From nobody Wed Dec 17 11:30:30 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1C60BC4332F for ; Thu, 14 Dec 2023 18:08:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1444134AbjLNSIk (ORCPT ); Thu, 14 Dec 2023 13:08:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53996 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235729AbjLNSI3 (ORCPT ); Thu, 14 Dec 2023 13:08:29 -0500 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 97B7BA6 for ; Thu, 14 Dec 2023 10:08:36 -0800 (PST) Received: from pps.filterd (m0353726.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3BEHlgGm019669; Thu, 14 Dec 2023 18:08:16 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=8au+0nL1pt5CKf9ZgB7sDRFqKE6Qpu8bTuZNpB3Zptk=; b=bkSWeCSynhyAHcZr2YRUKSq7NDnGuuX1fjHcglu979+ngeiOyoQaYak18Jg/vCK4J9h5 BRmO2eWeJ8rxX8JnCyN8UzIBqaBHOdC3unOJbzrcxeJqy/Pd+HbblXJ/I5m8PABWP+kY LQoB3XTIBZy6xPcZCmkce064dJ2rTbsxCb9tomvVQdbPCT4ru9a4kTn91TLVSeIdB3JI jKc8zQuNHJF+HLZrahqQc5KOmOHI4dGVPVkPcSS1VDUFiABE8f6RPumCcKuyPR4OxFMp gf6K0lAKCT7tdpv5I0UhR0hdcIw2Q1Ii1scdqzi7zYHINFLjSOHpDNZl+asKfEJDXX5R Hw== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3v06dt8kbn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 14 Dec 2023 18:08:14 +0000 Received: from m0353726.ppops.net (m0353726.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3BEHwbju027232; Thu, 14 Dec 2023 18:08:14 GMT Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3v06dt8kat-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 14 Dec 2023 18:08:13 +0000 Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3BEHFTVB028201; Thu, 14 Dec 2023 18:08:12 GMT Received: from smtprelay06.fra02v.mail.ibm.com ([9.218.2.230]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3uw2y02mcv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 14 Dec 2023 18:08:12 +0000 Received: from smtpav06.fra02v.mail.ibm.com (smtpav06.fra02v.mail.ibm.com [10.20.54.105]) by smtprelay06.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3BEI8ArB35979746 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 14 Dec 2023 18:08:10 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3BDF82004D; Thu, 14 Dec 2023 18:08:10 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EE2C520049; Thu, 14 Dec 2023 18:08:06 +0000 (GMT) Received: from sapthagiri.in.ibm.com (unknown [9.43.25.55]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 14 Dec 2023 18:08:06 +0000 (GMT) From: Srikar Dronamraju To: Michael Ellerman , Nicholas Piggin , Christophe Leroy Cc: linuxppc-dev , Srikar Dronamraju , Josh Poimboeuf , linux-kernel@vger.kernel.org, Mark Rutland , "Paul E. McKenney" , Peter Zijlstra , Rohan McLure , Valentin Schneider , Vincent Guittot , Aneesh , "ndesaulniers@google.com" Subject: [PATCH v5 3/5] powerpc/smp: Add __ro_after_init attribute Date: Thu, 14 Dec 2023 23:37:13 +0530 Message-ID: <20231214180720.310852-4-srikar@linux.vnet.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231214180720.310852-1-srikar@linux.vnet.ibm.com> References: <20231214180720.310852-1-srikar@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: MHIr5yUDEde61GlGsZ7gwRI-NtUZEVWC X-Proofpoint-ORIG-GUID: g9qjwy0Yi1aamis85_8M0LNRA0iMeVge X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-14_12,2023-12-14_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 malwarescore=0 mlxscore=0 suspectscore=0 bulkscore=0 spamscore=0 phishscore=0 priorityscore=1501 mlxlogscore=999 clxscore=1015 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2312140128 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" There are some variables that are only updated at boot time. So add __ro_after_init attribute to such variables Signed-off-by: Srikar Dronamraju --- Changelog: v2 -> v3: Use __ro_after_init instead of __read_mostly Suggested by : Peter Zijlstra and Michael Ellerman arch/powerpc/kernel/smp.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 2cebc53e97f9..aea149627209 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -77,10 +77,10 @@ static DEFINE_PER_CPU(int, cpu_state) =3D { 0 }; #endif =20 struct task_struct *secondary_current; -bool has_big_cores; -bool coregroup_enabled; -bool thread_group_shares_l2; -bool thread_group_shares_l3; +bool has_big_cores __ro_after_init; +bool coregroup_enabled __ro_after_init; +bool thread_group_shares_l2 __ro_after_init; +bool thread_group_shares_l3 __ro_after_init; =20 DEFINE_PER_CPU(cpumask_var_t, cpu_sibling_map); DEFINE_PER_CPU(cpumask_var_t, cpu_smallcore_map); @@ -987,7 +987,7 @@ static int __init init_thread_group_cache_map(int cpu, = int cache_property) return 0; } =20 -static bool shared_caches; +static bool shared_caches __ro_after_init; =20 #ifdef CONFIG_SCHED_SMT /* cpumask of CPUs with asymmetric SMT dependency */ --=20 2.35.3