vhost: lockless enqueuing

[mirror_ubuntu-bionic-kernel.git] / drivers / vhost / vhost.h

diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index d36d8beb33512a200eed5e93e4bd85f65681607c..6690e645d2f88d25fbb095e1d2dd8e475c342003 100644 (file)
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -15,13 +15,15 @@
 struct vhost_work;
 typedef void (*vhost_work_fn_t)(struct vhost_work *work);
 
+#define VHOST_WORK_QUEUED 1
 struct vhost_work {
-       struct list_head          node;
+       struct llist_node         node;
        vhost_work_fn_t           fn;
        wait_queue_head_t         done;
        int                       flushing;
        unsigned                  queue_seq;
        unsigned                  done_seq;
+       unsigned long             flags;
 };
 
 /* Poll a file (eventfd or socket) */
@@ -126,8 +128,7 @@ struct vhost_dev {
        int nvqs;
        struct file *log_file;
        struct eventfd_ctx *log_ctx;
-       spinlock_t work_lock;
-       struct list_head work_list;
+       struct llist_head work_list;
        struct task_struct *worker;
 };