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Yanfei Xu 6c2787f2a2 locking: Remove rcu_read_{,un}lock() for preempt_{dis,en}able()

preempt_disable/enable() is equal to RCU read-side crital section, and
the spinning codes in mutex and rwsem could ensure that the preemption
is disabled. So let's remove the unnecessary rcu_read_lock/unlock for
saving some cycles in hot codes.

Signed-off-by: Yanfei Xu <yanfei.xu@windriver.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Link: https://lore.kernel.org/r/20211013134154.1085649-2-yanfei.xu@windriver.com

2021-10-19 17:27:06 +02:00

arch

futex,arm: Wire up sys_futex_waitv()

2021-10-07 13:51:12 +02:00

block

Merge tag 'block-5.15-2021-09-11' of git://git.kernel.dk/linux-block

2021-09-11 10:19:51 -07:00

certs

certs: Add support for using elliptic curve keys for signing modules

2021-08-23 19:55:42 +03:00

crypto

Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2021-08-30 12:57:10 -07:00

Documentation

docs: futex: Fix kernel-doc references

2021-10-19 17:27:05 +02:00

drivers

kernel/locking: Add context to ww_mutex_trylock()

2021-09-17 15:08:41 +02:00

Merge branch 'misc.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2021-09-12 10:43:51 -07:00

include

futex: Implement sys_futex_waitv()

2021-10-07 13:51:11 +02:00

init

Merge tag 'trace-v5.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2021-09-09 13:11:15 -07:00

ipc

Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

2021-09-09 13:25:49 -07:00

kernel

locking: Remove rcu_read_{,un}lock() for preempt_{dis,en}able()

2021-10-19 17:27:06 +02:00

lib

kernel/locking: Add context to ww_mutex_trylock()

2021-09-17 15:08:41 +02:00

LICENSES

LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"

2021-07-15 06:31:24 -06:00

sched: Remove preempt_offset argument from __might_sleep()

2021-10-01 13:57:50 +02:00

net

Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

2021-09-11 14:48:42 -07:00

samples

Merge tag 'kgdb-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux

2021-09-07 12:08:04 -07:00

scripts

Merge tag 'riscv-for-linus-5.15-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2021-09-11 14:29:42 -07:00

security

Merge tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2021-09-03 15:33:47 -07:00

sound

Merge tag 'sound-fix-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

2021-09-09 16:05:10 -07:00

tools

selftests: futex: Test sys_futex_waitv() wouldblock

2021-10-07 13:51:12 +02:00

usr

.gitignore: prefix local generated files with a slash

2021-05-02 00:43:35 +09:00

virt

KVM: Drop unused kvm_dirty_gfn_invalid()

2021-09-06 08:23:46 -04:00

.clang-format

clang-format: Update with the latest for_each macro list

2021-05-12 23:32:39 +02:00

.cocciconfig

…

.get_maintainer.ignore

Opt out of scripts/get_maintainer.pl

2019-05-16 10:53:40 -07:00

.gitattributes

.gitattributes: use 'dts' diff driver for dts files

2019-12-04 19:44:11 -08:00

.gitignore

.gitignore: ignore only top-level modules.builtin

2021-05-02 00:43:35 +09:00

.mailmap

mailmap: update email address of Matthias Fuchs and Thomas Körper

2021-08-19 09:39:44 +02:00

COPYING

COPYING: state that all contributions really are covered by this file

2020-02-10 13:32:20 -08:00

CREDITS

MAINTAINERS: move Murali Karicheri to credits

2021-04-29 15:47:30 -07:00

Kbuild

kbuild: rename hostprogs-y/always to hostprogs/always-y

2020-02-04 01:53:07 +09:00

Kconfig

kbuild: ensure full rebuild when the compiler is updated

2020-05-12 13:28:33 +09:00

MAINTAINERS

futex: Implement sys_futex_waitv()

2021-10-07 13:51:11 +02:00

Makefile

Linux 5.15-rc1

2021-09-12 16:28:37 -07:00

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.