linux-kernel - [PATCH v3 0/3] Coresight TMC-ETR some bugfixes and cleanups

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Message-ID: <20250818080600.418425-1-hejunhao3@huawei.com>
Date: Mon, 18 Aug 2025 16:05:57 +0800
From: Junhao He <hejunhao3@...wei.com>
To: <suzuki.poulose@....com>, <james.clark@....com>,
	<anshuman.khandual@....com>, <leo.yan@....com>
CC: <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>,
	<jonathan.cameron@...wei.com>, <yangyicong@...wei.com>,
	<prime.zeng@...ilicon.com>, <hejunhao3@...wei.com>
Subject: [PATCH v3 0/3] Coresight TMC-ETR some bugfixes and cleanups

This patchset builds upon Yicong's previous patches [1].

Introducing fix two race issues found by using TMC-ETR and CATU, Two
cleanups found when debugging the issues.

[1] https://lore.kernel.org/linux-arm-kernel/20241202092419.11777-1-yangyicong@huawei.com/

---
Changes in v3:
 - Patches 1: Additional comment for tmc_drvdata::etr_mode. Update
 comment for tmc_drvdata::reading with Jonathan's Tag.
 - Patches 2: Replace scoped_guard with guard with Jonathan's Tag.
 - Patches 2: Fix spinlock to raw_spinlock, and refactor this code based
 on Leo's suggested solution. 
 - Patches 3: change the size's type to ssize_t and use max_t to simplify
 the code with Leo's Tag.
Link: https://lore.kernel.org/linux-arm-kernel/20250620075412.952934-1-hejunhao3@huawei.com/

Changes in v2:
- Updated the commit of patch2.
- Rebase to v6.16-rc1

Junhao He (1):
  coresight: tmc: refactor the tmc-etr mode setting to avoid race
    conditions

Yicong Yang (2):
  coresight: tmc: Add missing doc including reading and etr_mode of
    struct tmc_drvdata
  coresight: tmc: Decouple the perf buffer allocation from sysfs mode

 .../hwtracing/coresight/coresight-tmc-etr.c   | 110 ++++++++----------
 drivers/hwtracing/coresight/coresight-tmc.h   |   2 +
 2 files changed, 53 insertions(+), 59 deletions(-)

-- 
2.33.0