Re: [PATCH 01/11] coresight-etm4x: Adding CoreSight ETM4x driver
From: Linus Walleij
Date: Tue Apr 28 2015 - 08:28:32 EST
On Thu, Apr 23, 2015 at 12:40 AM, Mathieu Poirier
> From: Pratik Patel <pratikp@xxxxxxxxxxxxxx>
> This driver manages the CoreSight ETMv4 (Embedded Trace Macrocell) IP block
> to support HW assisted tracing on ARMv7 and ARMv8 architectures.
> Signed-off-by: Pratik Patel <pratikp@xxxxxxxxxxxxxx>
> Signed-off-by: Kaixu Xia <xiakaixu@xxxxxxxxxx>
> Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
> +/* The number of ETMv4 currently registered */
> +static int etm4_count;
> +static struct etmv4_drvdata *etmdrvdata[NR_CPUS];
Don't you need a mutex or something around etm4_count so
as to protect it? You could also make it an atomic.
Also why is it a signed int ... unsigned int?
I know, lame comments, the runtime PM stuff looks perfect now,
someone had a refcount comment but it's doing the right thing.
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