From patchwork Wed Apr 28 13:59:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Justin He X-Patchwork-Id: 429122 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_RED,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 2C7B3C43460 for ; Wed, 28 Apr 2021 13:59:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E425F61431 for ; Wed, 28 Apr 2021 13:59:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240084AbhD1OAj (ORCPT ); Wed, 28 Apr 2021 10:00:39 -0400 Received: from foss.arm.com ([217.140.110.172]:42942 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240085AbhD1OAe (ORCPT ); Wed, 28 Apr 2021 10:00:34 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 651B3ED1; Wed, 28 Apr 2021 06:59:49 -0700 (PDT) Received: from entos-ampere-02.shanghai.arm.com (entos-ampere-02.shanghai.arm.com [10.169.214.110]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7279A3F694; Wed, 28 Apr 2021 06:59:43 -0700 (PDT) From: Jia He To: Linus Torvalds , Petr Mladek , Steven Rostedt , Sergey Senozhatsky , Andy Shevchenko , Rasmus Villemoes , Jonathan Corbet , Luca Coelho , Kalle Valo , "David S. Miller" , Jakub Kicinski , Heiko Carstens , Vasily Gorbik Cc: Christian Borntraeger , Johannes Berg , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-s390@vger.kernel.org, Jia He Subject: [PATCH 2/4] lib/vsprintf.c: Make %p{D, d} mean as much components as possible Date: Wed, 28 Apr 2021 21:59:27 +0800 Message-Id: <20210428135929.27011-2-justin.he@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210428135929.27011-1-justin.he@arm.com> References: <20210428135929.27011-1-justin.he@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Linus Torvalds We have '%pD'(no digit following) for printing a filename. It may not be perfect (by default it only prints one component. %pD4 should be more than good enough, but we should make plain "%pD" mean "as much of the path that is reasonable" rather than "as few components as possible" (ie 1). Signed-off-by: Linus Torvalds Signed-off-by: Jia He Signed-off-by: Jia He --- Documentation/core-api/printk-formats.rst | 3 ++- lib/vsprintf.c | 4 ++-- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index 9be6de402cb9..aa76cbec0dae 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -413,7 +413,8 @@ dentry names For printing dentry name; if we race with :c:func:`d_move`, the name might be a mix of old and new ones, but it won't oops. %pd dentry is a safer equivalent of %s dentry->d_name.name we used to use, %pd prints ``n`` -last components. %pD does the same thing for struct file. +last components. %pD does the same thing for struct file. By default, %p{D,d} +is equal to %p{D,d}4. Passed by reference. diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 6c56c62fd9a5..5b563953f970 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -880,11 +880,11 @@ char *dentry_name(char *buf, char *end, const struct dentry *d, struct printf_sp int i, n; switch (fmt[1]) { - case '2': case '3': case '4': + case '1': case '2': case '3': case '4': depth = fmt[1] - '0'; break; default: - depth = 1; + depth = 4; } rcu_read_lock();