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rcu: Switch force_qs_rnp() to for_each_leaf_node_cpu_mask()

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Currently, force_qs_rnp() uses a for_each_leaf_node_possible_cpu()
loop containing a check of the current CPU's bit in ->qsmask.
This works, but this commit saves three lines by instead using
for_each_leaf_node_cpu_mask(), which combines the functionality of
for_each_leaf_node_possible_cpu() and leaf_node_cpu_bit().  This commit
also replaces the use of the local variable "bit" with rdp->grpmask.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2019-10-30 09:37:11 -07:00
parent e1350e8e0e
commit 7441e7661d
1 changed files with 5 additions and 8 deletions
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13
kernel/rcu/tree.c
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@ -2298,14 +2298,11 @@ static void force_qs_rnp(int (*f)(struct rcu_data *rdp))
raw_spin_unlock_irqrestore_rcu_node(rnp, flags);
continue;
}
for_each_leaf_node_possible_cpu(rnp, cpu) {
unsigned long bit = leaf_node_cpu_bit(rnp, cpu);
if ((rnp->qsmask & bit) != 0) {
rdp = per_cpu_ptr(&rcu_data, cpu);
if (f(rdp)) {
mask |= bit;
rcu_disable_urgency_upon_qs(rdp);
}
for_each_leaf_node_cpu_mask(rnp, cpu, rnp->qsmask) {
rdp = per_cpu_ptr(&rcu_data, cpu);
if (f(rdp)) {
mask |= rdp->grpmask;
rcu_disable_urgency_upon_qs(rdp);
}
}
if (mask != 0) {