From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793207699; b=4Ulw6yMYFoFZYdhTQGg4CB46X9YlBHoBpj4K23iq7MxV++m5LJ1CYdETipy105O/Rwa6 hwIwMPT8ZOE1zdqemnPy5S4tam0dVCMI9fcmCTlse/6oSi65/OTaApuCv3sb+1AlRv8wk eZkXrvs4BPrGEFLumJ4UiGF8Aegr7+1EW1PQnEq4xjpiNKfFTdD+ZaojxvcyhTRaNAvKK yXglYqi6s5EbCOYdZrba9A3fTfreBXug0vtj24GXCIxMiMIm2fK5ePICCGqyQyIIauY8N imTym8SiBFcQeNmHIgkAyX6/z5vaVrZeCpdKVlDCfAVmLlnrPqkF9CronwPmGbtaXlA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793207699; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=kHbVVMvC/KIOYFAhGJxtM/9wn5oil+tn2khPG+u2E8Q=; b=efLBT5yICa9sFD7uaV8T/O2XRVDVbnlfqmZtTSWHh8hd3ejpvWHvIEDNdAWadMd+A2L1 WfKyaPdTpfwMcyUv5FqPLDADFis/OCkkErdZHNSz0SZJTZFi9RxccwafQ98wN4nuXYdW7 9Qs+Gmy+NnuFluSlIWQNxGn9xDtex4adWzIFuyZtoSHrhS1/D0/gBDqLpj1zT7K9WOA7f pUp30u/5hFvv9KBCg9VxdEQEH+rczQq1e3MioFPgUa0pPHQa4+JREjBt8JixfHI6ctT5I F+8oNUdnP9Xr3e8qmgf1mRdBNqkKbpKKJ7HA9P767XeLOUIzI2rMA64yRs2phB0Yq0Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b="iq/TZb1Y"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 05907606A31F; Wed, 28 Oct 2026 17:14:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=iq/TZb1Y Received: by smtp.kernel.org (Postfix) with ESMTPSA id 56BE71F031E0; Wed, 28 Oct 2026 17:14:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793207698; bh=kHbVVMvC/KIOYFAhGJxtM/9wn5oil+tn2khPG+u2E8Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=iq/TZb1YWA8UILH66PfZIh9O/5w9GRnaQVqHZNdRy0RHTsgp9JoD2j3yXzq5Vqxeq /1WAqDy7e+jCmaI6/bMNVGKNUD0OKyCiU+Z0IxWHQ/wZnoqx1C6QsfvNFLvnPdSnnp NnqIYdTv6yypJ3eswJIO2+9qW/X8VuvAI10tc/Ts= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zqiang , Tejun Heo Subject: [PATCH 6.12 108/247] workqueue: Use raise_softirq() to trigger softirq in irq_work handler Date: Wed, 28 Oct 2026 17:58:31 +0100 Message-ID: <20261028165949.956117179@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028165947.349197979@linuxfoundation.org> References: <20261028165947.349197979@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zqiang commit 7e2f2a377ac9f50296ad60bd331f0d4def7aee51 upstream. bh_pool_kick_normal() and bh_pool_kick_highpri() are registered via init_irq_work() without the IRQ_WORK_HARD_IRQ flag. On PREEMPT_RT, such irq_work items are processed by the per-CPU irq_workd kthread in preemptible task context with IRQs enabled. However, raise_softirq_irqoff() requires IRQs to be disabled. Calling it from irq_workd trips the lockdep assertion in __raise_softirq_irqoff() and the non-atomic update of the softirq pending mask can lose bits raised by an interrupt on the same CPU. Replace raise_softirq_irqoff() with raise_softirq() in the irq_work handlers. Fixes: 2f34d7337d98 ("workqueue: Fix queue_work_on() with BH workqueues") Cc: stable@vger.kernel.org # v6.9+ Signed-off-by: Zqiang Signed-off-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- kernel/workqueue.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -7738,12 +7738,12 @@ static inline void wq_watchdog_init(void static void bh_pool_kick_normal(struct irq_work *irq_work) { - raise_softirq_irqoff(TASKLET_SOFTIRQ); + raise_softirq(TASKLET_SOFTIRQ); } static void bh_pool_kick_highpri(struct irq_work *irq_work) { - raise_softirq_irqoff(HI_SOFTIRQ); + raise_softirq(HI_SOFTIRQ); } static void __init restrict_unbound_cpumask(const char *name, const struct cpumask *mask)