Commit 9a9bdfdd authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Peter Zijlstra
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futex: Create helper function to initialize a hash slot 



Factor out the futex_hash_bucket initialisation into a helpr function.
The helper function will be used in a follow up patch implementing
process private hash buckets.

Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250416162921.513656-12-bigeasy@linutronix.de
parent b04b8f30

kernel/futex/core.c

+9 −5
Original line number Diff line number Diff line
@@ -1160,6 +1160,13 @@ void futex_exit_release(struct task_struct *tsk) 
	futex_cleanup_end(tsk, FUTEX_STATE_DEAD);

}



static void futex_hash_bucket_init(struct futex_hash_bucket *fhb)

{

	atomic_set(&fhb->waiters, 0);

	plist_head_init(&fhb->chain);

	spin_lock_init(&fhb->lock);

}



static int __init futex_init(void)

{

	unsigned long hashsize, i;
@@ -1177,11 +1184,8 @@ static int __init futex_init(void) 
					       hashsize, hashsize);

	hashsize = 1UL << futex_shift;



	for (i = 0; i < hashsize; i++) {

		atomic_set(&futex_queues[i].waiters, 0);

		plist_head_init(&futex_queues[i].chain);

		spin_lock_init(&futex_queues[i].lock);

	}

	for (i = 0; i < hashsize; i++)

		futex_hash_bucket_init(&futex_queues[i]);



	futex_hashmask = hashsize - 1;

	return 0;