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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-12-17 18:25:59 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-01-06 11:02:54 -0800
commitab954c167ed9ac107a8beb1d6e1745ae698a3421 (patch)
treec4bd8ceba2369b72d3c1b1ef3b7fa81dcf5cfc3f
parentrcu: Don't scan root rcu_node structure for stalled tasks (diff)
downloadlinux-dev-ab954c167ed9ac107a8beb1d6e1745ae698a3421.tar.xz
linux-dev-ab954c167ed9ac107a8beb1d6e1745ae698a3421.zip
rcu: Remove redundant callback-list initialization
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>
-rw-r--r--kernel/rcu/tree.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 4ed2c2842103..febd0f72a3c9 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -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. */
raw_spin_lock_irqsave(&rnp->lock, flags);
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);
WARN_ON_ONCE(rdp->dynticks->dynticks_nesting != DYNTICK_TASK_EXIT_IDLE);
WARN_ON_ONCE(atomic_read(&rdp->dynticks->dynticks) != 1);