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=-2.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, T_DKIMWL_WL_HIGH,URIBL_BLOCKED,USER_AGENT_GIT 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 7BEF9C433F5 for ; Fri, 7 Sep 2018 21:41:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2FA6F20844 for ; Fri, 7 Sep 2018 21:41:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.de header.i=@amazon.de header.b="rKVEXV/J" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2FA6F20844 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=amazon.de 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 S1730309AbeIHCYW (ORCPT ); Fri, 7 Sep 2018 22:24:22 -0400 Received: from smtp-fw-6002.amazon.com ([52.95.49.90]:2841 "EHLO smtp-fw-6002.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729502AbeIHCYU (ORCPT ); Fri, 7 Sep 2018 22:24:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.de; i=@amazon.de; q=dns/txt; s=amazon201209; t=1536356485; x=1567892485; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=/dZ5LLpx2KgS0hOfSWMQeo+PIufJsoKR0fzFom6iZjw=; b=rKVEXV/J3ew0xqdgDOKZbyaIhDJf6dp03de8HWGdb9V1UGDnMnKf5UW0 /BURR9DN64KTtIaA2RsMR11VUaZf++0h23Iv571n+8YCQKp2Gk7r5pdNt aVcUeo0JA9D9GourKs6l10s+88M5SDsieDRV485Ud7niBYfR6uI/YzBzP c=; X-IronPort-AV: E=Sophos;i="5.53,343,1531785600"; d="scan'208";a="361243110" Received: from iad6-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-1a-e34f1ddc.us-east-1.amazon.com) ([10.124.125.6]) by smtp-border-fw-out-6002.iad6.amazon.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 07 Sep 2018 21:41:25 +0000 Received: from u7588a65da6b65f.ant.amazon.com (iad7-ws-svc-lb50-vlan2.amazon.com [10.0.93.210]) by email-inbound-relay-1a-e34f1ddc.us-east-1.amazon.com (8.14.7/8.14.7) with ESMTP id w87LfJRH034269 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL); Fri, 7 Sep 2018 21:41:21 GMT Received: from u7588a65da6b65f.ant.amazon.com (localhost [127.0.0.1]) by u7588a65da6b65f.ant.amazon.com (8.15.2/8.15.2/Debian-3) with ESMTPS id w87LfHP9027137 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 7 Sep 2018 23:41:17 +0200 Received: (from jschoenh@localhost) by u7588a65da6b65f.ant.amazon.com (8.15.2/8.15.2/Submit) id w87LfGg4027136; Fri, 7 Sep 2018 23:41:16 +0200 From: =?UTF-8?q?Jan=20H=2E=20Sch=C3=B6nherr?= To: Ingo Molnar , Peter Zijlstra Cc: =?UTF-8?q?Jan=20H=2E=20Sch=C3=B6nherr?= , linux-kernel@vger.kernel.org Subject: [RFC 05/60] sched: Allow to retrieve the sched_domain_topology Date: Fri, 7 Sep 2018 23:39:52 +0200 Message-Id: <20180907214047.26914-6-jschoenh@amazon.de> X-Mailer: git-send-email 2.9.3.1.gcba166c.dirty In-Reply-To: <20180907214047.26914-1-jschoenh@amazon.de> References: <20180907214047.26914-1-jschoenh@amazon.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org While it is possible to simply overwrite the sched_domain_topology, it was not possible to retrieve the sched_domain_topology to modify it instead. Add a function to enable that use case. Note, that this does not help with the already existing potential memory leak, when one dynamically allocated sched_domain_topology is replaced with another one. Signed-off-by: Jan H. Schönherr --- include/linux/sched/topology.h | 1 + kernel/sched/topology.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/include/linux/sched/topology.h b/include/linux/sched/topology.h index f78534f1cc1e..28d037d0050e 100644 --- a/include/linux/sched/topology.h +++ b/include/linux/sched/topology.h @@ -194,6 +194,7 @@ struct sched_domain_topology_level { }; extern void set_sched_topology(struct sched_domain_topology_level *tl); +struct sched_domain_topology_level *get_sched_topology(void); #ifdef CONFIG_SCHED_DEBUG # define SD_INIT_NAME(type) .name = #type diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 0f2c3aa0a097..f2db2368ac5f 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -1226,6 +1226,11 @@ void set_sched_topology(struct sched_domain_topology_level *tl) } } +struct sched_domain_topology_level *get_sched_topology(void) +{ + return sched_domain_topology; +} + #ifdef CONFIG_NUMA static const struct cpumask * -- 2.9.3.1.gcba166c.dirty