[PATCH 09/12] futex: add wake_data to struct futex_q

[Jens Axboe <axboe@xxxxxxxxx>]

With handling multiple futex_q for waitv, we cannot easily go from the
futex_q to data related to that request or queue. Add a wake_data
argument that belongs to the wake handler assigned.

Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
---
 kernel/futex/futex.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/futex/futex.h b/kernel/futex/futex.h
index e04c74a34832..4633c99ea4b6 100644
--- a/kernel/futex/futex.h
+++ b/kernel/futex/futex.h
@@ -146,6 +146,7 @@ typedef void (futex_wake_fn)(struct wake_q_head *wake_q, struct futex_q *q);
  * @task:		the task waiting on the futex
  * @lock_ptr:		the hash bucket lock
  * @wake:		the wake handler for this queue
+ * @wake_data:		data associated with the wake handler
  * @key:		the key the futex is hashed on
  * @pi_state:		optional priority inheritance state
  * @rt_waiter:		rt_waiter storage for use with requeue_pi
@@ -171,6 +172,7 @@ struct futex_q {
 	struct task_struct *task;
 	spinlock_t *lock_ptr;
 	futex_wake_fn *wake;
+	void *wake_data;
 	union futex_key key;
 	struct futex_pi_state *pi_state;
 	struct rt_mutex_waiter *rt_waiter;
-- 
2.40.1