postfix, from userid 1000) id 10D65418C0; Fri, 29 May 2020 07:41:10 +0000 (UTC) From: Luis Chamberlain To: keescook@chromium.org, yzaikin@google.com, nixiaoming@huawei.com, ebiederm@xmission.com, axboe@kernel.dk, clemens@ladisch.de, arnd@arndb.de, gregkh@linuxfoundation.org, jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, airlied@linux.ie, daniel@ffwll.ch, benh@kernel.crashing.org, rdna@fb.com, viro@zeniv.linux.org.uk, mark@fasheh.com, jlbec@evilplan.org, joseph.qi@linux.alibaba.com, vbabka@suse.cz, sfr@canb.auug.org.au, jack@suse.cz, amir73il@gmail.com, rafael@kernel.org, tytso@mit.edu Subject: [PATCH 01/13] sysctl: add new register_sysctl_subdir() helper Date: Fri, 29 May 2020 07:40:56 +0000 Message-Id: <20200529074108.16928-2-mcgrof@kernel.org> X-Mailer: git-send-email 2.23.0.rc1 In-Reply-To: <20200529074108.16928-1-mcgrof@kernel.org> References: <20200529074108.16928-1-mcgrof@kernel.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, julia.lawall@lip6.fr, Luis Chamberlain , akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org, ocfs2-devel@oss.oracle.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Often enough all we need to do is create a subdirectory so that we can stuff sysctls underneath it. However, *if* that directory was already created early on the boot sequence we really have no need to use the full boiler plate code for it, we can just use local variables to help us guide sysctl to place the new leaf files. So use a helper to do precisely this. Signed-off-by: Luis Chamberlain --- include/linux/sysctl.h | 11 +++++++++++ kernel/sysctl.c | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 48 insertions(+) diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index ddaa06ddd852..58bc978d4f03 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -205,6 +205,9 @@ void unregister_sysctl_table(struct ctl_table_header * table); extern int sysctl_init(void); extern void register_sysctl_init(const char *path, struct ctl_table *table, const char *table_name); +extern struct ctl_table_header *register_sysctl_subdir(const char *base, + const char *subdir, + struct ctl_table *table); void do_sysctl_args(void); extern int pwrsw_enabled; @@ -223,6 +226,14 @@ static inline struct ctl_table_header *register_sysctl_table(struct ctl_table * return NULL; } +static +inline struct ctl_table_header *register_sysctl_subdir(const char *base, + const char *subdir, + struct ctl_table *table) +{ + return NULL; +} + static inline struct ctl_table_header *register_sysctl_paths( const struct ctl_path *path, struct ctl_table *table) { diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 008ac0576ae5..04ff032f2863 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -3195,6 +3195,43 @@ void __init register_sysctl_init(const char *path, struct ctl_table *table, } kmemleak_not_leak(hdr); } + +struct ctl_table_header *register_sysctl_subdir(const char *base, + const char *subdir, + struct ctl_table *table) +{ + struct ctl_table_header *hdr = NULL; + struct ctl_table subdir_table[] = { + { + .procname = subdir, + .mode = 0555, + .child = table, + }, + { } + }; + struct ctl_table base_table[] = { + { + .procname = base, + .mode = 0555, + .child = subdir_table, + }, + { } + }; + + if (!table->procname) + goto out; + + hdr = register_sysctl_table(base_table); + if (unlikely(!hdr)) { + pr_err("failed when creating subdirectory sysctl %s/%s/%s\n", + base, subdir, table->procname); + goto out; + } + kmemleak_not_leak(hdr); +out: + return hdr; +} +EXPORT_SYMBOL_GPL(register_sysctl_subdir); #endif /* CONFIG_SYSCTL */ /* * No sense putting this after each symbol definition, twice, -- 2.26.2 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel