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[v5,3/5] powerpc/smp: Add __ro_after_init attribute

Message ID 20231214180720.310852-4-srikar@linux.vnet.ibm.com (mailing list archive)
State Accepted
Commit fd535a858ebeb1f478b1d065b6c057f52aad483a
Headers show
Series powerpc/smp: Topology and shared processor optimizations | expand

Commit Message

Srikar Dronamraju Dec. 14, 2023, 6:07 p.m. UTC 
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 <srikar@linux.vnet.ibm.com>
---
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(-)
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Patch

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) = { 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;
 
 #ifdef CONFIG_SCHED_SMT
 /* cpumask of CPUs with asymmetric SMT dependency */