linux-kernel - Re: [PATCH 2/2] arm64: perf: add support for percpu pmu interrupt

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Date:	Fri, 8 Nov 2013 15:57:17 +0000
From:	Will Deacon <will.deacon@....com>
To:	Vinayak Kale <vkale@....com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"patches@....com" <patches@....com>,
	"jcm@...hat.com" <jcm@...hat.com>, Tuan Phan <tphan@....com>
Subject: Re: [PATCH 2/2] arm64: perf: add support for percpu pmu interrupt

On Wed, Nov 06, 2013 at 12:07:37PM +0000, Vinayak Kale wrote:
> Add support for irq registration when pmu interrupt is percpu.
> 
> Signed-off-by: Vinayak Kale <vkale@....com>
> Signed-off-by: Tuan Phan <tphan@....com>
> ---
>  arch/arm64/kernel/perf_event.c |  109 +++++++++++++++++++++++++++++-----------
>  1 file changed, 81 insertions(+), 28 deletions(-)
> 
> diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
> index cea1594..e60dae3 100644
> --- a/arch/arm64/kernel/perf_event.c
> +++ b/arch/arm64/kernel/perf_event.c
> @@ -44,6 +44,7 @@
>  static DEFINE_PER_CPU(struct perf_event * [ARMPMU_MAX_HWEVENTS], hw_events);
>  static DEFINE_PER_CPU(unsigned long [BITS_TO_LONGS(ARMPMU_MAX_HWEVENTS)], used_mask);
>  static DEFINE_PER_CPU(struct pmu_hw_events, cpu_hw_events);
> +static bool is_percpuirq;

This isn't a global property; it should be part of the struct arm_pmu.
The rest of the patch looks ok, but obvious requires you to merge the core
changes first.

Will
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