From nobody Fri Dec 19 18:18:45 2025 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 40208252907 for ; Wed, 12 Mar 2025 15:16:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741792606; cv=none; b=Emd53t6EgbxaSi/9nGVKcwZJoJvV3QDh0wBbrR0oG2q0FGH19uCrMmCVSr7/VUddVmWHJhPuAc9Lh1EuBIpYRsX/RQUQHGwuUH1UeNRs+mMLMFtruz3eO0P+UezZnlmw1LiHYxpxUhk+7HgBtuJveuSaEx7jrjaXgY2tFWNPaLg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741792606; c=relaxed/simple; bh=zNHF9gLRJbaWgJ86a6QXAXpvHh0UaOvRjG2O6sAVe6g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kYQ5RCFdJaIQnmYBXD+Fd0W64A8Cd8NdO5JIenEjEBzfdGU94ZEM3WuOciFZJSm4xcd31aC8IIThlk3iXbeDZ7pD6FGkvhr9lpKXFSTaj48QilpiAZrtap8Hot0JoJavV8fitFUCxooLAlryj/8rT5AIe57kEn7KObyIC07LMtE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=p8HQJS9j; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=/6YnKMHK; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="p8HQJS9j"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="/6YnKMHK" From: Sebastian Andrzej Siewior DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1741792602; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=k8eVr2NQkknRf1y68E2hvHz4ee/KkpMgqGwjShLOjZE=; b=p8HQJS9joM1yZg+lnVruYvXCUayevADHVRUB48NXX2m/7EStQt+xCAuBB0bBnknsis08l4 GAumTG5wSqIGRlrAjgTiVPd3H6vu81U9xcfST3ygjUuQtaCbhDK+/BYTF1LNGOqyiPHvqT clSSZQMjbuIjGos9zKgcYSFfeb3TZO+7taqmI6qKwuNyYaphHjxdJwCGRX8tD3MDCpZhB3 m8ZVCpefMgl8GB+DpZnw2FhFFseFkoSlCv6TfX6uqPX3E2a0teJSCw/HFXueVF995B1tmV BsNdxFZaRriTgPBXO5/fpfBPJexEAX9WeHC+1JotWIVuLlcl2YJr0MDbZjKHxA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1741792602; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=k8eVr2NQkknRf1y68E2hvHz4ee/KkpMgqGwjShLOjZE=; b=/6YnKMHKwaTB/t80orjLcoyyRn91o/s9BKHuSBrfYjr7oCO4AXNHKdjfqYI8t7gy+KuOpO vDjytlNFqusFnvDg== To: linux-kernel@vger.kernel.org Cc: =?UTF-8?q?Andr=C3=A9=20Almeida?= , Darren Hart , Davidlohr Bueso , Ingo Molnar , Juri Lelli , Peter Zijlstra , Thomas Gleixner , Valentin Schneider , Waiman Long , Sebastian Andrzej Siewior Subject: [PATCH v10 06/21] futex: Create helper function to initialize a hash slot. Date: Wed, 12 Mar 2025 16:16:19 +0100 Message-ID: <20250312151634.2183278-7-bigeasy@linutronix.de> In-Reply-To: <20250312151634.2183278-1-bigeasy@linutronix.de> References: <20250312151634.2183278-1-bigeasy@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Sebastian Andrzej Siewior --- 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); } =20 +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 =3D 1UL << futex_shift; =20 - for (i =3D 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 =3D 0; i < hashsize; i++) + futex_hash_bucket_init(&futex_queues[i]); =20 futex_hashmask =3D hashsize - 1; return 0; --=20 2.47.2