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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 34E95C433EF for ; Wed, 10 Nov 2021 20:25:55 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7EE586113D for ; Wed, 10 Nov 2021 20:25:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 7EE586113D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4HqGZS2Vx9z3c8d for ; Thu, 11 Nov 2021 07:25:52 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=arm.com (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=valentin.schneider@arm.com; receiver=) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lists.ozlabs.org (Postfix) with ESMTP id 4HqGZ0543zz2xsW for ; Thu, 11 Nov 2021 07:25:25 +1100 (AEDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B0346101E; Wed, 10 Nov 2021 12:25:22 -0800 (PST) Received: from e113632-lin.cambridge.arm.com (e113632-lin.cambridge.arm.com [10.1.196.57]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7A8C83F5A1; Wed, 10 Nov 2021 12:25:20 -0800 (PST) From: Valentin Schneider To: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linuxppc-dev@lists.ozlabs.org, linux-kbuild@vger.kernel.org Subject: [PATCH v2 0/5] preempt: PREEMPT vs PREEMPT_DYNAMIC configs fixup Date: Wed, 10 Nov 2021 20:24:43 +0000 Message-Id: <20211110202448.4054153-1-valentin.schneider@arm.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marco Elver , Michal Marek , Peter Zijlstra , Frederic Weisbecker , Mike Galbraith , Nick Desaulniers , Steven Rostedt , Paul Mackerras , Masahiro Yamada , Ingo Molnar , Dmitry Vyukov Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Hi folks, Thanks to suggestions from Mike, Frederic and Marco I ended up with something that looks somewhat sane and with a minimal amount of crud. Patches ======= o Patch 1 is the meat of the topic and could be picked on its own if the rest is too icky. o Patch 2 introduces helpers for the dynamic preempt state o Patches 3-5 make use of said accessors where relevant. Testing ======= Briefly tested the dynamic part on an x86 kernel + QEMU. x86_64_defconfig gets me: Dynamic Preempt: voluntary and appending preempt=full gets me: Dynamic Preempt: full Revisions ========= v1: http://lore.kernel.org/r/20211105104035.3112162-1-valentin.schneider@arm.com v1.5: http://lore.kernel.org/r/20211109151057.3489223-1-valentin.schneider@arm.com This v2 is completely different from v1, so I felt like I could get away without writing a version changelog... Cheers, Valentin Valentin Schneider (5): preempt: Restore preemption model selection configs preempt/dynamic: Introduce preempt mode accessors powerpc: Use preemption model accessors kscan: Use preemption model accessors ftrace: Use preemption model accessors for trace header printout arch/powerpc/kernel/interrupt.c | 2 +- arch/powerpc/kernel/traps.c | 2 +- include/linux/kernel.h | 2 +- include/linux/sched.h | 16 +++++++++++++ include/linux/vermagic.h | 2 +- init/Makefile | 2 +- kernel/Kconfig.preempt | 42 ++++++++++++++++----------------- kernel/kcsan/kcsan_test.c | 4 ++-- kernel/sched/core.c | 17 ++++++++++--- kernel/trace/trace.c | 14 ++++------- 10 files changed, 62 insertions(+), 41 deletions(-) -- 2.25.1