From patchwork Sun Jan 10 19:30:49 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Michael S. Tsirkin" X-Patchwork-Id: 7997661 Return-Path: X-Original-To: patchwork-linux-sh@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 623C1BEEE5 for ; Sun, 10 Jan 2016 19:31:41 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A31FE20379 for ; Sun, 10 Jan 2016 19:31:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B5A6120374 for ; Sun, 10 Jan 2016 19:31:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757419AbcAJTbE (ORCPT ); Sun, 10 Jan 2016 14:31:04 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34782 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757375AbcAJTbA (ORCPT ); Sun, 10 Jan 2016 14:31:00 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (Postfix) with ESMTPS id 20980AA7; Sun, 10 Jan 2016 19:31:00 +0000 (UTC) Received: from redhat.com (vpn1-5-155.ams2.redhat.com [10.36.5.155]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with SMTP id u0AJUncb021519; Sun, 10 Jan 2016 14:30:50 -0500 Date: Sun, 10 Jan 2016 21:30:49 +0200 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: Andy Whitcroft , Joe Perches , Peter Zijlstra , Arnd Bergmann , linux-arch@vger.kernel.org, Andrew Cooper , virtualization@lists.linux-foundation.org, Stefano Stabellini , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , David Miller , linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-metag@vger.kernel.org, linux-mips@linux-mips.org, x86@kernel.org, user-mode-linux-devel@lists.sourceforge.net, adi-buildroot-devel@lists.sourceforge.net, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, xen-devel@lists.xenproject.org, Ingo Molnar , Tony Lindgren , Andrey Konovalov , Russell King - ARM Linux Subject: [PATCH v3 2/3] checkpatch: check for __smp outside barrier.h Message-ID: <1452454200-8844-3-git-send-email-mst@redhat.com> References: <1452454200-8844-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1452454200-8844-1-git-send-email-mst@redhat.com> X-Mutt-Fcc: =sent X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Introduction of __smp barriers cleans up a bunch of duplicate code, but it gives people an additional handle onto a "new" set of barriers - just because they're prefixed with __* unfortunately doesn't stop anyone from using it (as happened with other arch stuff before.) Add a checkpatch test so it will trigger a warning. Reported-by: Russell King Signed-off-by: Michael S. Tsirkin --- scripts/checkpatch.pl | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 1c01b7d..15cfca4 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -5143,6 +5143,16 @@ sub process { } } + my $underscore_smp_barriers = qr{__smp_(?:$smp_barrier_stems)}x; + + if ($realfile !~ m@^include/asm-generic/@ && + $realfile !~ m@/barrier\.h$@ && + $line =~ m/\b(?:$underscore_smp_barriers)\s*\(/ && + $line !~ m/^.\s*\#\s*define\s+(?:$underscore_smp_barriers)\s*\(/) { + WARN("MEMORY_BARRIER", + "__smp memory barriers shouldn't be used outside barrier.h and asm-generic\n" . $herecurr); + } + # check for waitqueue_active without a comment. if ($line =~ /\bwaitqueue_active\s*\(/) { if (!ctx_has_comment($first_line, $linenr)) {