Rework the initialization operations of some kernel modules

In order to avoid workarounds that check whether a module is ready or
not, break the initialization of some core modules into a bootstrap
step for basic BSP initialization, and a setup step that completes
initialization. Most users only need the bootstrap operation as a
dependency, especially since scheduling isn't enabled yet.

1 files changed, 16 insertions, 9 deletions

diff --git a/kern/rcu.c b/kern/rcu.c
index 82c62df3..0f8bb6ff 100644
--- a/kern/rcu.c
+++ b/kern/rcu.c
@@ -750,11 +750,24 @@ rcu_wait(void)
 }
 
 static int __init
-rcu_setup(void)
+rcu_bootstrap(void)
 {
     rcu_data_init(&rcu_data);
+    rcu_cpu_data_init(cpu_local_ptr(rcu_cpu_data), 0);
+    return 0;
+}
+
+INIT_OP_DEFINE(rcu_bootstrap,
+               INIT_OP_DEP(spinlock_setup, true),
+               INIT_OP_DEP(sref_bootstrap, true),
+               INIT_OP_DEP(syscnt_setup, true),
+               INIT_OP_DEP(thread_bootstrap, true),
+               INIT_OP_DEP(timer_bootstrap, true));
 
-    for (size_t i = 0; i < cpu_count(); i++) {
+static int __init
+rcu_setup(void)
+{
+    for (size_t i = 1; i < cpu_count(); i++) {
         rcu_cpu_data_init(percpu_ptr(rcu_cpu_data, i), i);
     }
 
@@ -762,11 +775,5 @@ rcu_setup(void)
 }
 
 INIT_OP_DEFINE(rcu_setup,
-               INIT_OP_DEP(clock_setup, true),
                INIT_OP_DEP(cpu_mp_probe, true),
-               INIT_OP_DEP(spinlock_setup, true),
-               INIT_OP_DEP(sref_setup, true),
-               INIT_OP_DEP(syscnt_setup, true),
-               INIT_OP_DEP(thread_bootstrap, true),
-               INIT_OP_DEP(timer_setup, true),
-               INIT_OP_DEP(work_setup, true));
+               INIT_OP_DEP(rcu_bootstrap, true));