From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752246AbdHRIn2 (ORCPT ); Fri, 18 Aug 2017 04:43:28 -0400 Received: from foss.arm.com ([217.140.101.70]:59360 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750913AbdHRIje (ORCPT ); Fri, 18 Aug 2017 04:39:34 -0400 From: Marc Zyngier To: Thomas Gleixner Cc: Wei Xu , James Hogan , Jason Cooper , Andrew Lunn , Gregory Clement , Sebastian Hesselbarth , Kevin Cernekee , Florian Fainelli , Chris Zankel , Max Filippov , Paul Burton , Matt Redfearn , linux-kernel@vger.kernel.org Subject: [PATCH v2 01/12] genirq: Restrict effective affinity to interrupts actually using it Date: Fri, 18 Aug 2017 09:39:14 +0100 Message-Id: <20170818083925.10108-2-marc.zyngier@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170818083925.10108-1-marc.zyngier@arm.com> References: <20170818083925.10108-1-marc.zyngier@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Just because CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK is selected doesn't mean that all the interrupts are using the effective affinity mask. For a number of them, this mask is likely to be empty. In order to deal with this, let's restrict the use of the effective affinity mask to these interrupts that have a non empty effective affinity. Signed-off-by: Marc Zyngier --- include/linux/irq.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/irq.h b/include/linux/irq.h index d2d543794093..dcfac6c8ba18 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -781,7 +781,10 @@ static inline struct cpumask *irq_data_get_affinity_mask(struct irq_data *d) static inline struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d) { - return d->common->effective_affinity; + if (!cpumask_empty(d->common->effective_affinity)) + return d->common->effective_affinity; + + return d->common->affinity; } static inline void irq_data_update_effective_affinity(struct irq_data *d, const struct cpumask *m) -- 2.11.0