From patchwork Fri Oct 25 09:41:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 11212017 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7355B1390 for ; Fri, 25 Oct 2019 11:10:21 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 50DDA2084C for ; Fri, 25 Oct 2019 11:10:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="DOvzQGrp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 50DDA2084C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=glider.be Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=+om/IUfcge+dFJd9U3/5GtOFoXP1DsYTwjwBf0tMRjY=; b=DOvzQGrpqCgcdHpd5adpKxjAKp +/+ah1j+zfbuD/yk1rD3/MQxcxVdFs9WHjY52wFqgZOqHYO1vcs3+HcBm2hcmLS0KY+0f/SYfWy70 qqBJ3WLskj0DsYd84NwrA9+7Tl8xP8ENx7EXaJRqjTdAyHh7HkjmupJF+52eptxjICQ3MIeKn39p6 eArISvr5+FYow17S0uRL9xIKoFWqDsHgFJsIUYKH2xnrTp68qCd7E2ag02UdoAE5IhMTF1pqsYsoI FdUcngKmKRH1EorzmBYN7bpG8Uc0Bj/II6G43YKtNDq3MqsJTY/QFVDf8UtQt5oDOinoR0iyaghEM +1lXEeCw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iNxU1-0006ga-0A; Fri, 25 Oct 2019 11:10:17 +0000 Received: from andre.telenet-ops.be ([2a02:1800:120:4::f00:15]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iNxSZ-000480-T1 for linux-arm-kernel@lists.infradead.org; Fri, 25 Oct 2019 11:08:51 +0000 Received: from ramsan ([84.195.182.253]) by andre.telenet-ops.be with bizsmtp id Hn8b2100L5USYZQ01n8bdM; Fri, 25 Oct 2019 13:08:43 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan with esmtp (Exim 4.90_1) (envelope-from ) id 1iNxSN-0003rD-GA; Fri, 25 Oct 2019 13:08:35 +0200 Received: from geert by rox.of.borg with local (Exim 4.90_1) (envelope-from ) id 1iNw6A-0006ms-Jl; Fri, 25 Oct 2019 11:41:34 +0200 From: Geert Uytterhoeven To: Jonathan Corbet , Greg Kroah-Hartman , Ludovic Desroches , Ulf Hansson , Nicolas Ferre , Alexandre Belloni , Jaehoon Chung , "David S . Miller" , "Rafael J . Wysocki" , Johannes Berg Subject: [PATCH v2 1/7] debugfs: Add debugfs_create_xul() for hexadecimal unsigned long Date: Fri, 25 Oct 2019 11:41:24 +0200 Message-Id: <20191025094130.26033-2-geert+renesas@glider.be> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191025094130.26033-1-geert+renesas@glider.be> References: <20191025094130.26033-1-geert+renesas@glider.be> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191025_040848_118325_7F449D7F X-CRM114-Status: GOOD ( 13.16 ) X-Spam-Score: -0.4 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.4 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [2a02:1800:120:4:0:0:f00:15 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.2 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level mail domains are different 0.0 SPF_NONE SPF: sender does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Geert Uytterhoeven , linux-doc@vger.kernel.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The existing debugfs_create_ulong() function supports objects of type "unsigned long", which are 32-bit or 64-bit depending on the platform, in decimal form. To format objects in hexadecimal, various debugfs_create_x*() functions exist, but all of them take fixed-size types. Add a debugfs helper for "unsigned long" objects in hexadecimal format. This avoids the need for users to open-code the same, or introduce bugs when casting the value pointer to "u32 *" or "u64 *" to call debugfs_create_x{32,64}(). Signed-off-by: Geert Uytterhoeven --- v2: - Add kerneldoc, - Update Documentation/filesystems/debugfs.txt. --- Documentation/filesystems/debugfs.txt | 5 ++++- include/linux/debugfs.h | 21 +++++++++++++++++++++ 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/Documentation/filesystems/debugfs.txt b/Documentation/filesystems/debugfs.txt index 50e8f91f2421ec04..8c8e60fe8c7deb86 100644 --- a/Documentation/filesystems/debugfs.txt +++ b/Documentation/filesystems/debugfs.txt @@ -102,11 +102,14 @@ functions meant to help out in such special cases: As might be expected, this function will create a debugfs file to represent a variable of type size_t. -Similarly, there is a helper for variables of type unsigned long: +Similarly, there are helpers for variables of type unsigned long, in decimal +and hexadecimal: struct dentry *debugfs_create_ulong(const char *name, umode_t mode, struct dentry *parent, unsigned long *value); + void debugfs_create_xul(const char *name, umode_t mode, + struct dentry *parent, unsigned long *value); Boolean values can be placed in debugfs with: diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h index 33690949b45d6904..af6c2e5b7d3c7afa 100644 --- a/include/linux/debugfs.h +++ b/include/linux/debugfs.h @@ -356,4 +356,25 @@ static inline ssize_t debugfs_write_file_bool(struct file *file, #endif +/** + * debugfs_create_xul - create a debugfs file that is used to read and write an + * unsigned long value, formatted in hexadecimal + * @name: a pointer to a string containing the name of the file to create. + * @mode: the permission that the file should have + * @parent: a pointer to the parent dentry for this file. This should be a + * directory dentry if set. If this parameter is %NULL, then the + * file will be created in the root of the debugfs filesystem. + * @value: a pointer to the variable that the file should read to and write + * from. + */ +static inline void debugfs_create_xul(const char *name, umode_t mode, + struct dentry *parent, + unsigned long *value) +{ + if (sizeof(*value) == sizeof(u32)) + debugfs_create_x32(name, mode, parent, (u32 *)value); + else + debugfs_create_x64(name, mode, parent, (u64 *)value); +} + #endif