*/
struct global_cwq;
+struct worker_pool;
/*
* The poor guys doing the actual heavy lifting. All on-duty workers
struct cpu_workqueue_struct *current_cwq; /* L: current_work's cwq */
struct list_head scheduled; /* L: scheduled works */
struct task_struct *task; /* I: worker task */
- struct global_cwq *gcwq; /* I: the associated gcwq */
+ struct worker_pool *pool; /* I: the associated pool */
/* 64 bytes boundary on 64bit, 32 on 32bit */
unsigned long last_active; /* L: last active timestamp */
unsigned int flags; /* X: flags */
struct work_struct rebind_work; /* L: rebind worker to cpu */
};
+struct worker_pool {
+ struct global_cwq *gcwq; /* I: the owning gcwq */
+
+ struct list_head worklist; /* L: list of pending works */
+ int nr_workers; /* L: total number of workers */
+ int nr_idle; /* L: currently idle ones */
+
+ struct list_head idle_list; /* X: list of idle workers */
+ struct timer_list idle_timer; /* L: worker idle timeout */
+ struct timer_list mayday_timer; /* L: SOS timer for workers */
+
+ struct ida worker_ida; /* L: for worker IDs */
+ struct worker *first_idle; /* L: first idle worker */
+};
+
/*
* Global per-cpu workqueue. There's one and only one for each cpu
* and all works are queued and processed here regardless of their
*/
struct global_cwq {
spinlock_t lock; /* the gcwq lock */
- struct list_head worklist; /* L: list of pending works */
unsigned int cpu; /* I: the associated cpu */
unsigned int flags; /* L: GCWQ_* flags */
- int nr_workers; /* L: total number of workers */
- int nr_idle; /* L: currently idle ones */
-
- /* workers are chained either in the idle_list or busy_hash */
- struct list_head idle_list; /* X: list of idle workers */
+ /* workers are chained either in busy_hash or pool idle_list */
struct hlist_head busy_hash[BUSY_WORKER_HASH_SIZE];
/* L: hash of busy workers */
- struct timer_list idle_timer; /* L: worker idle timeout */
- struct timer_list mayday_timer; /* L: SOS timer for dworkers */
-
- struct ida worker_ida; /* L: for worker IDs */
+ struct worker_pool pool; /* the worker pools */
struct task_struct *trustee; /* L: for gcwq shutdown */
unsigned int trustee_state; /* L: trustee state */
wait_queue_head_t trustee_wait; /* trustee wait */
- struct worker *first_idle; /* L: first idle worker */
} ____cacheline_aligned_in_smp;
/*
* aligned at two's power of the number of flag bits.
*/
struct cpu_workqueue_struct {
- struct global_cwq *gcwq; /* I: the associated gcwq */
+ struct worker_pool *pool; /* I: the associated pool */
struct workqueue_struct *wq; /* I: the owning workqueue */
int work_color; /* L: current color */
int flush_color; /* L: flushing color */
if (data & WORK_STRUCT_CWQ)
return ((struct cpu_workqueue_struct *)
- (data & WORK_STRUCT_WQ_DATA_MASK))->gcwq;
+ (data & WORK_STRUCT_WQ_DATA_MASK))->pool->gcwq;
cpu = data >> WORK_STRUCT_FLAG_BITS;
if (cpu == WORK_CPU_NONE)
*/
static bool need_more_worker(struct global_cwq *gcwq)
{
- return !list_empty(&gcwq->worklist) && __need_more_worker(gcwq);
+ return !list_empty(&gcwq->pool.worklist) && __need_more_worker(gcwq);
}
/* Can I start working? Called from busy but !running workers. */
static bool may_start_working(struct global_cwq *gcwq)
{
- return gcwq->nr_idle;
+ return gcwq->pool.nr_idle;
}
/* Do I need to keep working? Called from currently running workers. */
{
atomic_t *nr_running = get_gcwq_nr_running(gcwq->cpu);
- return !list_empty(&gcwq->worklist) &&
+ return !list_empty(&gcwq->pool.worklist) &&
(atomic_read(nr_running) <= 1 ||
gcwq->flags & GCWQ_HIGHPRI_PENDING);
}
static bool too_many_workers(struct global_cwq *gcwq)
{
bool managing = gcwq->flags & GCWQ_MANAGING_WORKERS;
- int nr_idle = gcwq->nr_idle + managing; /* manager is considered idle */
- int nr_busy = gcwq->nr_workers - nr_idle;
+ int nr_idle = gcwq->pool.nr_idle + managing; /* manager is considered idle */
+ int nr_busy = gcwq->pool.nr_workers - nr_idle;
return nr_idle > 2 && (nr_idle - 2) * MAX_IDLE_WORKERS_RATIO >= nr_busy;
}
/* Return the first worker. Safe with preemption disabled */
static struct worker *first_worker(struct global_cwq *gcwq)
{
- if (unlikely(list_empty(&gcwq->idle_list)))
+ if (unlikely(list_empty(&gcwq->pool.idle_list)))
return NULL;
- return list_first_entry(&gcwq->idle_list, struct worker, entry);
+ return list_first_entry(&gcwq->pool.idle_list, struct worker, entry);
}
/**
unsigned int cpu)
{
struct worker *worker = kthread_data(task), *to_wakeup = NULL;
- struct global_cwq *gcwq = get_gcwq(cpu);
+ struct worker_pool *pool = worker->pool;
+ struct global_cwq *gcwq = pool->gcwq;
atomic_t *nr_running = get_gcwq_nr_running(cpu);
if (worker->flags & WORKER_NOT_RUNNING)
* could be manipulating idle_list, so dereferencing idle_list
* without gcwq lock is safe.
*/
- if (atomic_dec_and_test(nr_running) && !list_empty(&gcwq->worklist))
+ if (atomic_dec_and_test(nr_running) && !list_empty(&pool->worklist))
to_wakeup = first_worker(gcwq);
return to_wakeup ? to_wakeup->task : NULL;
}
static inline void worker_set_flags(struct worker *worker, unsigned int flags,
bool wakeup)
{
- struct global_cwq *gcwq = worker->gcwq;
+ struct worker_pool *pool = worker->pool;
+ struct global_cwq *gcwq = pool->gcwq;
WARN_ON_ONCE(worker->task != current);
if (wakeup) {
if (atomic_dec_and_test(nr_running) &&
- !list_empty(&gcwq->worklist))
+ !list_empty(&pool->worklist))
wake_up_worker(gcwq);
} else
atomic_dec(nr_running);
*/
static inline void worker_clr_flags(struct worker *worker, unsigned int flags)
{
- struct global_cwq *gcwq = worker->gcwq;
+ struct global_cwq *gcwq = worker->pool->gcwq;
unsigned int oflags = worker->flags;
WARN_ON_ONCE(worker->task != current);
struct work_struct *twork;
if (likely(!(cwq->wq->flags & WQ_HIGHPRI)))
- return &gcwq->worklist;
+ return &gcwq->pool.worklist;
- list_for_each_entry(twork, &gcwq->worklist, entry) {
+ list_for_each_entry(twork, &gcwq->pool.worklist, entry) {
struct cpu_workqueue_struct *tcwq = get_work_cwq(twork);
if (!(tcwq->wq->flags & WQ_HIGHPRI))
struct work_struct *work, struct list_head *head,
unsigned int extra_flags)
{
- struct global_cwq *gcwq = cwq->gcwq;
+ struct global_cwq *gcwq = cwq->pool->gcwq;
/* we own @work, set data and link */
set_work_cwq(work, cwq, extra_flags);
*/
static void worker_enter_idle(struct worker *worker)
{
- struct global_cwq *gcwq = worker->gcwq;
+ struct worker_pool *pool = worker->pool;
+ struct global_cwq *gcwq = pool->gcwq;
BUG_ON(worker->flags & WORKER_IDLE);
BUG_ON(!list_empty(&worker->entry) &&
/* can't use worker_set_flags(), also called from start_worker() */
worker->flags |= WORKER_IDLE;
- gcwq->nr_idle++;
+ pool->nr_idle++;
worker->last_active = jiffies;
/* idle_list is LIFO */
- list_add(&worker->entry, &gcwq->idle_list);
+ list_add(&worker->entry, &pool->idle_list);
if (likely(!(worker->flags & WORKER_ROGUE))) {
- if (too_many_workers(gcwq) && !timer_pending(&gcwq->idle_timer))
- mod_timer(&gcwq->idle_timer,
+ if (too_many_workers(gcwq) && !timer_pending(&pool->idle_timer))
+ mod_timer(&pool->idle_timer,
jiffies + IDLE_WORKER_TIMEOUT);
} else
wake_up_all(&gcwq->trustee_wait);
* warning may trigger spuriously. Check iff trustee is idle.
*/
WARN_ON_ONCE(gcwq->trustee_state == TRUSTEE_DONE &&
- gcwq->nr_workers == gcwq->nr_idle &&
+ pool->nr_workers == pool->nr_idle &&
atomic_read(get_gcwq_nr_running(gcwq->cpu)));
}
*/
static void worker_leave_idle(struct worker *worker)
{
- struct global_cwq *gcwq = worker->gcwq;
+ struct worker_pool *pool = worker->pool;
BUG_ON(!(worker->flags & WORKER_IDLE));
worker_clr_flags(worker, WORKER_IDLE);
- gcwq->nr_idle--;
+ pool->nr_idle--;
list_del_init(&worker->entry);
}
static bool worker_maybe_bind_and_lock(struct worker *worker)
__acquires(&gcwq->lock)
{
- struct global_cwq *gcwq = worker->gcwq;
+ struct global_cwq *gcwq = worker->pool->gcwq;
struct task_struct *task = worker->task;
while (true) {
static void worker_rebind_fn(struct work_struct *work)
{
struct worker *worker = container_of(work, struct worker, rebind_work);
- struct global_cwq *gcwq = worker->gcwq;
+ struct global_cwq *gcwq = worker->pool->gcwq;
if (worker_maybe_bind_and_lock(worker))
worker_clr_flags(worker, WORKER_REBIND);
static struct worker *create_worker(struct global_cwq *gcwq, bool bind)
{
bool on_unbound_cpu = gcwq->cpu == WORK_CPU_UNBOUND;
+ struct worker_pool *pool = &gcwq->pool;
struct worker *worker = NULL;
int id = -1;
spin_lock_irq(&gcwq->lock);
- while (ida_get_new(&gcwq->worker_ida, &id)) {
+ while (ida_get_new(&pool->worker_ida, &id)) {
spin_unlock_irq(&gcwq->lock);
- if (!ida_pre_get(&gcwq->worker_ida, GFP_KERNEL))
+ if (!ida_pre_get(&pool->worker_ida, GFP_KERNEL))
goto fail;
spin_lock_irq(&gcwq->lock);
}
if (!worker)
goto fail;
- worker->gcwq = gcwq;
+ worker->pool = pool;
worker->id = id;
if (!on_unbound_cpu)
fail:
if (id >= 0) {
spin_lock_irq(&gcwq->lock);
- ida_remove(&gcwq->worker_ida, id);
+ ida_remove(&pool->worker_ida, id);
spin_unlock_irq(&gcwq->lock);
}
kfree(worker);
static void start_worker(struct worker *worker)
{
worker->flags |= WORKER_STARTED;
- worker->gcwq->nr_workers++;
+ worker->pool->nr_workers++;
worker_enter_idle(worker);
wake_up_process(worker->task);
}
*/
static void destroy_worker(struct worker *worker)
{
- struct global_cwq *gcwq = worker->gcwq;
+ struct worker_pool *pool = worker->pool;
+ struct global_cwq *gcwq = pool->gcwq;
int id = worker->id;
/* sanity check frenzy */
BUG_ON(!list_empty(&worker->scheduled));
if (worker->flags & WORKER_STARTED)
- gcwq->nr_workers--;
+ pool->nr_workers--;
if (worker->flags & WORKER_IDLE)
- gcwq->nr_idle--;
+ pool->nr_idle--;
list_del_init(&worker->entry);
worker->flags |= WORKER_DIE;
kfree(worker);
spin_lock_irq(&gcwq->lock);
- ida_remove(&gcwq->worker_ida, id);
+ ida_remove(&pool->worker_ida, id);
}
static void idle_worker_timeout(unsigned long __gcwq)
unsigned long expires;
/* idle_list is kept in LIFO order, check the last one */
- worker = list_entry(gcwq->idle_list.prev, struct worker, entry);
+ worker = list_entry(gcwq->pool.idle_list.prev, struct worker,
+ entry);
expires = worker->last_active + IDLE_WORKER_TIMEOUT;
if (time_before(jiffies, expires))
- mod_timer(&gcwq->idle_timer, expires);
+ mod_timer(&gcwq->pool.idle_timer, expires);
else {
/* it's been idle for too long, wake up manager */
gcwq->flags |= GCWQ_MANAGE_WORKERS;
return false;
/* mayday mayday mayday */
- cpu = cwq->gcwq->cpu;
+ cpu = cwq->pool->gcwq->cpu;
/* WORK_CPU_UNBOUND can't be set in cpumask, use cpu 0 instead */
if (cpu == WORK_CPU_UNBOUND)
cpu = 0;
* allocation deadlock. Send distress signals to
* rescuers.
*/
- list_for_each_entry(work, &gcwq->worklist, entry)
+ list_for_each_entry(work, &gcwq->pool.worklist, entry)
send_mayday(work);
}
spin_unlock_irq(&gcwq->lock);
- mod_timer(&gcwq->mayday_timer, jiffies + MAYDAY_INTERVAL);
+ mod_timer(&gcwq->pool.mayday_timer, jiffies + MAYDAY_INTERVAL);
}
/**
spin_unlock_irq(&gcwq->lock);
/* if we don't make progress in MAYDAY_INITIAL_TIMEOUT, call for help */
- mod_timer(&gcwq->mayday_timer, jiffies + MAYDAY_INITIAL_TIMEOUT);
+ mod_timer(&gcwq->pool.mayday_timer, jiffies + MAYDAY_INITIAL_TIMEOUT);
while (true) {
struct worker *worker;
worker = create_worker(gcwq, true);
if (worker) {
- del_timer_sync(&gcwq->mayday_timer);
+ del_timer_sync(&gcwq->pool.mayday_timer);
spin_lock_irq(&gcwq->lock);
start_worker(worker);
BUG_ON(need_to_create_worker(gcwq));
break;
}
- del_timer_sync(&gcwq->mayday_timer);
+ del_timer_sync(&gcwq->pool.mayday_timer);
spin_lock_irq(&gcwq->lock);
if (need_to_create_worker(gcwq))
goto restart;
struct worker *worker;
unsigned long expires;
- worker = list_entry(gcwq->idle_list.prev, struct worker, entry);
+ worker = list_entry(gcwq->pool.idle_list.prev, struct worker,
+ entry);
expires = worker->last_active + IDLE_WORKER_TIMEOUT;
if (time_before(jiffies, expires)) {
- mod_timer(&gcwq->idle_timer, expires);
+ mod_timer(&gcwq->pool.idle_timer, expires);
break;
}
*/
static bool manage_workers(struct worker *worker)
{
- struct global_cwq *gcwq = worker->gcwq;
+ struct global_cwq *gcwq = worker->pool->gcwq;
bool ret = false;
if (gcwq->flags & GCWQ_MANAGING_WORKERS)
{
struct work_struct *work = list_first_entry(&cwq->delayed_works,
struct work_struct, entry);
- struct list_head *pos = gcwq_determine_ins_pos(cwq->gcwq, cwq);
+ struct list_head *pos = gcwq_determine_ins_pos(cwq->pool->gcwq, cwq);
trace_workqueue_activate_work(work);
move_linked_works(work, pos, NULL);
__acquires(&gcwq->lock)
{
struct cpu_workqueue_struct *cwq = get_work_cwq(work);
- struct global_cwq *gcwq = cwq->gcwq;
+ struct worker_pool *pool = worker->pool;
+ struct global_cwq *gcwq = pool->gcwq;
struct hlist_head *bwh = busy_worker_head(gcwq, work);
bool cpu_intensive = cwq->wq->flags & WQ_CPU_INTENSIVE;
work_func_t f = work->func;
* wake up another worker; otherwise, clear HIGHPRI_PENDING.
*/
if (unlikely(gcwq->flags & GCWQ_HIGHPRI_PENDING)) {
- struct work_struct *nwork = list_first_entry(&gcwq->worklist,
- struct work_struct, entry);
+ struct work_struct *nwork = list_first_entry(&pool->worklist,
+ struct work_struct, entry);
- if (!list_empty(&gcwq->worklist) &&
+ if (!list_empty(&pool->worklist) &&
get_work_cwq(nwork)->wq->flags & WQ_HIGHPRI)
wake_up_worker(gcwq);
else
static int worker_thread(void *__worker)
{
struct worker *worker = __worker;
- struct global_cwq *gcwq = worker->gcwq;
+ struct worker_pool *pool = worker->pool;
+ struct global_cwq *gcwq = pool->gcwq;
/* tell the scheduler that this is a workqueue worker */
worker->task->flags |= PF_WQ_WORKER;
do {
struct work_struct *work =
- list_first_entry(&gcwq->worklist,
+ list_first_entry(&pool->worklist,
struct work_struct, entry);
if (likely(!(*work_data_bits(work) & WORK_STRUCT_LINKED))) {
for_each_mayday_cpu(cpu, wq->mayday_mask) {
unsigned int tcpu = is_unbound ? WORK_CPU_UNBOUND : cpu;
struct cpu_workqueue_struct *cwq = get_cwq(tcpu, wq);
- struct global_cwq *gcwq = cwq->gcwq;
+ struct worker_pool *pool = cwq->pool;
+ struct global_cwq *gcwq = pool->gcwq;
struct work_struct *work, *n;
__set_current_state(TASK_RUNNING);
mayday_clear_cpu(cpu, wq->mayday_mask);
/* migrate to the target cpu if possible */
- rescuer->gcwq = gcwq;
+ rescuer->pool = pool;
worker_maybe_bind_and_lock(rescuer);
/*
* process'em.
*/
BUG_ON(!list_empty(&rescuer->scheduled));
- list_for_each_entry_safe(work, n, &gcwq->worklist, entry)
+ list_for_each_entry_safe(work, n, &pool->worklist, entry)
if (get_work_cwq(work) == cwq)
move_linked_works(work, scheduled, &n);
for_each_cwq_cpu(cpu, wq) {
struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
- struct global_cwq *gcwq = cwq->gcwq;
+ struct global_cwq *gcwq = cwq->pool->gcwq;
spin_lock_irq(&gcwq->lock);
struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
bool drained;
- spin_lock_irq(&cwq->gcwq->lock);
+ spin_lock_irq(&cwq->pool->gcwq->lock);
drained = !cwq->nr_active && list_empty(&cwq->delayed_works);
- spin_unlock_irq(&cwq->gcwq->lock);
+ spin_unlock_irq(&cwq->pool->gcwq->lock);
if (drained)
continue;
*/
smp_rmb();
cwq = get_work_cwq(work);
- if (unlikely(!cwq || gcwq != cwq->gcwq))
+ if (unlikely(!cwq || gcwq != cwq->pool->gcwq))
goto already_gone;
} else if (wait_executing) {
worker = find_worker_executing_work(gcwq, work);
struct global_cwq *gcwq = get_gcwq(cpu);
BUG_ON((unsigned long)cwq & WORK_STRUCT_FLAG_MASK);
- cwq->gcwq = gcwq;
+ cwq->pool = &gcwq->pool;
cwq->wq = wq;
cwq->flush_color = -1;
cwq->max_active = max_active;
gcwq->flags |= GCWQ_MANAGING_WORKERS;
- list_for_each_entry(worker, &gcwq->idle_list, entry)
+ list_for_each_entry(worker, &gcwq->pool.idle_list, entry)
worker->flags |= WORKER_ROGUE;
for_each_busy_worker(worker, i, pos, gcwq)
atomic_set(get_gcwq_nr_running(gcwq->cpu), 0);
spin_unlock_irq(&gcwq->lock);
- del_timer_sync(&gcwq->idle_timer);
+ del_timer_sync(&gcwq->pool.idle_timer);
spin_lock_irq(&gcwq->lock);
/*
* may be frozen works in freezable cwqs. Don't declare
* completion while frozen.
*/
- while (gcwq->nr_workers != gcwq->nr_idle ||
+ while (gcwq->pool.nr_workers != gcwq->pool.nr_idle ||
gcwq->flags & GCWQ_FREEZING ||
gcwq->trustee_state == TRUSTEE_IN_CHARGE) {
int nr_works = 0;
- list_for_each_entry(work, &gcwq->worklist, entry) {
+ list_for_each_entry(work, &gcwq->pool.worklist, entry) {
send_mayday(work);
nr_works++;
}
- list_for_each_entry(worker, &gcwq->idle_list, entry) {
+ list_for_each_entry(worker, &gcwq->pool.idle_list, entry) {
if (!nr_works--)
break;
wake_up_process(worker->task);
* all workers till we're canceled.
*/
do {
- rc = trustee_wait_event(!list_empty(&gcwq->idle_list));
- while (!list_empty(&gcwq->idle_list))
- destroy_worker(list_first_entry(&gcwq->idle_list,
+ rc = trustee_wait_event(!list_empty(&gcwq->pool.idle_list));
+ while (!list_empty(&gcwq->pool.idle_list))
+ destroy_worker(list_first_entry(&gcwq->pool.idle_list,
struct worker, entry));
- } while (gcwq->nr_workers && rc >= 0);
+ } while (gcwq->pool.nr_workers && rc >= 0);
/*
* At this point, either draining has completed and no worker
* Tell the remaining busy ones to rebind once it finishes the
* currently scheduled works by scheduling the rebind_work.
*/
- WARN_ON(!list_empty(&gcwq->idle_list));
+ WARN_ON(!list_empty(&gcwq->pool.idle_list));
for_each_busy_worker(worker, i, pos, gcwq) {
struct work_struct *rebind_work = &worker->rebind_work;
kthread_bind(new_trustee, cpu);
/* fall through */
case CPU_UP_PREPARE:
- BUG_ON(gcwq->first_idle);
+ BUG_ON(gcwq->pool.first_idle);
new_worker = create_worker(gcwq, false);
if (!new_worker) {
if (new_trustee)
wait_trustee_state(gcwq, TRUSTEE_IN_CHARGE);
/* fall through */
case CPU_UP_PREPARE:
- BUG_ON(gcwq->first_idle);
- gcwq->first_idle = new_worker;
+ BUG_ON(gcwq->pool.first_idle);
+ gcwq->pool.first_idle = new_worker;
break;
case CPU_DYING:
gcwq->trustee_state = TRUSTEE_BUTCHER;
/* fall through */
case CPU_UP_CANCELED:
- destroy_worker(gcwq->first_idle);
- gcwq->first_idle = NULL;
+ destroy_worker(gcwq->pool.first_idle);
+ gcwq->pool.first_idle = NULL;
break;
case CPU_DOWN_FAILED:
* take a look.
*/
spin_unlock_irq(&gcwq->lock);
- kthread_bind(gcwq->first_idle->task, cpu);
+ kthread_bind(gcwq->pool.first_idle->task, cpu);
spin_lock_irq(&gcwq->lock);
gcwq->flags |= GCWQ_MANAGE_WORKERS;
- start_worker(gcwq->first_idle);
- gcwq->first_idle = NULL;
+ start_worker(gcwq->pool.first_idle);
+ gcwq->pool.first_idle = NULL;
break;
}
struct global_cwq *gcwq = get_gcwq(cpu);
spin_lock_init(&gcwq->lock);
- INIT_LIST_HEAD(&gcwq->worklist);
+ gcwq->pool.gcwq = gcwq;
+ INIT_LIST_HEAD(&gcwq->pool.worklist);
gcwq->cpu = cpu;
gcwq->flags |= GCWQ_DISASSOCIATED;
- INIT_LIST_HEAD(&gcwq->idle_list);
+ INIT_LIST_HEAD(&gcwq->pool.idle_list);
for (i = 0; i < BUSY_WORKER_HASH_SIZE; i++)
INIT_HLIST_HEAD(&gcwq->busy_hash[i]);
- init_timer_deferrable(&gcwq->idle_timer);
- gcwq->idle_timer.function = idle_worker_timeout;
- gcwq->idle_timer.data = (unsigned long)gcwq;
+ init_timer_deferrable(&gcwq->pool.idle_timer);
+ gcwq->pool.idle_timer.function = idle_worker_timeout;
+ gcwq->pool.idle_timer.data = (unsigned long)gcwq;
- setup_timer(&gcwq->mayday_timer, gcwq_mayday_timeout,
+ setup_timer(&gcwq->pool.mayday_timer, gcwq_mayday_timeout,
(unsigned long)gcwq);
- ida_init(&gcwq->worker_ida);
+ ida_init(&gcwq->pool.worker_ida);
gcwq->trustee_state = TRUSTEE_DONE;
init_waitqueue_head(&gcwq->trustee_wait);
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