From nobody Mon Apr 6 10:42:05 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 599A130CD93; Mon, 13 Oct 2025 20:35:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760387757; cv=none; b=ZMP06tBXraUzoGL+apIMb2kq5n7XInUc3wo1DIv+RpvlhtxCSvvI15b/aow1UICMMNlQbjwPaJpL8Dfg3s8CAaMB0DunC2w3MWfF3Yyt+Ej6WYWLNwxVMMlwnDuUtsKM+swQO0mO1zhQi2s8qrZoIzLaho18zk5Xp6AF9ygU8dM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760387757; c=relaxed/simple; bh=VRca4O5xWSvVtV07vu7T/vayv/vKzk4YtiAHpk59aYg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UJFaAdXawr1QAAM7OGQH5M3x1pXjcejJnJcYD9ZzvGLhHx+WYzbNfxB3pR7SiwOIjvYblLOvDWU3L7CYAFgcZ+gMHu/B8Pmikvid9SoLr9WdvJt1o+TtvzfECbgHz/Dt2xCAss2VYwGVwW2PcwT6ZzpW5iWveNsYFGQ95IWTzZQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bhePkCQL; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="bhePkCQL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E744EC4CEFE; Mon, 13 Oct 2025 20:35:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760387757; bh=VRca4O5xWSvVtV07vu7T/vayv/vKzk4YtiAHpk59aYg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bhePkCQL/66n70lV9xZxYwRRP+VnIkS+CH6ARH9WtcldkTiOp5Ob386EHKyl3AMBa 9RYk+wDM4ovm/56mZ6bzkEEh9UnuW+WYeuSJUUus+TACOJTuYhJNsvGA+p75if0nIr eF/1rT4tHcaKgPPXNTve99sj8RqEvhRdV8+5zdkPR+FLUveu003ODzhiA2YZdSiMzN L6N60HePBPGl52ouzhwYD9vF78x7wP2Yvg3D7LD2eoI4MiHO+TabowgoVKZ1e5gdiV DR0pYSljDpr9QuAxXqKVRzlLFoIoLIv9vydg718x4I1aBRpQXVEM3pIv7QhMJ6fOYq +KzLX6+lrv2Iw== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , =?UTF-8?q?Michal=20Koutn=C3=BD?= , Andrew Morton , Bjorn Helgaas , Catalin Marinas , Danilo Krummrich , "David S . Miller" , Eric Dumazet , Gabriele Monaco , Greg Kroah-Hartman , Ingo Molnar , Jakub Kicinski , Jens Axboe , Johannes Weiner , Lai Jiangshan , Marco Crivellari , Michal Hocko , Muchun Song , Paolo Abeni , Peter Zijlstra , Phil Auld , "Rafael J . Wysocki" , Roman Gushchin , Shakeel Butt , Simon Horman , Tejun Heo , Thomas Gleixner , Vlastimil Babka , Waiman Long , Will Deacon , cgroups@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-block@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH 31/33] kthread: Document kthread_affine_preferred() Date: Mon, 13 Oct 2025 22:31:44 +0200 Message-ID: <20251013203146.10162-32-frederic@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013203146.10162-1-frederic@kernel.org> References: <20251013203146.10162-1-frederic@kernel.org> 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" The documentation of this new API has been overlooked during its introduction. Fill the gap. Signed-off-by: Frederic Weisbecker --- kernel/kthread.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/kernel/kthread.c b/kernel/kthread.c index f3397cf7542a..b989aeaa441a 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -857,6 +857,18 @@ int kthreadd(void *unused) return 0; } =20 +/** + * kthread_affine_preferred - Define a kthread's preferred affinity + * @p: thread created by kthread_create(). + * @cpumask: preferred mask of CPUs (might not be online, must be possible= ) for @k + * to run on. + * + * Similar to kthread_bind_mask() except that the affinity is not a requir= ement + * but rather a preference that can be constrained by CPU isolation or CPU= hotplug. + * Must be called before the first wakeup of the kthread. + * + * Returns 0 if the affinity has been applied. + */ int kthread_affine_preferred(struct task_struct *p, const struct cpumask *= mask) { struct kthread *kthread =3D to_kthread(p); --=20 2.51.0