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rcu: Remove rsp parameter from rcu_node tree accessor macros

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There now is only one rcu_state structure in a given build of the Linux
kernel, so there is no need to pass it as a parameter to RCU's rcu_node
tree's accessor macros.  This commit therefore removes the rsp parameter
from those macros in kernel/rcu/rcu.h, and removes some now-unused rsp
local variables while in the area.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney
2018-07-04 14:33:59 -07:00
parent 63d4c8c979
commit aedf4ba984
5 changed files with 33 additions and 40 deletions
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18
kernel/rcu/tree_exp.h
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@@ -97,7 +97,7 @@ static void sync_exp_reset_tree_hotplug(void)
* Each pass through the following loop propagates newly onlined
* CPUs for the current rcu_node structure up the rcu_node tree.
*/
rcu_for_each_leaf_node(&rcu_state, rnp) {
rcu_for_each_leaf_node(rnp) {
raw_spin_lock_irqsave_rcu_node(rnp, flags);
if (rnp->expmaskinit == rnp->expmaskinitnext) {
raw_spin_unlock_irqrestore_rcu_node(rnp, flags);
@@ -141,7 +141,7 @@ static void __maybe_unused sync_exp_reset_tree(void)
struct rcu_node *rnp;
sync_exp_reset_tree_hotplug();
rcu_for_each_node_breadth_first(&rcu_state, rnp) {
rcu_for_each_node_breadth_first(rnp) {
raw_spin_lock_irqsave_rcu_node(rnp, flags);
WARN_ON_ONCE(rnp->expmask);
rnp->expmask = rnp->expmaskinit;
@@ -438,14 +438,14 @@ static void sync_rcu_exp_select_cpus(smp_call_func_t func)
trace_rcu_exp_grace_period(rcu_state.name, rcu_exp_gp_seq_endval(), TPS("select"));
/* Schedule work for each leaf rcu_node structure. */
rcu_for_each_leaf_node(&rcu_state, rnp) {
rcu_for_each_leaf_node(rnp) {
rnp->exp_need_flush = false;
if (!READ_ONCE(rnp->expmask))
continue; /* Avoid early boot non-existent wq. */
rnp->rew.rew_func = func;
if (!READ_ONCE(rcu_par_gp_wq) ||
rcu_scheduler_active != RCU_SCHEDULER_RUNNING ||
rcu_is_last_leaf_node(&rcu_state, rnp)) {
rcu_is_last_leaf_node(rnp)) {
/* No workqueues yet or last leaf, do direct call. */
sync_rcu_exp_select_node_cpus(&rnp->rew.rew_work);
continue;
@@ -462,7 +462,7 @@ static void sync_rcu_exp_select_cpus(smp_call_func_t func)
}
/* Wait for workqueue jobs (if any) to complete. */
rcu_for_each_leaf_node(&rcu_state, rnp)
rcu_for_each_leaf_node(rnp)
if (rnp->exp_need_flush)
flush_work(&rnp->rew.rew_work);
}
@@ -496,7 +496,7 @@ static void synchronize_sched_expedited_wait(void)
pr_err("INFO: %s detected expedited stalls on CPUs/tasks: {",
rcu_state.name);
ndetected = 0;
rcu_for_each_leaf_node(&rcu_state, rnp) {
rcu_for_each_leaf_node(rnp) {
ndetected += rcu_print_task_exp_stall(rnp);
for_each_leaf_node_possible_cpu(rnp, cpu) {
struct rcu_data *rdp;
@@ -517,7 +517,7 @@ static void synchronize_sched_expedited_wait(void)
rnp_root->expmask, ".T"[!!rnp_root->exp_tasks]);
if (ndetected) {
pr_err("blocking rcu_node structures:");
rcu_for_each_node_breadth_first(&rcu_state, rnp) {
rcu_for_each_node_breadth_first(rnp) {
if (rnp == rnp_root)
continue; /* printed unconditionally */
if (sync_rcu_preempt_exp_done_unlocked(rnp))
@@ -529,7 +529,7 @@ static void synchronize_sched_expedited_wait(void)
}
pr_cont("\n");
}
rcu_for_each_leaf_node(&rcu_state, rnp) {
rcu_for_each_leaf_node(rnp) {
for_each_leaf_node_possible_cpu(rnp, cpu) {
mask = leaf_node_cpu_bit(rnp, cpu);
if (!(rnp->expmask & mask))
@@ -561,7 +561,7 @@ static void rcu_exp_wait_wake(unsigned long s)
*/
mutex_lock(&rcu_state.exp_wake_mutex);
rcu_for_each_node_breadth_first(&rcu_state, rnp) {
rcu_for_each_node_breadth_first(rnp) {
if (ULONG_CMP_LT(READ_ONCE(rnp->exp_seq_rq), s)) {
spin_lock(&rnp->exp_lock);
/* Recheck, avoid hang in case someone just arrived. */