Commit 8af16926 authored by Jens Axboe's avatar Jens Axboe
Browse files

futex: add wake_data to struct futex_q 



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.

Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 194bb58c

kernel/futex/futex.h

+2 −0
Original line number Diff line number Diff line
@@ -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;