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A mirror of the official Linux kernel repository just in case
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Adrian Huang b0907cadab md: fix incorrect declaration about claim_rdev in md_import_device 
Commit fb541ca4c3 ("md: remove lock_bdev / unlock_bdev") removes
wrappers for blkdev_get/blkdev_put. However, the uninitialized local
static variable of pointer type 'claim_rdev' in md_import_device()
is NULL, which leads to the following warning call trace:

  WARNING: CPU: 22 PID: 1037 at block/bdev.c:577 bd_prepare_to_claim+0x131/0x150
  CPU: 22 PID: 1037 Comm: mdadm Not tainted 6.2.0-rc3+ #69
  ..
  RIP: 0010:bd_prepare_to_claim+0x131/0x150
  ..
  Call Trace:
   <TASK>
   ? _raw_spin_unlock+0x15/0x30
   ? iput+0x6a/0x220
   blkdev_get_by_dev.part.0+0x4b/0x300
   md_import_device+0x126/0x1d0
   new_dev_store+0x184/0x240
   md_attr_store+0x80/0xf0
   kernfs_fop_write_iter+0x128/0x1c0
   vfs_write+0x2be/0x3c0
   ksys_write+0x5f/0xe0
   do_syscall_64+0x38/0x90
   entry_SYSCALL_64_after_hwframe+0x72/0xdc

It turns out the md device cannot be used:

  md: could not open device unknown-block(259,0).
  md: md127 stopped.

Fix the issue by declaring the local static variable of struct type
and passing the pointer of the variable to blkdev_get_by_dev().

Fixes: fb541ca4c3 ("md: remove lock_bdev / unlock_bdev")
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Adrian Huang <ahuang12@lenovo.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <song@kernel.org>
2023-01-12 10:42:16 -08:00
arch MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
block block: Drop spurious might_sleep() from blk_put_queue() 2023-01-08 20:29:28 -07:00
certs certs: make system keyring depend on built-in x509 parser 2022-09-24 04:31:18 +09:00
crypto iov_iter work; most of that is about getting rid of 2022-12-12 18:29:54 -08:00
Documentation Revert "pktcdvd: remove driver." 2023-01-04 14:44:13 -07:00
drivers md: fix incorrect declaration about claim_rdev in md_import_device 2023-01-12 10:42:16 -08:00
fs MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
include Revert "pktcdvd: remove driver." 2023-01-04 14:44:13 -07:00
init modules changes for v6.2-rc1 2022-12-13 14:05:39 -08:00
io_uring for-6.2/block-2022-12-08 2022-12-13 10:43:59 -08:00
ipc Non-MM patches for 6.2-rc1. 2022-12-12 17:28:58 -08:00
kernel MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
lib MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
net Networking changes for 6.2. 2022-12-13 15:47:48 -08:00
rust rust: types: add Opaque type 2022-12-04 01:59:16 +01:00
samples Networking changes for 6.2. 2022-12-13 15:47:48 -08:00
scripts Networking changes for 6.2. 2022-12-13 15:47:48 -08:00
security integrity-v6.2 2022-12-13 14:22:50 -08:00
sound sound updates for 6.2-rc1 2022-12-13 11:27:26 -08:00
tools MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt Merge branch 'kvm-dwmw2-fixes' into HEAD 2022-11-23 18:59:45 -05:00
.clang-format printk changes for 6.2 2022-12-12 09:01:36 -08:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore kbuild: Cleanup DT Overlay intermediate files as appropriate 2022-11-18 14:45:30 -06:00
.mailmap Non-MM patches for 6.2-rc1. 2022-12-12 17:28:58 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove Michal Marek from Kbuild maintainers 2022-11-16 14:53:00 +09:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: stop nvme matching for nvmem files 2023-01-10 08:16:39 +01:00
Makefile This was a not-too-busy cycle for documentation; highlights include: 2022-12-12 17:18:50 -08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.