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

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Message-Id: <20241221165934.1161856-1-yeoreum.yun@arm.com>
Date: Sat, 21 Dec 2024 16:59:30 +0000
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,
	Yeoreum Yun <yeoreum.yun@....com>
Subject: [PATCH 0/4] small fix for configuaring etm csdev via sysfs

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(-)

--
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