From patchwork Tue Feb 11 22:51:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 212907 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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS 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 8D3D5C3B187 for ; Tue, 11 Feb 2020 23:39:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6C2832073C for ; Tue, 11 Feb 2020 23:39:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728276AbgBKXjG (ORCPT ); Tue, 11 Feb 2020 18:39:06 -0500 Received: from cloudserver094114.home.pl ([79.96.170.134]:50793 "EHLO cloudserver094114.home.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728189AbgBKXjF (ORCPT ); Tue, 11 Feb 2020 18:39:05 -0500 Received: from 79.184.254.199.ipv4.supernova.orange.pl (79.184.254.199) (HELO kreacher.localnet) by serwer1319399.home.pl (79.96.170.134) with SMTP (IdeaSmtpServer 0.83.341) id ac3b5ede439dbdc3; Wed, 12 Feb 2020 00:39:03 +0100 From: "Rafael J. Wysocki" To: Linux PM Cc: LKML , Amit Kucheria Subject: [PATCH 00/28] PM: QoS: Get rid of unuseful code and rework CPU latency QoS interface Date: Tue, 11 Feb 2020 23:51:05 +0100 Message-ID: <1654227.8mz0SueHsU@kreacher> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Hi All, This series of patches is based on the observation that after commit c3082a674f46 ("PM: QoS: Get rid of unused flags") the only global PM QoS class in use is PM_QOS_CPU_DMA_LATENCY, but there is still a significant amount of code dedicated to the handling of global PM QoS classes in general. That code takes up space and adds overhead in vain, so it is better to get rid of it. Moreover, with that unuseful code removed, the interface for adding QoS requests for CPU latency becomes inelegant and confusing, so it is better to clean it up. Patches [01/28-12/28] do the first part described above, which also includes some assorted cleanups of the core PM QoS code that doesn't go away. Patches [13/28-25/28] rework the CPU latency QoS interface (in the classic "define stubs, migrate users, change the API proper" manner), patches [26-27/28] update the general comments and documentation to match the code after the previous changes and the last one makes the CPU latency QoS depend on CPU_IDLE (because cpuidle is the only user of its target value today). The majority of the patches in this series don't change the functionality of the code at all (at least not intentionally). Please refer to the changelogs of individual patches for details. Thanks!