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A mirror of the official Linux kernel repository just in case
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Tejun Heo fd0a68a233 workqueue, irq_work: Build fix for !CONFIG_IRQ_WORK 
2f34d7337d ("workqueue: Fix queue_work_on() with BH workqueues") added
irq_work usage to workqueue; however, it turns out irq_work is actually
optional and the change breaks build on configuration which doesn't have
CONFIG_IRQ_WORK enabled.

Fix build by making workqueue use irq_work only when CONFIG_SMP and enabling
CONFIG_IRQ_WORK when CONFIG_SMP is set. It's reasonable to argue that it may
be better to just always enable it. However, this still saves a small bit of
memory for tiny UP configs and also the least amount of change, so, for now,
let's keep it conditional.

Verified to do the right thing for x86_64 allnoconfig and defconfig, and
aarch64 allnoconfig, allnoconfig + prink disable (SMP but nothing selects
IRQ_WORK) and a modified aarch64 Kconfig where !SMP and nothing selects
IRQ_WORK.

v2: `depends on SMP` leads to Kconfig warnings when CONFIG_IRQ_WORK is
    selected by something else when !CONFIG_SMP. Use `def_bool y if SMP`
    instead.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Fixes: 2f34d7337d ("workqueue: Fix queue_work_on() with BH workqueues")
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
2024-02-16 06:33:43 -10:00
arch fbdev fixes and cleanups for 6.8-rc1: 2024-01-12 14:38:08 -08:00
block for-6.8/block-2024-01-08 2024-01-11 13:58:04 -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 workqueue: Don't implicitly make UNBOUND workqueues w/ @max_active==1 ordered 2024-02-05 14:19:10 -10:00
drivers Devicetree for v6.8: 2024-01-12 15:05:30 -08:00
fs Description for this pull request: 2024-01-12 18:05:56 -08:00
include async: Use a dedicated unbound workqueue with raised min_active 2024-02-09 11:13:59 -10:00
init workqueue, irq_work: Build fix for !CONFIG_IRQ_WORK 2024-02-16 06:33:43 -10:00
io_uring for-6.8/io_uring-2024-01-08 2024-01-11 14:19:23 -08:00
ipc shm: Slim down dependencies 2023-12-20 19:26:31 -05:00
kernel workqueue, irq_work: Build fix for !CONFIG_IRQ_WORK 2024-02-16 06:33:43 -10:00
lib Networking changes for 6.8. 2024-01-11 10:07:29 -08:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm Networking changes for 6.8. 2024-01-11 10:07:29 -08:00
net for-6.8/io_uring-2024-01-08 2024-01-11 14:19:23 -08:00
rust workqueue: rust: sync with WORK_CPU_UNBOUND change 2024-02-01 09:26:00 -10:00
samples media updates for v6.8-rc1 2024-01-12 14:29:48 -08:00
scripts Another moderately busy cycle for documentation, including: 2024-01-11 19:46:52 -08:00
security misc cleanups (the part that hadn't been picked by individual fs trees) 2024-01-11 20:23:50 -08:00
sound sound updates for 6.8-rc1 2024-01-12 11:55:28 -08:00
tools workqueue: Implement BH workqueues to eventually replace tasklets 2024-02-04 11:28:06 -10:00
usr usr/Kconfig: fix typos of "its" 2023-12-20 15:02:58 -08:00
virt vfs-6.8.misc 2024-01-08 10:26:08 -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
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: rpm-pkg: generate kernel.spec in rpmbuild/SPECS/ 2023-10-03 20:49:09 +09:00
.mailmap Networking changes for 6.8. 2024-01-11 10:07:29 -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 Another moderately busy cycle for documentation, including: 2024-01-11 19:46:52 -08:00
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 pwm: Changes for v6.8-rc1 2024-01-12 14:59:50 -08:00
Makefile Quite a lot of kexec work this time around. Many singleton patches in 2024-01-09 11:46:20 -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.