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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-07-29 17:28:11 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-09-20 21:16:17 -0700
commitf4ecea309d3e17ba5e90082308125ad23bd5701b (patch)
treebf7623bc786bc0c9709a17aac6b459e7b1d21656 /kernel/rcu/tree.c
parent19a5ecde086a6a5287978b12ae948fa691b197b7 (diff)
downloadlinux-sh-f4ecea309d3e17ba5e90082308125ad23bd5701b.tar.gz
rcu: Use rsp->expedited_wq instead of sync_rcu_preempt_exp_wq
Now that there is an ->expedited_wq waitqueue in each rcu_state structure, there is no need for the sync_rcu_preempt_exp_wq global variable. This commit therefore substitutes ->expedited_wq for sync_rcu_preempt_exp_wq. It also initializes ->expedited_wq only once at boot instead of at the start of each expedited grace period. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree.c')
-rw-r--r--kernel/rcu/tree.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 775d36cc0050..53d66ebb4811 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3556,7 +3556,6 @@ void synchronize_sched_expedited(void)
rcu_exp_gp_seq_start(rsp);
/* Stop each CPU that is online, non-idle, and not us. */
- init_waitqueue_head(&rsp->expedited_wq);
atomic_set(&rsp->expedited_need_qs, 1); /* Extra count avoids race. */
for_each_online_cpu(cpu) {
struct rcu_data *rdp = per_cpu_ptr(rsp->rda, cpu);
@@ -4179,6 +4178,7 @@ static void __init rcu_init_one(struct rcu_state *rsp,
}
init_waitqueue_head(&rsp->gp_wq);
+ init_waitqueue_head(&rsp->expedited_wq);
rnp = rsp->level[rcu_num_lvls - 1];
for_each_possible_cpu(i) {
while (i > rnp->grphi)