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From: Marc Zyngier <marc.zyngier@arm.com>
To: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Pawel Moll <pawel.moll@arm.com>,
	Mark Rutland <mark.rutland@arm.com>
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	[thread overview]
Message-ID: <20170904173041.14119-1-marc.zyngier@arm.com> (raw)

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

             reply	other threads:[~2017-09-04 17:30 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-04 17:30 Marc Zyngier [this message]
2017-09-04 17:30 ` [PATCH 1/2] bus: arm-ccn: Fix use of smp_processor_id() in preemptible context Marc Zyngier
2017-09-04 17:37   ` Mark Rutland
2017-09-04 17:59     ` Marc Zyngier
2017-09-04 17:30 ` [PATCH 2/2] bus: arm-cci: " Marc Zyngier

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