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-rw-r--r--kernel/workqueue.c37
1 files changed, 22 insertions, 15 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 7ea75529eabb..aa520e715bbc 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -2843,7 +2843,8 @@ reflush:
}
EXPORT_SYMBOL_GPL(drain_workqueue);
-static bool start_flush_work(struct work_struct *work, struct wq_barrier *barr)
+static bool start_flush_work(struct work_struct *work, struct wq_barrier *barr,
+ bool from_cancel)
{
struct worker *worker = NULL;
struct worker_pool *pool;
@@ -2885,7 +2886,8 @@ static bool start_flush_work(struct work_struct *work, struct wq_barrier *barr)
* workqueues the deadlock happens when the rescuer stalls, blocking
* forward progress.
*/
- if (pwq->wq->saved_max_active == 1 || pwq->wq->rescuer) {
+ if (!from_cancel &&
+ (pwq->wq->saved_max_active == 1 || pwq->wq->rescuer)) {
lock_map_acquire(&pwq->wq->lockdep_map);
lock_map_release(&pwq->wq->lockdep_map);
}
@@ -2896,6 +2898,22 @@ already_gone:
return false;
}
+static bool __flush_work(struct work_struct *work, bool from_cancel)
+{
+ struct wq_barrier barr;
+
+ if (WARN_ON(!wq_online))
+ return false;
+
+ if (start_flush_work(work, &barr, from_cancel)) {
+ wait_for_completion(&barr.done);
+ destroy_work_on_stack(&barr.work);
+ return true;
+ } else {
+ return false;
+ }
+}
+
/**
* flush_work - wait for a work to finish executing the last queueing instance
* @work: the work to flush
@@ -2909,18 +2927,7 @@ already_gone:
*/
bool flush_work(struct work_struct *work)
{
- struct wq_barrier barr;
-
- if (WARN_ON(!wq_online))
- return false;
-
- if (start_flush_work(work, &barr)) {
- wait_for_completion(&barr.done);
- destroy_work_on_stack(&barr.work);
- return true;
- } else {
- return false;
- }
+ return __flush_work(work, false);
}
EXPORT_SYMBOL_GPL(flush_work);
@@ -2986,7 +2993,7 @@ static bool __cancel_work_timer(struct work_struct *work, bool is_dwork)
* isn't executing.
*/
if (wq_online)
- flush_work(work);
+ __flush_work(work, true);
clear_work_data(work);