1 files changed, 17 insertions, 1 deletions

diff --git a/fs/btrfs/async-thread.h b/fs/btrfs/async-thread.h
index 1b511c109db6..5077746cf85e 100644
--- a/fs/btrfs/async-thread.h
+++ b/fs/btrfs/async-thread.h
@@ -64,6 +64,8 @@ struct btrfs_workers {
         /* current number of running workers */
         int num_workers;
 
+        int num_workers_starting;
+
         /* max number of workers allowed.  changed by btrfs_start_workers */
         int max_workers;
 
@@ -73,6 +75,16 @@ struct btrfs_workers {
         /* force completions in the order they were queued */
         int ordered;
 
+        /* more workers required, but in an interrupt handler */
+        int atomic_start_pending;
+
+        /*
+         * are we allowed to sleep while starting workers or are we required
+         * to start them at a later time?  If we can't sleep, this indicates
+         * which queue we need to use to schedule thread creation.
+         */
+        struct btrfs_workers *atomic_worker_start;
+
         /* list with all the work threads.  The workers on the idle thread
          * may be actively servicing jobs, but they haven't yet hit the
          * idle thresh limit above.
@@ -90,6 +102,9 @@ struct btrfs_workers {
         /* lock for finding the next worker thread to queue on */
         spinlock_t lock;
 
+        /* lock for the ordered lists */
+        spinlock_t order_lock;
+
         /* extra name for this worker, used for current->name */
         char *name;
 };
@@ -97,7 +112,8 @@ struct btrfs_workers {
 int btrfs_queue_worker(struct btrfs_workers *workers, struct btrfs_work *work);
 int btrfs_start_workers(struct btrfs_workers *workers, int num_workers);
 int btrfs_stop_workers(struct btrfs_workers *workers);
-void btrfs_init_workers(struct btrfs_workers *workers, char *name, int max);
+void btrfs_init_workers(struct btrfs_workers *workers, char *name, int max,
+                        struct btrfs_workers *async_starter);
 int btrfs_requeue_work(struct btrfs_work *work);
 void btrfs_set_work_high_prio(struct btrfs_work *work);
 #endif