rcu: Move rcu_implicit_dynticks_qs() to ->gp_seq

This commit makes rcu_implicit_dynticks_qs() use ->gp_seq, with the
exception of tracing, which will be converted later.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index de2e2c5..b3af3d2 100644 (file)
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1178,7 +1178,7 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp)
        ruqp = per_cpu_ptr(&rcu_dynticks.rcu_urgent_qs, rdp->cpu);
        if (time_after(jiffies, rdp->rsp->gp_start + jtsq) &&
            READ_ONCE(rdp->rcu_qs_ctr_snap) != per_cpu(rcu_dynticks.rcu_qs_ctr, rdp->cpu) &&
-           READ_ONCE(rdp->gpnum) == rnp->gpnum && !rdp->gpwrap) {
+           rcu_seq_current(&rdp->gp_seq) == rnp->gp_seq && !rdp->gpwrap) {
                trace_rcu_fqs(rdp->rsp->name, rdp->gpnum, rdp->cpu, TPS("rqc"));
                rcu_gpnum_ovf(rnp, rdp);
                return 1;