All of lore.kernel.org
 help / color / mirror / Atom feed
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170904173041.14119-1-marc.zyngier@arm.com \
    --to=marc.zyngier@arm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=lorenzo.pieralisi@arm.com \
    --cc=mark.rutland@arm.com \
    --cc=pawel.moll@arm.com \
    --cc=suzuki.poulose@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.