From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753955AbdIDRat (ORCPT ); Mon, 4 Sep 2017 13:30:49 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:60486 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753890AbdIDRas (ORCPT ); Mon, 4 Sep 2017 13:30:48 -0400 From: Marc Zyngier To: Lorenzo Pieralisi , Suzuki K Poulose , Pawel Moll , Mark Rutland Cc: linux-kernel@vger.kernel.org Subject: [PATCH 0/2] bus: CCN/CCI: Fix use of smp_processor_id() Date: Mon, 4 Sep 2017 18:30:39 +0100 Message-Id: <20170904173041.14119-1-marc.zyngier@arm.com> X-Mailer: git-send-email 2.11.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I've just noticed that both the CCI and CCN drivers have a small buglet in that they call smp_processor_id() from preemptible context, which is frown upon (having just booted a 4.13 kernel with DEBUG_PREEMPT on my Seattle, I was surprised to be greeted with a nice backtrace...). I've tested the CCN patch on the same Seatle box, but I've only compile-tested the equivalent CCI patch (which is obviously correct -- famous last words...). Thanks, M. Marc Zyngier (2): bus: arm-ccn: Fix use of smp_processor_id() in preemptible context bus: arm-cci: Fix use of smp_processor_id() in preemptible context drivers/bus/arm-cci.c | 3 ++- drivers/bus/arm-ccn.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) -- 2.11.0