From: mark.rutland@arm.com (Mark Rutland)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 2/2] soc: qcom: add l2 cache perf events driver
Date: Fri, 2 Sep 2016 11:06:24 +0100 [thread overview]
Message-ID: <20160902100624.GB9261@leverpostej> (raw)
In-Reply-To: <20160901163051.GA6731@leverpostej>
On Thu, Sep 01, 2016 at 05:30:52PM +0100, Mark Rutland wrote:
> On Tue, Aug 30, 2016 at 01:01:33PM -0400, Neil Leeder wrote:
> > +static DEFINE_MUTEX(l2cache_pmu_mutex);
>
> A mutex (which can sleep) is not safe for the hotplug state machine
> stuff. See recent patches to the arm_pmu code.
>
> That's further subsumed by the multi-instance stuff, so this (and the
> list) will not be necessary shortly.
This has *just* landed in tip. See the smp/hotplug branch [1]. The
arm_pmu change [2] should serve as an example of what to do.
Thanks,
Mark.
[1] https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/log/?h=smp/hotplug
[2] https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?h=smp/hotplug&id=cc727977acb0fe05b7aa1f00cccb893530820895
next prev parent reply other threads:[~2016-09-02 10:06 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-30 17:01 [PATCH v4 0/2] qcom: add l2 cache perf events driver Neil Leeder
2016-08-30 17:01 ` [PATCH v4 1/2] soc: qcom: provide mechanism for drivers to access L2 registers Neil Leeder
2016-08-30 17:01 ` [PATCH v4 2/2] soc: qcom: add l2 cache perf events driver Neil Leeder
2016-09-01 16:30 ` Mark Rutland
2016-09-02 10:06 ` Mark Rutland [this message]
2016-09-16 15:33 ` Neil Leeder
2016-09-16 16:40 ` Mark Rutland
2016-09-16 19:51 ` Neil Leeder
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