From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8D1B21E536 for ; Tue, 19 Mar 2024 08:07:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710835667; cv=none; b=iHj67VLdeYtCQIMeWbFVVNdzRN1LDKfvt4uxH6r9tO3kT6jMJRGoxPPvQMQay1EVU37N/QCs6LLT0aXlMAw8Z7LGAJ46ITKHMMFLgjMkrmcKUicnta1CzGBCEXo/p1HIILV45U+ZDoGyPPDyje5dS8vzGIsEFlecVG6vHzO8Ric= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710835667; c=relaxed/simple; bh=/w/zGp+6caynLt5a1IRLQANkV+psX+d6vhFgrb8iuxw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: In-Reply-To:Content-Type:Content-Disposition; b=KwnZlxr6f+7aKwkLHO7/4ESxSoLsOVgytsuutnYveg0OJ8TPG6zWnb5ffyF2rt8EQWsVwn2VX5Uba1c99d9h65BdVYQADTVHb1mR74CyjLQ7NzioXiTADu8eoY5gW2rwjJ8pPqnGxfbrzkKBzFC8crPIs+K9UsZT1r0lnHhr1wE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=YOM9NkTp; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="YOM9NkTp" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1710835664; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Brx1qXj6ySPCxBXSnAz0cSXPx7haDLloEWY7AmubMOk=; b=YOM9NkTp58TL1EqkXqAUynr8EoXjxyO5UNCJ5ri2slhIHMZ2YuxPC0A6jtR1rg8TF9FkRz Bv8yuvwbgHLaPDeDnsLGQgK9+4F3qeUQo9tHsPg9lDbcDUx+wGfHbXEZSupjTXNv+x5n2X CT3DpYFEfbG7vtJZXF/sEiBmN76KtmM= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-515-_8-bYqshMgmRjAw4nbc-Lg-1; Tue, 19 Mar 2024 04:07:41 -0400 X-MC-Unique: _8-bYqshMgmRjAw4nbc-Lg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 85774101A5B3; Tue, 19 Mar 2024 08:07:40 +0000 (UTC) Received: from tucnak.zalov.cz (unknown [10.39.192.57]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 2C2FD40C6DB3; Tue, 19 Mar 2024 08:07:40 +0000 (UTC) Received: from tucnak.zalov.cz (localhost [127.0.0.1]) by tucnak.zalov.cz (8.17.1/8.17.1) with ESMTPS id 42J87JlE683294 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Tue, 19 Mar 2024 09:07:19 +0100 Received: (from jakub@localhost) by tucnak.zalov.cz (8.17.1/8.17.1/Submit) id 42J87GYA683293; Tue, 19 Mar 2024 09:07:16 +0100 Date: Tue, 19 Mar 2024 09:07:16 +0100 From: Jakub Jelinek To: Marco Elver Cc: paulmck@kernel.org, linux-toolchains@vger.kernel.org, peterz@infradead.org, hpa@zytor.com, rostedt@goodmis.org, gregkh@linuxfoundation.org, keescook@chromium.org, torvalds@linux-foundation.org, Evgenii Stepanov , Kostya Serebryany Subject: Re: A few proposals, this time from the C++ standards committee Message-ID: Reply-To: Jakub Jelinek References: <83f5e119-6e32-415a-a1c8-8e6b0bd11a75@paulmck-laptop> Precedence: bulk X-Mailing-List: linux-toolchains@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.2 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit On Tue, Mar 19, 2024 at 08:41:27AM +0100, Marco Elver wrote: > Hi Paul, > > On Sun, 17 Mar 2024 at 10:14, Paul E. McKenney wrote: > > ------------------------------------------------------------------------ > [...] > > D3125R0 — Pointer tagging > > Another one that is late to the party, and thus not yet formally > > published. The idea is to provide a way to access pointer bits > > that are not relevant to pointer dereferencing for pointers to > > properly aligned objects or that are unused high-order bits. > > It would be nice. The devil is in the details. > > You mention it's not formally published, but is there a draft that is > already accessible somewhere? https://wg21.link/D3125R0 Jakub