mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 11:49:32 +00:00
rcu: Assume rcu_init() is called before smp
The rcu_init() function is called way before SMP is initialized and therefore only the boot CPU should be online at this stage. Simplify the boot per-cpu initialization accordingly. Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com> Cc: Uladzislau Rezki <uladzislau.rezki@sony.com> Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
parent
8d2aaa9b7c
commit
2eed973adc
1 changed files with 5 additions and 6 deletions
|
@ -4782,7 +4782,7 @@ static void __init kfree_rcu_batch_init(void)
|
|||
|
||||
void __init rcu_init(void)
|
||||
{
|
||||
int cpu;
|
||||
int cpu = smp_processor_id();
|
||||
|
||||
rcu_early_boot_tests();
|
||||
|
||||
|
@ -4802,11 +4802,10 @@ void __init rcu_init(void)
|
|||
* or the scheduler are operational.
|
||||
*/
|
||||
pm_notifier(rcu_pm_notify, 0);
|
||||
for_each_online_cpu(cpu) {
|
||||
rcutree_prepare_cpu(cpu);
|
||||
rcu_cpu_starting(cpu);
|
||||
rcutree_online_cpu(cpu);
|
||||
}
|
||||
WARN_ON(num_online_cpus() > 1); // Only one CPU this early in boot.
|
||||
rcutree_prepare_cpu(cpu);
|
||||
rcu_cpu_starting(cpu);
|
||||
rcutree_online_cpu(cpu);
|
||||
|
||||
/* Create workqueue for Tree SRCU and for expedited GPs. */
|
||||
rcu_gp_wq = alloc_workqueue("rcu_gp", WQ_MEM_RECLAIM, 0);
|
||||
|
|
Loading…
Reference in a new issue