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Linus Torvalds 1fab45ab6e RCU pull request for v6.2 
This pull request contains the following branches:
 
 doc.2022.10.20a: Documentation updates.  This is the second
 	in a series from an ongoing review of the RCU documentation.
 
 fixes.2022.10.21a: Miscellaneous fixes.
 
 lazy.2022.11.30a: Introduces a default-off Kconfig option that depends
 	on RCU_NOCB_CPU that, on CPUs mentioned in the nohz_full or
 	rcu_nocbs boot-argument CPU lists, causes call_rcu() to introduce
 	delays.  These delays result in significant power savings on
 	nearly idle Android and ChromeOS systems.  These savings range
 	from a few percent to more than ten percent.
 
 	This series also includes several commits that change call_rcu()
 	to a new call_rcu_hurry() function that avoids these delays in
 	a few cases, for example, where timely wakeups are required.
 	Several of these are outside of RCU and thus have acks and
 	reviews from the relevant maintainers.
 
 srcunmisafe.2022.11.09a: Creates an srcu_read_lock_nmisafe() and an
 	srcu_read_unlock_nmisafe() for architectures that support NMIs,
 	but which do not provide NMI-safe this_cpu_inc().  These NMI-safe
 	SRCU functions are required by the upcoming lockless printk()
 	work by John Ogness et al.
 
 	That printk() series depends on these commits, so if you pull
 	the printk() series before this one, you will have already
 	pulled in this branch, plus two more SRCU commits:
 
 	0cd7e350ab ("rcu: Make SRCU mandatory")
 	51f5f78a4f ("srcu: Make Tiny synchronize_srcu() check for readers")
 
 	These two commits appear to work well, but do not have
 	sufficient testing exposure over a long enough time for me to
 	feel comfortable pushing them unless something in mainline is
 	definitely going to use them immediately, and currently only
 	the new printk() work uses them.
 
 torture.2022.10.18c: Changes providing minor but important increases
 	in test coverage for the new RCU polled-grace-period APIs.
 
 torturescript.2022.10.20a: Changes that avoid redundant kernel builds,
 	thus providing about a 30% speedup for the torture.sh acceptance
 	test.
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Merge tag 'rcu.2022.12.02a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu

Pull RCU updates from Paul McKenney:

 - Documentation updates. This is the second in a series from an ongoing
   review of the RCU documentation.

 - Miscellaneous fixes.

 - Introduce a default-off Kconfig option that depends on RCU_NOCB_CPU
   that, on CPUs mentioned in the nohz_full or rcu_nocbs boot-argument
   CPU lists, causes call_rcu() to introduce delays.

   These delays result in significant power savings on nearly idle
   Android and ChromeOS systems. These savings range from a few percent
   to more than ten percent.

   This series also includes several commits that change call_rcu() to a
   new call_rcu_hurry() function that avoids these delays in a few
   cases, for example, where timely wakeups are required. Several of
   these are outside of RCU and thus have acks and reviews from the
   relevant maintainers.

 - Create an srcu_read_lock_nmisafe() and an srcu_read_unlock_nmisafe()
   for architectures that support NMIs, but which do not provide
   NMI-safe this_cpu_inc(). These NMI-safe SRCU functions are required
   by the upcoming lockless printk() work by John Ogness et al.

 - Changes providing minor but important increases in torture test
   coverage for the new RCU polled-grace-period APIs.

 - Changes to torturescript that avoid redundant kernel builds, thus
   providing about a 30% speedup for the torture.sh acceptance test.

* tag 'rcu.2022.12.02a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (49 commits)
  net: devinet: Reduce refcount before grace period
  net: Use call_rcu_hurry() for dst_release()
  workqueue: Make queue_rcu_work() use call_rcu_hurry()
  percpu-refcount: Use call_rcu_hurry() for atomic switch
  scsi/scsi_error: Use call_rcu_hurry() instead of call_rcu()
  rcu/rcutorture: Use call_rcu_hurry() where needed
  rcu/rcuscale: Use call_rcu_hurry() for async reader test
  rcu/sync: Use call_rcu_hurry() instead of call_rcu
  rcuscale: Add laziness and kfree tests
  rcu: Shrinker for lazy rcu
  rcu: Refactor code a bit in rcu_nocb_do_flush_bypass()
  rcu: Make call_rcu() lazy to save power
  rcu: Implement lockdep_rcu_enabled for !CONFIG_DEBUG_LOCK_ALLOC
  srcu: Debug NMI safety even on archs that don't require it
  srcu: Explain the reason behind the read side critical section on GP start
  srcu: Warn when NMI-unsafe API is used in NMI
  arch/s390: Add ARCH_HAS_NMI_SAFE_THIS_CPU_OPS Kconfig option
  arch/loongarch: Add ARCH_HAS_NMI_SAFE_THIS_CPU_OPS Kconfig option
  rcu: Fix __this_cpu_read() lockdep warning in rcu_force_quiescent_state()
  rcu-tasks: Make grace-period-age message human-readable
  ...
2022-12-12 07:47:15 -08:00
arch RCU pull request for v6.2 2022-12-12 07:47:15 -08:00
block block-6.1-2022-11-25 2022-11-25 17:50:57 -08:00
certs certs: make system keyring depend on built-in x509 parser 2022-09-24 04:31:18 +09:00
crypto treewide: use get_random_bytes() when possible 2022-10-11 17:42:58 -06:00
Documentation RCU pull request for v6.2 2022-12-12 07:47:15 -08:00
drivers RCU pull request for v6.2 2022-12-12 07:47:15 -08:00
fs fscache: Fix oops due to race with cookie_lru and use_cookie 2022-12-07 11:49:18 -08:00
include RCU pull request for v6.2 2022-12-12 07:47:15 -08:00
init init/Kconfig: fix CC_HAS_ASM_GOTO_TIED_OUTPUT test with dash 2022-11-22 22:42:38 +09:00
io_uring io_uring: Fix a null-ptr-deref in io_tctx_exit_cb() 2022-12-07 06:45:20 -07:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2022-12-05 10:54:44 -08:00
kernel RCU pull request for v6.2 2022-12-12 07:47:15 -08:00
lib RCU pull request for v6.2 2022-12-12 07:47:15 -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 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
net RCU pull request for v6.2 2022-12-12 07:47:15 -08:00
rust Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
samples VFIO updates for v6.1-rc1 2022-10-12 14:46:48 -07:00
scripts - Handle different output of readelf on different distros running 2022-11-27 12:08:17 -08:00
security lsm/stable-6.1 PR 20221031 2022-10-31 12:09:42 -07:00
sound ASoC: Fixes for v6.1 2022-11-30 17:26:55 +01:00
tools RCU pull request for v6.2 2022-12-12 07:47:15 -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 inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.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: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -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 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
Makefile Linux 6.1 2022-12-11 14:15:18 -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.