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Message-ID: <170863444851.1479840.10249410842428140526.stgit@dwillia2-xfh.jf.intel.com>
Date: Thu, 22 Feb 2024 12:40:48 -0800
From: Dan Williams <dan.j.williams@...el.com>
To: gregkh@...uxfoundation.org
Cc: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
Marc Herbert <marc.herbert@...el.com>, "Rafael J. Wysocki" <rafael@...nel.org>,
linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
linux-coco@...ts.linux.dev, alsa-devel@...a-project.org
Subject: [PATCH 0/3] sysfs: Group visibility fixups
Hey Greg,
Marc was able to get me a backtrace for that bootup hang scenario that
Pierre noted here [1]. A Tested-by is still pending, but I am certain
this is the issue, and it may impact more than just the one platform if
that "empty_attrs" pattern has been repeated anywhere else in the
kernel.
I also took some time to document how to use the helpers a bit better,
and introduce DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE() for cases where all
that matters is group visibility and not per attribute visibility.
[1]: http://lore.kernel.org/r/b93ec9c2-23f5-486b-a3dc-ed9b960df359@linux.intel.com
---
Dan Williams (3):
sysfs: Fix crash on empty group attributes array
sysfs: Document new "group visible" helpers
sysfs: Introduce DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE()
fs/sysfs/group.c | 4 +-
include/linux/sysfs.h | 85 +++++++++++++++++++++++++++++++++++++++++++++++--
2 files changed, 84 insertions(+), 5 deletions(-)
base-commit: 70317fd24b419091aa0a6dc3ea3ec7bb50c37c32
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