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rcu: Add destroy_work_on_stack() to match INIT_WORK_ONSTACK()

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The synchronize_rcu_expedited() function has an INIT_WORK_ONSTACK(),
but lacks the corresponding destroy_work_on_stack().  This commit
therefore adds destroy_work_on_stack().

Reported-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
This commit is contained in:
Paul E. McKenney 2019-06-19 15:42:51 -07:00
parent cdc694b235
commit fbad01af8c
1 changed files with 5 additions and 1 deletions
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6
kernel/rcu/tree_exp.h
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@ -792,6 +792,7 @@ static int rcu_print_task_exp_stall(struct rcu_node *rnp)
*/
void synchronize_rcu_expedited(void)
{
bool boottime = (rcu_scheduler_active == RCU_SCHEDULER_INIT);
struct rcu_exp_work rew;
struct rcu_node *rnp;
unsigned long s;
@ -817,7 +818,7 @@ void synchronize_rcu_expedited(void)
return; /* Someone else did our work for us. */
/* Ensure that load happens before action based on it. */
if (unlikely(rcu_scheduler_active == RCU_SCHEDULER_INIT)) {
if (unlikely(boottime)) {
/* Direct call during scheduler init and early_initcalls(). */
rcu_exp_sel_wait_wake(s);
} else {
@ -835,5 +836,8 @@ void synchronize_rcu_expedited(void)
/* Let the next expedited grace period start. */
mutex_unlock(&rcu_state.exp_mutex);
if (likely(!boottime))
destroy_work_on_stack(&rew.rew_work);
}
EXPORT_SYMBOL_GPL(synchronize_rcu_expedited);