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McKenney" , Peter Zijlstra , Rohan McLure , Valentin Schneider , Vincent Guittot , "ndesaulniers@google.com" Subject: [PATCH v4 3/5] powerpc/smp: Add __ro_after_init attribute Date: Thu, 9 Nov 2023 11:19:31 +0530 Message-ID: <20231109054938.26589-4-srikar@linux.vnet.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231109054938.26589-1-srikar@linux.vnet.ibm.com> References: <20231109054938.26589-1-srikar@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: PSDQxOS8L3g2JqApkrUVbOG1x477vcUC X-Proofpoint-ORIG-GUID: ni8jdxWrzvgFhFjKjWh9iEw0rR7Ho9aR X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-09_04,2023-11-08_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 bulkscore=0 impostorscore=0 clxscore=1015 priorityscore=1501 adultscore=0 mlxlogscore=999 malwarescore=0 suspectscore=0 mlxscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311090045 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 1dae4e9ba42d..65a6f988374a 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 2.31.1