linux-kernel - Re: [PATCH v6 0/9] coresight: change some driver' spinlock type to raw_spinlock

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Message-ID: <174160625284.2197960.9649186230571551042.b4-ty@arm.com>
Date: Mon, 10 Mar 2025 11:32:05 +0000
From: Suzuki K Poulose <suzuki.poulose@....com>
To: mike.leach@...aro.org,
	james.clark@...aro.org,
	alexander.shishkin@...ux.intel.com,
	bigeasy@...utronix.de,
	clrkwllms@...nel.org,
	rostedt@...dmis.org,
	Yeoreum Yun <yeoreum.yun@....com>
Cc: Suzuki K Poulose <suzuki.poulose@....com>,
	coresight@...ts.linaro.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-rt-devel@...ts.linux.dev
Subject: Re: [PATCH v6 0/9] coresight: change some driver' spinlock type to raw_spinlock_t


On Thu, 06 Mar 2025 12:11:01 +0000, Yeoreum Yun wrote:
> In some coresight drivers, drvdata->spinlock can be held during __schedule()
> by perf_event_task_sched_out()/in().
> 
> Since drvdata->spinlock type is spinlock_t and
> perf_event_task_sched_out()/in() is called after acquiring rq_lock,
> which is raw_spinlock_t (an unsleepable lock),
> this poses an issue in PREEMPT_RT kernel where spinlock_t is sleepable.
> 
> [...]

Applied, thanks!

[1/9] coresight: change coresight_device lock type to raw_spinlock_t
      https://git.kernel.org/coresight/c/26f060c1
[2/9] coresight-etm4x: change etmv4_drvdata spinlock type to raw_spinlock_t
      https://git.kernel.org/coresight/c/743c5a97
[3/9] coresight: change coresight_trace_id_map's lock type to raw_spinlock_t
      https://git.kernel.org/coresight/c/4cf364ca
[4/9] coresight-cti: change cti_drvdata spinlock's type to raw_spinlock_t
      https://git.kernel.org/coresight/c/e3044065
[5/9] coresight-etb10: change etb_drvdata spinlock's type to raw_spinlock_t
      https://git.kernel.org/coresight/c/6b80c0ab
[6/9] coresight-funnel: change funnel_drvdata spinlock's type to raw_spinlock_t
      https://git.kernel.org/coresight/c/56eb02f0
[7/9] coresight-replicator: change replicator_drvdata spinlock's type to raw_spinlock_t
      https://git.kernel.org/coresight/c/982d0a0e
[8/9] coresight-tmc: change tmc_drvdata spinlock's type to raw_spinlock_t
      https://git.kernel.org/coresight/c/db11f75b
[9/9] coresight/ultrasoc: change smb_drv_data spinlock's type to raw_spinlock_t
      https://git.kernel.org/coresight/c/d11eb31d

Best regards,
-- 
Suzuki K Poulose <suzuki.poulose@....com>