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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 986C7C43441 for ; Thu, 29 Nov 2018 21:11:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6955D2086B for ; Thu, 29 Nov 2018 21:11:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6955D2086B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rjwysocki.net 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 S1726364AbeK3ISX (ORCPT ); Fri, 30 Nov 2018 03:18:23 -0500 Received: from cloudserver094114.home.pl ([79.96.170.134]:43119 "EHLO cloudserver094114.home.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726152AbeK3ISX (ORCPT ); Fri, 30 Nov 2018 03:18:23 -0500 Received: from 79.184.252.167.ipv4.supernova.orange.pl (79.184.252.167) (HELO aspire.rjw.lan) by serwer1319399.home.pl (79.96.170.134) with SMTP (IdeaSmtpServer 0.83.157) id 70fcd2818958754a; Thu, 29 Nov 2018 22:11:36 +0100 From: "Rafael J. Wysocki" To: Heikki Krogerus Cc: Dmitry Torokhov , Linus Walleij , Andy Shevchenko , Mika Westerberg , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org Subject: Re: [PATCH v2 0/6] device property: Introducing software nodes Date: Thu, 29 Nov 2018 22:11:29 +0100 Message-ID: <1859438.TcbhMcUUHz@aspire.rjw.lan> In-Reply-To: <20181109142138.54770-1-heikki.krogerus@linux.intel.com> References: <20181109142138.54770-1-heikki.krogerus@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Friday, November 9, 2018 3:21:32 PM CET Heikki Krogerus wrote: > Hi, > > This is the second version of my proposal for "software nodes". There > was a "dereferencing freed memory" bug in patch 3/5 which is now > fixed. device_add_properties() and device_remove_properties() no > longer change places in the code as requested by Andy. > > The original RFC can be checked from here: > https://lkml.org/lkml/2018/10/12/518 > > The origin commit message: > > To continue the discussion started by Dmitry [1], this is my proposal > that I mentioned in my last mail. In short, the idea is that instead > of trying to extend the support for the currently used struct > property_set, I'm proposing that we introduce a completely new, > independent type of fwnode, and replace the struct property_set with > it. I'm calling the type "software node" here. > > The reason for a complete separation of the software nodes from the > generic property handling code is the need to be able to create the > nodes independently from the devices that they are bind to. > > The way this works is that every node that is created will have a > kobject registered. That will take care the ref counting for us, and > also allow us to for example display the properties in sysfs. > > There are a few more details in patch 3/5 about the software nodes in > the commit message. > > [1] https://lkml.org/lkml/2018/9/17/1067 > > -- > heikki > > > Heikki Krogerus (6): > driver core: platform: Remove duplicated device_remove_properties() > call > drivers core: Prepare support for multiple platform notifications > ACPI / glue: Add acpi_platform_notify() function > drivers: base: Introducing software nodes to the firmware node > framework > device property: Move device_add_properties() to swnode.c > device property: Remove struct property_set > > .../ABI/testing/sysfs-devices-software_node | 10 + > drivers/acpi/bus.c | 1 - > drivers/acpi/glue.c | 21 +- > drivers/acpi/internal.h | 1 - > drivers/base/Makefile | 2 +- > drivers/base/core.c | 34 +- > drivers/base/platform.c | 1 - > drivers/base/property.c | 511 +------------ > drivers/base/swnode.c | 678 ++++++++++++++++++ > include/linux/acpi.h | 10 + > include/linux/property.h | 12 + > 11 files changed, 768 insertions(+), 513 deletions(-) > create mode 100644 Documentation/ABI/testing/sysfs-devices-software_node > create mode 100644 drivers/base/swnode.c > > All [1-6/6] applied, thanks!