[PATCH 5/8] futex: add wake_data to struct futex_q

From: Jens Axboe
Date: Wed Jul 12 2023 - 12:21:59 EST


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 | 1 +
1 file changed, 1 insertion(+)

diff --git a/kernel/futex/futex.h b/kernel/futex/futex.h
index 1d531244fb71..24180a95bdc8 100644
--- a/kernel/futex/futex.h
+++ b/kernel/futex/futex.h
@@ -102,6 +102,7 @@ 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