[PATCH v10 06/21] futex: Create helper function to initialize a hash slot.

[Sebastian Andrzej Siewior]

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