From: Paul E. McKenney Date: Thu, 18 Dec 2014 02:25:59 +0000 (-0800) Subject: rcu: Remove redundant callback-list initialization X-Git-Tag: v4.14-rc1~5883^2^2~1^3 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ab954c167ed9ac107a8beb1d6e1745ae698a3421;p=platform%2Fkernel%2Flinux-rpi.git 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 --- diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 4ed2c28..febd0f7 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);