linux-kernel - Re: [PATCH 0/4] small fix for configuaring etm csdev via sysfs

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Message-ID: <aBSkOGdRygbhTym4@e129823.arm.com>
Date: Fri, 2 May 2025 11:53:44 +0100
From: Yeoreum Yun <yeoreum.yun@....com>
To: suzuki.poulose@....com, mike.leach@...aro.org, james.clark@...aro.org,
	alexander.shishkin@...ux.intel.com
Cc: coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] small fix for configuaring etm csdev via sysfs

Gentle ping in case of forgotten.

> when etm csdev's configuration is modified via sysfs while etm is being
> enabled via perf, enabled etm could run with different configuration
> from perf_event.
>
> Also, there are some redeundant usage of drvdata->spinlock in
> etm_starting/dying_cpu() with enable/disable etm device.
>
> This patchset fixes above small problems.
>
> NOTE:
>    This patchset based on:
>      - https://lore.kernel.org/linux-arm-kernel/20241220104521.809071-1-yeoreum.yun@arm.com/
>
> Yeoreum Yun (4):
>   coresight/etm4x: disallow altering config via sysfs while enabled
>   coresight/etm4x: remove redundant usage of drvdata->spinlock
>   coresight/etm3x: disallow altering config via sysfs while enabled
>   coresight/etm3x: remove redundant usage of drvdata->spinlock
>
>  .../coresight/coresight-etm3x-core.c          |  33 ++---
>  .../coresight/coresight-etm3x-sysfs.c         | 120 ++++++++++++++++
>  .../coresight/coresight-etm4x-core.c          |  20 +--
>  .../coresight/coresight-etm4x-sysfs.c         | 132 +++++++++++++++++-
>  4 files changed, 272 insertions(+), 33 deletions(-)
>
> --
> LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}
>

--
Sincerely,
Yeoreum Yun