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Linus Torvalds 3a4a0367c9 RCU fix for v6.17 
Fix a regression introduced by commit b41642c877 ("rcu: Fix
 rcu_read_unlock() deadloop due to IRQ work") which results in boot hang
 as reported by kernel test bot at [1]. This issue happens because RCU
 re-initializes the deferred QS IRQ work everytime it is queued. With
 commit b41642c877, the IRQ work re-initialization can happen while it
 is already queued. This results in IRQ work being requeued to itself.
 When IRQ work finally fires, as it is requeued to itself, it is
 repeatedly executed and results in hang. Fix this with initializing the
 IRQ work only once before the CPU boots.
 
 [1] https://lore.kernel.org/rcu/202508071303.c1134cce-lkp@intel.com/
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Merge tag 'rcu.fixes.6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux

Pull RCU fix from Neeraj Upadhyay:
 "Fix a regression introduced by commit b41642c877 ("rcu: Fix
  rcu_read_unlock() deadloop due to IRQ work") which results in boot
  hang as reported by kernel test bot at [1].

  This issue happens because RCU re-initializes the deferred QS IRQ work
  everytime it is queued. With commit b41642c877, the IRQ work
  re-initialization can happen while it is already queued. This results
  in IRQ work being requeued to itself. When IRQ work finally fires, as
  it is requeued to itself, it is repeatedly executed and results in
  hang.

  Fix this with initializing the IRQ work only once before the CPU
  boots"

Link: https://lore.kernel.org/rcu/202508071303.c1134cce-lkp@intel.com/ [1]

* tag 'rcu.fixes.6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux:
  rcu: Fix racy re-initialization of irq_work causing hangs
2025-08-13 10:23:28 -07:00
arch - Add a mitigation for a cache coherency vulnerability when running an 2025-08-12 08:19:23 -07:00
block block-6.17-20250808 2025-08-09 08:47:28 +03:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto Significant patch series in this pull request: 2025-08-03 16:23:09 -07:00
Documentation EFI updates for v6.17 2025-08-09 18:10:01 +03:00
drivers YAUAFFix due to dma_buf_fd() misuse 2025-08-12 12:10:33 -07:00
fs 12 hotfixes. 5 are cc:stable and the remainder address post-6.16 issues 2025-08-13 08:28:33 -07:00
include TTY revert fix for 6.16-rc1 2025-08-09 18:12:23 +03:00
init Significant patch series in this pull request: 2025-08-03 16:23:09 -07:00
io_uring io_uring/memmap: cast nr_pages to size_t before shifting 2025-08-08 06:35:14 -06:00
ipc vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
kernel rcu: Fix racy re-initialization of irq_work causing hangs 2025-08-11 08:43:49 +05:30
lib block-6.17-20250808 2025-08-09 08:47:28 +03:00
LICENSES LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2 2025-07-24 11:15:39 +02:00
mm mm/mremap: avoid expensive folio lookup on mremap folio pte batch 2025-08-11 23:00:59 -07:00
net nfsd-6.17 fixes: 2025-08-11 07:38:55 -07:00
rust Rust changes for v6.17 2025-08-03 13:49:10 -07:00
samples Significant patch series in this pull request: 2025-08-03 16:23:09 -07:00
scripts Kbuild updates for v6.17 2025-08-06 07:32:52 +03:00
security + Features 2025-08-04 08:17:28 -07:00
sound gpio updates for v6.17-rc1 2025-08-09 08:15:43 +03:00
tools 12 hotfixes. 5 are cc:stable and the remainder address post-6.16 issues 2025-08-13 08:28:33 -07:00
usr usr/include: openrisc: don't HDRTEST bpf_perf_event.h 2025-05-12 15:03:17 +09:00
virt Merge tag 'kvm-x86-no_assignment-6.17' of https://github.com/kvm-x86/linux into HEAD 2025-07-29 08:36:42 -04:00
.clang-format Linux 6.15-rc5 2025-05-06 16:39:25 +10:00
.clippy.toml rust: clean Rust 1.88.0's warning about clippy::disallowed_macros configuration 2025-05-07 00:11:47 +02:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore gitignore: allow .pylintrc to be tracked 2025-07-02 17:10:04 -06:00
.mailmap Significant patch series in this pull request: 2025-08-03 16:23:09 -07:00
.pylintrc docs: add a .pylintrc file with sys path for docs scripts 2025-04-09 12:10:33 -06:00
.rustfmt.toml
COPYING
CREDITS Kbuild updates for v6.17 2025-08-06 07:32:52 +03:00
Kbuild drm: ensure drm headers are self-contained and pass kernel-doc 2025-02-12 10:44:43 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS 12 hotfixes. 5 are cc:stable and the remainder address post-6.16 issues 2025-08-13 08:28:33 -07:00
Makefile Linux 6.17-rc1 2025-08-10 19:41:16 +03:00
README README: Fix spelling 2024-03-18 03:36:32 -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 reStructuredText 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.