From patchwork Sat Nov 21 16:50:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tom Rix X-Patchwork-Id: 330245 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, 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 9D413C64E7C for ; Sat, 21 Nov 2020 16:51:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 59CB42242B for ; Sat, 21 Nov 2020 16:51:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="PMDCQH+P" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727208AbgKUQvW (ORCPT ); Sat, 21 Nov 2020 11:51:22 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:35135 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726562AbgKUQvO (ORCPT ); Sat, 21 Nov 2020 11:51:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1605977471; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc; bh=zLH0U0S3qPuM/4/c12zDySDpu72UCHtVP0nLwv0orcI=; b=PMDCQH+PjaLILI+jmPRUPCxPNqZ9b1d+FDhMFgHSxhSENkqcfenVx43KFi13r+Ex7D2I2M EljLHUMjVzijt8UE/5TuEqt8gAu+s1/L0/cDhZWp3x/Zbeym6GJ6qKuvFiPa3BQkGiro+3 9hzEAFUTRPSRQlWmeMKcu1ZaUpOoL+8= Received: from mail-qk1-f197.google.com (mail-qk1-f197.google.com [209.85.222.197]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-292-VSU8xOmKO7yx4QQu8WGnSw-1; Sat, 21 Nov 2020 11:51:08 -0500 X-MC-Unique: VSU8xOmKO7yx4QQu8WGnSw-1 Received: by mail-qk1-f197.google.com with SMTP id 141so10867669qkh.18 for ; Sat, 21 Nov 2020 08:51:08 -0800 (PST) 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; bh=zLH0U0S3qPuM/4/c12zDySDpu72UCHtVP0nLwv0orcI=; b=g5zIQcDnRg4PlJRoTUmGhIJScdCgkKMd2lfy+cPkgbrZdMyksq8Lw6Aiql7PRG+fyS H/ZiOSLgZZLaOQ0xQLqiOWtmNLEEtxoELIhp0ZJHEhCDJ8+FJ0Ku+3Udh+LVAHYloC2p jtPUQfrasihaBNmEqH9ONwx0FNXbDVJankUK1P7mSIjFxb7h/rVjWQL3o9IWAMoVM4JT F3PZJt8OgHzH71RZuYy4Z0dpLhY3xefhhz5g84SUUFtb048YvKd1YshCIoQgM5XRmE6D iozO7dxbnTbFDen/SM51BfEFRezc7ghXFUlMG3jLgrlpMsfPpE06XMpcZ9pwFwNqRdnj cuUQ== X-Gm-Message-State: AOAM531+SpYFhJvzvSCfQBIGUUfMCM512KkF0U2eNIdiDKrZBzI4eXuB k1xTU9AMQxv5VJO7lsPw0UJ8L8eaUX3plE5xFuKrY1++Cjf1BQGqf+FrLppmOeqWoPE5Qdnggm9 2xoFwcpCYTDIFTZhQ X-Received: by 2002:a05:620a:15ce:: with SMTP id o14mr22885271qkm.231.1605977467694; Sat, 21 Nov 2020 08:51:07 -0800 (PST) X-Google-Smtp-Source: ABdhPJwJMB7Phx6GdQ/NzrSSCIOwTBjDbbn+gugDtHjIEeXte769cdu0l51J2LUn/+h4QxN+fnLujw== X-Received: by 2002:a05:620a:15ce:: with SMTP id o14mr22885248qkm.231.1605977467468; Sat, 21 Nov 2020 08:51:07 -0800 (PST) Received: from trix.remote.csb (075-142-250-213.res.spectrum.com. [75.142.250.213]) by smtp.gmail.com with ESMTPSA id j202sm4129196qke.108.2020.11.21.08.51.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 21 Nov 2020 08:51:06 -0800 (PST) From: trix@redhat.com To: trix@redhat.com, joe@perches.com, clang-built-linux@googlegroups.com Cc: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, tboot-devel@lists.sourceforge.net, kvm@vger.kernel.org, linux-crypto@vger.kernel.org, linux-acpi@vger.kernel.org, devel@acpica.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, netdev@vger.kernel.org, linux-media@vger.kernel.org, MPT-FusionLinux.pdl@broadcom.com, linux-scsi@vger.kernel.org, linux-wireless@vger.kernel.org, ibm-acpi-devel@lists.sourceforge.net, platform-driver-x86@vger.kernel.org, linux-usb@vger.kernel.org, linux-omap@vger.kernel.org, linux-fbdev@vger.kernel.org, ecryptfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, cluster-devel@redhat.com, linux-mtd@lists.infradead.org, keyrings@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, alsa-devel@alsa-project.org, bpf@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-nfs@vger.kernel.org, patches@opensource.cirrus.com Subject: [RFC] MAINTAINERS tag for cleanup robot Date: Sat, 21 Nov 2020 08:50:58 -0800 Message-Id: <20201121165058.1644182-1-trix@redhat.com> X-Mailer: git-send-email 2.18.4 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org A difficult part of automating commits is composing the subsystem preamble in the commit log. For the ongoing effort of a fixer producing one or two fixes a release the use of 'treewide:' does not seem appropriate. It would be better if the normal prefix was used. Unfortunately normal is not consistent across the tree. So I am looking for comments for adding a new tag to the MAINTAINERS file D: Commit subsystem prefix ex/ for FPGA DFL DRIVERS D: fpga: dfl: Continuing with cleaning up clang's -Wextra-semi-stmt A significant number of warnings are caused by function like macros with a trailing semicolon. For example. #define FOO(a) a++; <-- extra, unneeded semicolon void bar() { int v = 0; FOO(a); } Clang will warn at the FOO(a); expansion location. Instead of removing the semicolon there, the fixer removes semicolon from the macro definition. After the fixer, the code will be: #define FOO(a) a++ void bar() { int v = 0; FOO(a); } The fixer review is https://reviews.llvm.org/D91789 A run over allyesconfig for x86_64 finds 62 issues, 5 are false positives. The false positives are caused by macros passed to other macros and by some macro expansions that did not have an extra semicolon. This cleans up about 1,000 of the current 10,000 -Wextra-semi-stmt warnings in linux-next. An update to [RFC] clang tooling cleanup This change adds the clang-tidy-fix as a top level target and uses it to do the cleaning. The next iteration will do a loop of cleaners. This will mean breaking clang-tidy-fix out into its own processing function 'run_fixers'. Makefile: Add toplevel target clang-tidy-fix to makefile Calls clang-tidy with -fix option for a set of checkers that programatically fixes the kernel source in place, treewide. Signed-off-by: Tom Rix --- Makefile | 7 ++++--- scripts/clang-tools/run-clang-tools.py | 20 +++++++++++++++++--- 2 files changed, 21 insertions(+), 6 deletions(-) diff --git a/Makefile b/Makefile index 47a8add4dd28..57756dbb767b 100644 --- a/Makefile +++ b/Makefile @@ -1567,20 +1567,21 @@ help: echo '' @echo 'Static analysers:' @echo ' checkstack - Generate a list of stack hogs' @echo ' versioncheck - Sanity check on version.h usage' @echo ' includecheck - Check for duplicate included header files' @echo ' export_report - List the usages of all exported symbols' @echo ' headerdep - Detect inclusion cycles in headers' @echo ' coccicheck - Check with Coccinelle' @echo ' clang-analyzer - Check with clang static analyzer' @echo ' clang-tidy - Check with clang-tidy' + @echo ' clang-tidy-fix - Check and fix with clang-tidy' @echo '' @echo 'Tools:' @echo ' nsdeps - Generate missing symbol namespace dependencies' @echo '' @echo 'Kernel selftest:' @echo ' kselftest - Build and run kernel selftest' @echo ' Build, install, and boot kernel before' @echo ' running kselftest on it' @echo ' Run as root for full coverage' @echo ' kselftest-all - Build kernel selftest' @@ -1842,30 +1843,30 @@ nsdeps: modules quiet_cmd_gen_compile_commands = GEN $@ cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) $(extmod-prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ $(if $(CONFIG_MODULES), $(MODORDER)) FORCE $(call if_changed,gen_compile_commands) targets += $(extmod-prefix)compile_commands.json -PHONY += clang-tidy clang-analyzer +PHONY += clang-tidy-fix clang-tidy clang-analyzer ifdef CONFIG_CC_IS_CLANG quiet_cmd_clang_tools = CHECK $< cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< -clang-tidy clang-analyzer: $(extmod-prefix)compile_commands.json +clang-tidy-fix clang-tidy clang-analyzer: $(extmod-prefix)compile_commands.json $(call cmd,clang_tools) else -clang-tidy clang-analyzer: +clang-tidy-fix clang-tidy clang-analyzer: @echo "$@ requires CC=clang" >&2 @false endif # Scripts to check various things for consistency # --------------------------------------------------------------------------- PHONY += includecheck versioncheck coccicheck export_report includecheck: diff --git a/scripts/clang-tools/run-clang-tools.py b/scripts/clang-tools/run-clang-tools.py index fa7655c7cec0..c177ca822c56 100755 --- a/scripts/clang-tools/run-clang-tools.py +++ b/scripts/clang-tools/run-clang-tools.py @@ -22,43 +22,57 @@ def parse_arguments(): Returns: args: Dict of parsed args Has keys: [path, type] """ usage = """Run clang-tidy or the clang static-analyzer on a compilation database.""" parser = argparse.ArgumentParser(description=usage) type_help = "Type of analysis to be performed" parser.add_argument("type", - choices=["clang-tidy", "clang-analyzer"], + choices=["clang-tidy-fix", "clang-tidy", "clang-analyzer"], help=type_help) path_help = "Path to the compilation database to parse" parser.add_argument("path", type=str, help=path_help) return parser.parse_args() def init(l, a): global lock global args lock = l args = a def run_analysis(entry): # Disable all checks, then re-enable the ones we want checks = "-checks=-*," - if args.type == "clang-tidy": + fix = "" + header_filter = "" + if args.type == "clang-tidy-fix": + checks += "linuxkernel-macro-trailing-semi" + # + # Fix this + # #define M(a) a++; <-- clang-tidy fixes the problem here + # int f() { + # int v = 0; + # M(v); <-- clang reports problem here + # return v; + # } + fix += "-fix" + header_filter += "-header-filter=.*" + elif args.type == "clang-tidy": checks += "linuxkernel-*" else: checks += "clang-analyzer-*" - p = subprocess.run(["clang-tidy", "-p", args.path, checks, entry["file"]], + p = subprocess.run(["clang-tidy", "-p", args.path, checks, header_filter, fix, entry["file"]], stdout=subprocess.PIPE, stderr=subprocess.STDOUT, cwd=entry["directory"]) with lock: sys.stderr.buffer.write(p.stdout) def main(): args = parse_arguments()