From: Paul E. McKenney Date: Sat, 28 Apr 2018 03:51:36 +0000 (-0700) Subject: rcu: Move rcu_nocb_gp_get() to ->gp_seq X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e0da2374c3881cb9a512e2718f9ca655a48de9db;p=linux.git rcu: Move rcu_nocb_gp_get() to ->gp_seq This commit makes rcu_try_advance_all_cbs() use ->gp_seq. It uses rcu_seq_ctr() in order to shift away the state bits, so that the low-order bits of the result may safely be used to index ->nocb_gp_wq[]. Signed-off-by: Paul E. McKenney --- diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index d893899b72f49..5b10904669c57 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -1852,7 +1852,7 @@ static void rcu_nocb_gp_cleanup(struct swait_queue_head *sq) static struct swait_queue_head *rcu_nocb_gp_get(struct rcu_node *rnp) { - return &rnp->nocb_gp_wq[rnp->completed & 0x1]; + return &rnp->nocb_gp_wq[rcu_seq_ctr(rnp->gp_seq) & 0x1]; } static void rcu_init_one_nocb(struct rcu_node *rnp)