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Thu, 26 Oct 2023 10:19:40 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9E1C320063; Thu, 26 Oct 2023 10:19:38 +0000 (GMT) Received: from sapthagiri.in.ibm.com (unknown [9.109.198.113]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 26 Oct 2023 10:19:38 +0000 (GMT) From: Srikar Dronamraju To: Michael Ellerman , Nicholas Piggin , Christophe Leroy Subject: [PATCH v3 3/5] powerpc/smp: Add __ro_after_init attribute Date: Thu, 26 Oct 2023 15:48:38 +0530 Message-ID: <20231026101843.56784-4-srikar@linux.vnet.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231026101843.56784-1-srikar@linux.vnet.ibm.com> References: <20231026101843.56784-1-srikar@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: HEbHgCpkSz1qK7sff_3Gmr6F1XGUNHWo X-Proofpoint-ORIG-GUID: f6quz0pZ4Pb_BBM3nfDVJI37scPTPy8w X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-26_08,2023-10-25_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 clxscore=1015 bulkscore=0 malwarescore=0 spamscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310170001 definitions=main-2310260087 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: Mark Rutland , Valentin Schneider , Srikar Dronamraju , "Paul E. McKenney" , "Peter Zijlstra \(Intel\)" , "ndesaulniers@google.com" , linux-kernel@vger.kernel.org, Rohan McLure , linuxppc-dev , Josh Poimboeuf Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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 9fda012d9eca..27770f7f1ae5 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -77,10 +77,10 @@ static DEFINE_PER_CPU(int, cpu_state) = { 0 }; #endif 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; 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; } -static bool shared_caches; +static bool shared_caches __ro_after_init; /* * On shared processor LPARs scheduled on a big core (which has two or more * independent thread groups per core), then prefer lower numbered CPUs, so