[PATCH v10 06/21] futex: Create helper function to initialize a hash slot.
From: Sebastian Andrzej Siewior
Date: Wed Mar 12 2025 - 11:17:34 EST
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: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
kernel/futex/core.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/kernel/futex/core.c b/kernel/futex/core.c
index 08cf54567aeb6..c6c5cde78e0cb 100644
--- a/kernel/futex/core.c
+++ b/kernel/futex/core.c
@@ -1122,6 +1122,13 @@ 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;
@@ -1139,11 +1146,8 @@ 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;
--
2.47.2