linux-kernel - Re: [PATCH v7 15/15] coresight: etm3x: docs: Alter sysfs documentation for trace id updates

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Message-ID: <da1415e3-3a7f-2c04-e0b5-fb7d49e14855@arm.com>
Date:   Mon, 16 Jan 2023 14:22:54 +0000
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     Mike Leach <mike.leach@...aro.org>, coresight@...ts.linaro.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     mathieu.poirier@...aro.org, peterz@...radead.org, mingo@...hat.com,
        acme@...nel.org, linux-perf-users@...r.kernel.org,
        leo.yan@...aro.org, quic_jinlmao@...cinc.com
Subject: Re: [PATCH v7 15/15] coresight: etm3x: docs: Alter sysfs
 documentation for trace id updates

On 16/01/2023 12:49, Mike Leach wrote:
> Sysfs access to etm3x trace ID value is now read-only due to recent
> trace updates and for consistency with etm4x.
> 
> Signed-off-by: Mike Leach <mike.leach@...aro.org>
> ---
>   Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x
> index 651602a61eac..234c33fbdb55 100644
> --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x
> +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x
> @@ -236,7 +236,7 @@ What:		/sys/bus/coresight/devices/<memory_map>.[etm|ptm]/traceid
>   Date:		November 2014
>   KernelVersion:	3.19
>   Contact:	Mathieu Poirier <mathieu.poirier@...aro.org>
> -Description: 	(RW) Holds the trace ID that will appear in the trace stream
> +Description: 	(RO) Holds the trace ID that will appear in the trace stream
>   		coming from this trace entity.
>   
>   What:		/sys/bus/coresight/devices/<memory_map>.[etm|ptm]/trigger_event


I have squashed this to PATCH 6, where the above sysfs file permission
is actually changed.

Thanks
Suzuki