[PATCH 0/2] riscv: unaligned: stop using kthread for vector speed probe

From: Nam Cao <namcao@linutronix.de>
To: Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Alexandre Ghiti <alex@ghiti.fr>,
	Andrew Jones <andrew.jones@oss.qualcomm.com>,
	Jingwei Wang <wangjingwei@iscas.ac.cn>,
	Anirudh Srinivasan <asrinivasan@oss.tenstorrent.com>,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: Nam Cao <namcao@linutronix.de>
Subject: [PATCH 0/2] riscv: unaligned: stop using kthread for vector speed probe
Date: Wed, 17 Jun 2026 05:38:23 +0200	[thread overview]
Message-ID: <cover.1781666867.git.namcao@linutronix.de> (raw)

Hi,

This series is follow-up to the discussion at:
https://lore.kernel.org/linux-riscv/20260612-vec_unaligned_drop_init-v1-1-df969210ae34@oss.tenstorrent.com/

It removes the kthread usage for unaligned vector access speed probe, avoiding
a bug that the kthread may still be excuting a __init function that have
already been freed.

It also allows removing some vdso synchronization, simplify the code.

This kthread has been bothering me for a while now, and the recent bug report
pushed me to post this series.

Nam Cao (2):
  riscv: unaligned: stop using kthread for
    check_vector_unaligned_access()
  Revert "riscv: hwprobe: Fix stale vDSO data for late-initialized keys
    at boot"

 arch/riscv/include/asm/hwprobe.h           |  7 ---
 arch/riscv/include/asm/vdso/arch_data.h    |  6 --
 arch/riscv/kernel/sys_hwprobe.c            | 70 ++++------------------
 arch/riscv/kernel/unaligned_access_speed.c | 19 +-----
 arch/riscv/kernel/vdso/hwprobe.c           |  2 +-
 5 files changed, 15 insertions(+), 89 deletions(-)

-- 
2.47.3

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