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rcu: Remove redundant callback-list initialization

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The RCU callback lists are initialized in both rcu_boot_init_percpu_data()
and rcu_init_percpu_data().  The former is intended for initializing
immutable data, so this commit removes the initialization from
rcu_boot_init_percpu_data() and leaves it in rcu_init_percpu_data().
This change prepares for permitting callbacks to be queued very early
in boot.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2014-12-17 18:25:59 -08:00
parent 6cd534ef8b
commit ab954c167e
1 changed files with 0 additions and 3 deletions
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3
kernel/rcu/tree.c
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@ -3419,9 +3419,6 @@ rcu_boot_init_percpu_data(int cpu, struct rcu_state *rsp)
/* Set up local state, ensuring consistent view of global state. */ /* Set up local state, ensuring consistent view of global state. */
raw_spin_lock_irqsave(&rnp->lock, flags); raw_spin_lock_irqsave(&rnp->lock, flags);
rdp->grpmask = 1UL << (cpu - rdp->mynode->grplo); rdp->grpmask = 1UL << (cpu - rdp->mynode->grplo);
init_callback_list(rdp);
rdp->qlen_lazy = 0;
ACCESS_ONCE(rdp->qlen) = 0;
rdp->dynticks = &per_cpu(rcu_dynticks, cpu); rdp->dynticks = &per_cpu(rcu_dynticks, cpu);
WARN_ON_ONCE(rdp->dynticks->dynticks_nesting != DYNTICK_TASK_EXIT_IDLE); WARN_ON_ONCE(rdp->dynticks->dynticks_nesting != DYNTICK_TASK_EXIT_IDLE);
WARN_ON_ONCE(atomic_read(&rdp->dynticks->dynticks) != 1); WARN_ON_ONCE(atomic_read(&rdp->dynticks->dynticks) != 1);