linux-kernel - [PATCH v2 00/10] perf: Avoid placing cpumask var on stack

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Message-Id: <20240403125109.2054881-1-dawei.li@shingroup.cn>
Date: Wed,  3 Apr 2024 20:50:59 +0800
From: Dawei Li <dawei.li@...ngroup.cn>
To: will@...nel.org,
	mark.rutland@....com,
	yury.norov@...il.com,
	linux@...musvillemoes.dk
Cc: xueshuai@...ux.alibaba.com,
	renyu.zj@...ux.alibaba.com,
	yangyicong@...ilicon.com,
	jonathan.cameron@...wei.com,
	andersson@...nel.org,
	konrad.dybcio@...aro.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	Dawei Li <dawei.li@...ngroup.cn>
Subject: [PATCH v2 00/10] perf: Avoid placing cpumask var on stack

Hi all,

This is v2 of [1] and [2] which basically eliminate cpumask var allocation
on stack for perf subsystem.

Change since v1:
- Change from dynamic allocation to a temporary var free helper:
  cpumask_any_and_but().	[Mark]

- Some minor coding style improvements, reverse chrismas tree e.g.

- For cpumask_any_and_but() itself:
  - Moved to cpumask.h, just like other helpers.
  - Return value converted to unsigned int.
  - Remove EXPORT_SYMBOL, for obvious reason.

[1]:
https://lore.kernel.org/lkml/20240402105610.1695644-1-dawei.li@shingroup.cn/

[2]:
https://lore.kernel.org/lkml/1486381132-5610-1-git-send-email-mark.rutland@arm.com/

Dawei Li (9):
  perf/alibaba_uncore_drw: Avoid placing cpumask var on stack
  perf/arm-cmn: Avoid placing cpumask var on stack
  perf/arm_cspmu: Avoid placing cpumask var on stack
  perf/arm_dsu: Avoid placing cpumask var on stack
  perf/dwc_pcie: Avoid placing cpumask var on stack
  perf/hisi_pcie: Avoid placing cpumask var on stack
  perf/hisi_uncore: Avoid placing cpumask var on stack
  perf/qcom_l2: Avoid placing cpumask var on stack
  perf/thunderx2: Avoid placing cpumask var on stack

Mark Rutland (1):
  cpumask: add cpumask_any_and_but()

 drivers/perf/alibaba_uncore_drw_pmu.c    | 10 +++-------
 drivers/perf/arm-cmn.c                   | 10 +++++-----
 drivers/perf/arm_cspmu/arm_cspmu.c       |  8 +++-----
 drivers/perf/arm_dsu_pmu.c               | 19 ++++++-------------
 drivers/perf/dwc_pcie_pmu.c              | 10 ++++------
 drivers/perf/hisilicon/hisi_pcie_pmu.c   |  9 ++++-----
 drivers/perf/hisilicon/hisi_uncore_pmu.c |  6 ++----
 drivers/perf/qcom_l2_pmu.c               |  8 +++-----
 drivers/perf/thunderx2_pmu.c             | 10 +++-------
 include/linux/cpumask.h                  | 23 +++++++++++++++++++++++
 10 files changed, 56 insertions(+), 57 deletions(-)

Thanks,

    Dawei

-- 
2.27.0