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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 <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-04-27 20:51:36 -07:00
parent 03c8cb765a
commit e0da2374c3
1 changed files with 1 additions and 1 deletions
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2
kernel/rcu/tree_plugin.h
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@ -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) 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) static void rcu_init_one_nocb(struct rcu_node *rnp)