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Mikulas Patocka 9f3fe29d77 md: fix a suspicious RCU usage warning RCU protection was removed in the commit `2d32777d60` ("raid1: remove rcu protection to access rdev from conf"). However, the code in fix_read_error does rcu_dereference outside rcu_read_lock - this triggers the following warning. The warning is triggered by a LVM2 test shell/integrity-caching.sh. This commit removes rcu_dereference. ============================= WARNING: suspicious RCU usage 6.7.0 #2 Not tainted ----------------------------- drivers/md/raid1.c:2265 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 no locks held by mdX_raid1/1859. stack backtrace: CPU: 2 PID: 1859 Comm: mdX_raid1 Not tainted 6.7.0 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x60/0x70 lockdep_rcu_suspicious+0x153/0x1b0 raid1d+0x1732/0x1750 [raid1] ? lock_acquire+0x9f/0x270 ? finish_wait+0x3d/0x80 ? md_thread+0xf7/0x130 [md_mod] ? lock_release+0xaa/0x230 ? md_register_thread+0xd0/0xd0 [md_mod] md_thread+0xa0/0x130 [md_mod] ? housekeeping_test_cpu+0x30/0x30 kthread+0xdc/0x110 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x28/0x40 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork_asm+0x11/0x20 </TASK> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Fixes: `ca294b34aa` ("md/raid1: support read error check") Reviewed-by: Yu Kuai <yukuai3@huawei.com> Signed-off-by: Song Liu <song@kernel.org> Link: https://lore.kernel.org/r/51539879-e1ca-fde3-b8b4-8934ddedcbc@redhat.com		2024-01-24 22:58:00 -08:00
arch	powerpc fixes for 6.8 #2	2024-01-21 11:04:29 -08:00
block	for-6.8/block-2024-01-18	2024-01-18 18:22:40 -08:00
certs	This update includes the following changes:	2023-11-02 16:15:30 -10:00
crypto	crypto: scomp - fix req->dst buffer overflow	2023-12-29 11:25:56 +08:00
Documentation	Updates for time and clocksources:	2024-01-21 11:14:40 -08:00
drivers	md: fix a suspicious RCU usage warning	2024-01-24 22:58:00 -08:00
fs	More bcachefs updates for 6.7-rc1	2024-01-21 14:01:12 -08:00
include	header cleanup fixup for 6.8-rc1	2024-01-21 10:21:43 -08:00
init	Driver core changes for 6.8-rc1	2024-01-18 09:48:40 -08:00
io_uring	for-6.8/io_uring-2024-01-18	2024-01-18 18:17:57 -08:00
ipc	shm: Slim down dependencies	2023-12-20 19:26:31 -05:00
kernel	Updates for time and clocksources:	2024-01-21 11:14:40 -08:00
lib	RISC-V Patches for the 6.8 Merge Window, Part 4	2024-01-20 11:06:04 -08:00
LICENSES	LICENSES: Add the copyleft-next-0.3.1 license	2022-11-08 15:44:01 +01:00
mm	vfs-6.8.netfs	2024-01-19 09:10:23 -08:00
net	Assorted CephFS fixes and cleanups with nothing standing out.	2024-01-19 09:58:55 -08:00
rust	Rust changes for v6.8	2024-01-11 13:05:41 -08:00
samples	RISC-V Patches for the 6.8 Merge Window, Part 4	2024-01-20 11:06:04 -08:00
scripts	Coccinelle change for v6.8	2024-01-20 14:20:34 -08:00
security	+ Features	2024-01-19 10:53:55 -08:00
sound	sound fixes for 6.8-rc1	2024-01-19 12:30:29 -08:00
tools	RISC-V Patches for the 6.8 Merge Window, Part 4	2024-01-20 11:06:04 -08:00
usr	Kbuild updates for v6.8	2024-01-18 17:57:07 -08:00
virt	Generic:	2024-01-17 13:03:37 -08:00
.clang-format	clang-format: Update with v6.7-rc4's `for_each` macro list	2023-12-08 23:54:38 +01:00
.cocciconfig
.editorconfig	Add .editorconfig file for basic formatting	2023-12-28 16:22:47 +09:00
.get_maintainer.ignore
.gitattributes	.gitattributes: set diff driver for Rust source code files	2023-05-31 17:48:25 +02:00
.gitignore	Add .editorconfig file for basic formatting	2023-12-28 16:22:47 +09:00
.mailmap	Char/Misc and other Driver changes for 6.8-rc1	2024-01-17 16:47:17 -08:00
.rustfmt.toml	rust: add `.rustfmt.toml`	2022-09-28 09:02:20 +02:00
COPYING
CREDITS	Including fixes from bpf and netfilter.	2024-01-18 17:33:50 -08:00
Kbuild	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Kconfig
MAINTAINERS	Various smb client fixes, including multichannel and for SMB3.1.1 POSIX extensions	2024-01-20 16:48:07 -08:00
Makefile	Linux 6.8-rc1	2024-01-21 14:11:32 -08:00
README

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.