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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT autolearn=ham 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 29EF9C43144 for ; Thu, 28 Jun 2018 13:11:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 85C0D273E8 for ; Thu, 28 Jun 2018 13:11:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amarulasolutions.com header.i=@amarulasolutions.com header.b="dMOodLTe" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 85C0D273E8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=amarulasolutions.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965978AbeF1NLC (ORCPT ); Thu, 28 Jun 2018 09:11:02 -0400 Received: from mail-wr0-f193.google.com ([209.85.128.193]:42355 "EHLO mail-wr0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965245AbeF1NK5 (ORCPT ); Thu, 28 Jun 2018 09:10:57 -0400 Received: by mail-wr0-f193.google.com with SMTP id p1-v6so5472618wrs.9 for ; Thu, 28 Jun 2018 06:10:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amarulasolutions.com; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=czgCCwu5w8+Is78rh064XF2WOlg+3jlPMkGkQxjSbgI=; b=dMOodLTe7fotjawJjvny6HiMZLMx4DiUPptbG2rckHkpqbSKU+HECKwlv9SoW4MO+m 4fyjdoALBvwfK5XCGclBc65BtlJWrpu5HOqI7gYGUYAumYCNGsj8pCFZmBRXibsxD7xp eXpx3R8yDWjQMu1U+9UiyQnVKJfnf/NfWqt6g= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=czgCCwu5w8+Is78rh064XF2WOlg+3jlPMkGkQxjSbgI=; b=WRbCwjB7n7mw+G7IvqcBa9Ow++nb5Dja8BJJbViZzP3+KQhousmJ7jagNJsZ6bZs8m 6Lj3GCSQatuWBo8T+O+EVVMKbCvtI0aXRwrwUnp0vOxVYh1djrFhH9ELUzR9sN/al8Gj wEDImm7oxMrMRrxldRw7WGDwn96R7cNFOg9MNsxNwGSdCwseSCtu2JF3K0xjX4bGdVAU ap1OhTRDNDPdq5D92yjNcgFktcpopKnta2PVopFpPEUgCseqrhLLLGozbG987lZc6p7V bMp79qwsDWshDgAau3q9J4A/MJeTIelsFm5mwnaXn/oruosLl5+Nq9xEI+/NkzYKm6gm 0TQg== X-Gm-Message-State: APt69E2Wwnr0qABtqPfHAiDvH+nbU+8+2ezC3U6urvG4dMOFB9dr5avS X7DMWoainL/Kii/gMDjwGjaqPQ== X-Google-Smtp-Source: AAOMgpeG8+9JesYsh3uEbQSS0ggC7Yrix2TkX/lm3mDonFiXduh7966jpS0HY3ZIevMELon9PUlBEA== X-Received: by 2002:adf:f282:: with SMTP id k2-v6mr8259761wro.263.1530191456432; Thu, 28 Jun 2018 06:10:56 -0700 (PDT) Received: from andrea (85.100.broadband17.iol.cz. [109.80.100.85]) by smtp.gmail.com with ESMTPSA id o17-v6sm6723397wrp.62.2018.06.28.06.10.55 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 28 Jun 2018 06:10:55 -0700 (PDT) Date: Thu, 28 Jun 2018 15:10:49 +0200 From: Andrea Parri To: Matthew Wilcox Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Will Deacon , Alan Stern , Boqun Feng , Nicholas Piggin , David Howells , Jade Alglave , Luc Maranget , "Paul E . McKenney" , Akira Yokosawa , Daniel Lustig , Jonathan Corbet , Randy Dunlap Subject: Re: [PATCH 2/3] locking: Clarify requirements for smp_mb__after_spinlock() Message-ID: <20180628131049.GA14956@andrea> References: <1530182480-13205-1-git-send-email-andrea.parri@amarulasolutions.com> <1530182480-13205-3-git-send-email-andrea.parri@amarulasolutions.com> <20180628130258.GF7646@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180628130258.GF7646@bombadil.infradead.org> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Matthew, On Thu, Jun 28, 2018 at 06:02:58AM -0700, Matthew Wilcox wrote: > On Thu, Jun 28, 2018 at 12:41:19PM +0200, Andrea Parri wrote: > > + * smp_mb__after_spinlock() provides a full memory barrier between po-earlier > > + * lock acquisitions and po-later memory accesses. > > What does po-earlier mean? Partial order? "po" was intended as an abbreviation for "program order"; I should have kept the whole form..., thank you for the feedback. Andrea >