From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.6 required=5.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 847547D062 for ; Thu, 28 Jun 2018 13:11:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965570AbeF1NLB (ORCPT ); Thu, 28 Jun 2018 09:11:01 -0400 Received: from mail-wr0-f195.google.com ([209.85.128.195]:33815 "EHLO mail-wr0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965459AbeF1NK5 (ORCPT ); Thu, 28 Jun 2018 09:10:57 -0400 Received: by mail-wr0-f195.google.com with SMTP id a12-v6so5484664wro.1 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=D7raMhXXkLTV77EGLgVZY5azrqpjUI10PrVQMnsPXjBYhOihfSUjl9AJPPoFc2cFLn EJvM67A0tJz8qI+ZtGgcti79UU2bQE2KFmuZObTFA5+zgti4sBqA/S1pwf1iVZ04RJtg uO/mqVmAo3iTiCmOgqwm2Sg5pv1sKdaIbvgvCHyv8U8t9EYZzO+uwqPcBgo1Fbksu0Pc FGm7AoyFvEJIaxxSnzEPmD7tH9uc9Iccf4oeqLIh4uE+0425RAkwRWN25TBFV/LWmeik sZvQf/sJ1Frg1dmCMYaPLdSjY64kjsshm7s/xkZKG7gP32RKAGannabsn9lFNjLmE2nG m+ug== X-Gm-Message-State: APt69E118aOe1kO+7zSgeLypnI8MP6mQSorSsZni7Yz2aG8DNIoMfXFT cuLKO9yRD5J98n950p4S14wHLA== 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-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@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 > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html