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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 BE287C433DF for ; Wed, 24 Jun 2020 19:02:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9927820836 for ; Wed, 24 Jun 2020 19:02:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593025359; bh=c0DVHKpqNywsBivnUUrd6P+QBrfaSnwkyVEyEHCow4s=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:List-ID: From; b=C2R0o05I+GIaJyMZl6hQvBi1jyHs0BtvvC27RLirlVPmeYwLWUnwarfa7HvqNKECX /NmJtX9YMJHrHwqc84DSgvN6lKkQugOQD0lmAxsLqQtAVEBlSjUXPX9z7YlqS2ieZA G4J3oPNTqsCMvNiyxqler7AN6qyC0Qyz8+2jYXOw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404744AbgFXTCi (ORCPT ); Wed, 24 Jun 2020 15:02:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:55326 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404055AbgFXTCh (ORCPT ); Wed, 24 Jun 2020 15:02:37 -0400 Received: from paulmck-ThinkPad-P72.home (50-39-105-78.bvtn.or.frontiernet.net [50.39.105.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EA4F52082F; Wed, 24 Jun 2020 19:02:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593025357; bh=c0DVHKpqNywsBivnUUrd6P+QBrfaSnwkyVEyEHCow4s=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=KczMdtn4UKd+mwp/0aySL/T3AfyrNAkwL0BQqd0BQKMnytBRjujy/RzXG6I5AogVB +P2GmMXEVqdDysIt/Jm7mgZCiaG7nAUuCpmjyiuJaKk+EnGiSbWDvfTmNMutHRFCd0 sIiaIKl1c8iWKbE8idwEFNZ7+TlJ5adxuD2Osp9I= Received: by paulmck-ThinkPad-P72.home (Postfix, from userid 1000) id C04CF35228BC; Wed, 24 Jun 2020 12:02:36 -0700 (PDT) Date: Wed, 24 Jun 2020 12:02:36 -0700 From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, kernel-team@fb.com, mingo@kernel.org Cc: elver@google.com, andreyknvl@google.com, glider@google.com, dvyukov@google.com, cai@lca.pw, boqun.feng@gmail.com Subject: Re: [PATCH kcsan 0/10] KCSAN updates for v5.9 Message-ID: <20200624190236.GA6603@paulmck-ThinkPad-P72> Reply-To: paulmck@kernel.org References: <20200623004310.GA26995@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200623004310.GA26995@paulmck-ThinkPad-P72> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jun 22, 2020 at 05:43:10PM -0700, Paul E. McKenney wrote: > Hello! > > This series provides KCSAN updates: And three more, so that GCC can join Clang in the KCSAN fun. > 1. Annotate a data race in vm_area_dup(), courtesy of Qian Cai. > > 2. x86/mm/pat: Mark an intentional data race, courtesy of Qian Cai. > > 3. Add ASSERT_EXCLUSIVE_ACCESS() to __list_splice_init_rcu(). > > 4. Add test suite, courtesy of Marco Elver. > > 5. locking/osq_lock: Annotate a data race in osq_lock. > > 6. Prefer '__no_kcsan inline' in test, courtesy of Marco Elver. > > 7. Silence -Wmissing-prototypes warning with W=1, courtesy of Qian Cai. > > 8. Rename test.c to selftest.c, courtesy of Marco Elver. > > 9. Remove existing special atomic rules, courtesy of Marco Elver. > > 10. Add jiffies test to test suite, courtesy of Marco Elver. 11. Re-add GCC as a supported compiler. 12. Simplify compiler flags. 13. Disable branch tracing in core runtime. Please note that using GCC for KCSAN requires building your own compiler from recent mainline. Thanx, Paul ------------------------------------------------------------------------ The added three (#11-#13) only: ------------------------------------------------------------------------ Documentation/dev-tools/kcsan.rst | 3 ++- kernel/kcsan/Makefile | 6 +++--- lib/Kconfig.kcsan | 3 ++- scripts/Makefile.kcsan | 2 +- 4 files changed, 8 insertions(+), 6 deletions(-)