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Subject[PATCH 5/8] futex: add wake_data to struct futex_q
Date
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@kernel.dk>
---
kernel/futex/futex.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/kernel/futex/futex.h b/kernel/futex/futex.h
index 33835b81e0c3..76f6c2e0f539 100644
--- a/kernel/futex/futex.h
+++ b/kernel/futex/futex.h
@@ -148,6 +148,7 @@ 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
@@ -173,6 +174,7 @@ 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
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