From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 352AEEEEC1C for ; Thu, 1 Jan 2026 22:19:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ArkG22qdZfeZQL1mg0jDVHZEGKaocQfpykvwK+7103I=; b=UqssPiTiO0nbfJVAxH1zkJqMsj gDWbtiBSb+kZJuIdU+lBJHkjHc93IVzDKBudSLuMy7L0qejHdwrE/CnWfjSe60x64G4IKveCBGxqa acYrH3kAY1FIxs990RLMc+hA+NXS382v3LgBTzvaIEnGQIEUYO/ONGOMwqUlD5KJ7Ul/fws+mxFDN WPxs7bNyh8dzmIZseCu7Evl1D6Q4B31jmcnIwqyfb0cnrKcuTFuhPSh7l3/JvCNhZ6p0vhpVMBo8k u+A/45B2hyUlRsTrz9rF9Aw5AfUmC9tio92VxtLiqRyeEc+LoGTiyqGMAFIVoUnLlSCHTAqofP77H ID6mOAdA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vbR0Q-00000007a47-1z3G; Thu, 01 Jan 2026 22:18:57 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vbR09-00000007Zno-1TiJ for linux-arm-kernel@lists.infradead.org; Thu, 01 Jan 2026 22:18:50 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 0865F4390A; Thu, 1 Jan 2026 22:18:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CD9BBC4CEF7; Thu, 1 Jan 2026 22:18:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767305916; bh=kluxsGzh3yUyBuEdMQW2ChyzrN9Wa4B73tu4Iho0QMM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sCUxHlmBfKU8mEXn9Gb6CiqvN470rNDukwLhsH8IJ25cs2s+T2WMY+Xx+K/FU+2r6 PWsWM16rGucx0Nc742fDtSvNWY1bkV0VUXsF5pfaMbTJnzC0FB4VXwwfk3OsCfrrVs Aes5McW6JYJvBoWjkGtGQNrKdKBRINtBXSrrCueLNNFZzd6m1GyhdBfhN8pvt1oVLz dWFggAnFJp+V6MOO6xFIu638EERhe2JFPZVw8ufLBF2V/0fMA7B289koJ3yAHePmjy LNdt9BUzdzGeognpYEt6DWKuX1Q1Af8Yn0+HYm26nah83C++ezo5x4vFhlYHpufrs9 Ycf6r9GynPcvQ== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , =?UTF-8?q?Michal=20Koutn=C3=BD?= , Andrew Morton , Bjorn Helgaas , Catalin Marinas , Chen Ridong , 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 32/33] kthread: Document kthread_affine_preferred() Date: Thu, 1 Jan 2026 23:13:57 +0100 Message-ID: <20260101221359.22298-33-frederic@kernel.org> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20260101221359.22298-1-frederic@kernel.org> References: <20260101221359.22298-1-frederic@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260101_141844_233865_7D18AA7A X-CRM114-Status: GOOD ( 12.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 51f419139dea..c50f4c0eabfe 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -856,6 +856,18 @@ int kthreadd(void *unused) return 0; } +/** + * kthread_affine_preferred - Define a kthread's preferred affinity + * @p: thread created by kthread_create(). + * @mask: preferred mask of CPUs (might not be online, must be possible) for @p + * to run on. + * + * Similar to kthread_bind_mask() except that the affinity is not a requirement + * 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 = to_kthread(p); -- 2.51.1