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Aaron Thompson f31dcb152a sched/clock: Fix local_clock() before sched_clock_init() Have local_clock() return sched_clock() if sched_clock_init() has not yet run. sched_clock_cpu() has this check but it was not included in the new noinstr implementation of local_clock(). The effect can be seen on x86 with CONFIG_PRINTK_TIME enabled, for instance. scd->clock quickly reaches the value of TICK_NSEC and that value is returned until sched_clock_init() runs. dmesg without this patch: [ 0.000000] kvm-clock: ... [ 0.000002] kvm-clock: ... [ 0.000672] clocksource: ... [ 0.001000] tsc: ... [ 0.001000] e820: ... [ 0.001000] e820: ... ... [ 0.001000] ..TIMER: ... [ 0.001000] clocksource: ... [ 0.378956] Calibrating delay loop ... [ 0.379955] pid_max: ... dmesg with this patch: [ 0.000000] kvm-clock: ... [ 0.000001] kvm-clock: ... [ 0.000675] clocksource: ... [ 0.002685] tsc: ... [ 0.003331] e820: ... [ 0.004190] e820: ... ... [ 0.421939] ..TIMER: ... [ 0.422842] clocksource: ... [ 0.424582] Calibrating delay loop ... [ 0.425580] pid_max: ... Fixes: `776f22913b` ("sched/clock: Make local_clock() noinstr") Signed-off-by: Aaron Thompson <dev@aaront.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20230413175012.2201-1-dev@aaront.org		2023-04-21 13:24:21 +02:00
arch	- Drop __init annotation from two rtc functions which get called after	2023-04-16 10:28:29 -07:00
block	block: don't set GD_NEED_PART_SCAN if scan partition failed	2023-04-06 20:41:53 -06:00
certs	Kbuild updates for v6.3	2023-02-26 11:53:25 -08:00
crypto	asymmetric_keys: log on fatal failures in PE/pkcs7	2023-03-21 16:23:56 +00:00
Documentation	Linux 6.3-rc7	2023-04-21 13:24:18 +02:00
drivers	Linux 6.3-rc7	2023-04-21 13:24:18 +02:00
fs	smb311 server preauth integrity negotiate context parsing fix	2023-04-16 09:39:55 -07:00
include	sched: Fix performance regression introduced by mm_cid	2023-04-21 13:24:20 +02:00
init	init/initramfs: Fix argument forwarding to panic() in panic_show_mem()	2023-04-16 17:37:01 +09:00
io_uring	io_uring-6.3-2023-04-14	2023-04-15 10:29:53 -07:00
ipc	Merge branch 'work.namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2023-02-24 19:20:07 -08:00
kernel	sched/clock: Fix local_clock() before sched_clock_init()	2023-04-21 13:24:21 +02:00
lib	maple_tree: fix a potential concurrency bug in RCU mode	2023-04-05 18:06:25 -07:00
LICENSES	LICENSES: Add the copyleft-next-0.3.1 license	2022-11-08 15:44:01 +01:00
mm	mm/swap: fix swap_info_struct race between swapoff and get_swap_pages()	2023-04-05 18:06:24 -07:00
net	Including fixes from bpf, and bluetooth.	2023-04-13 15:33:04 -07:00
rust	Rust fixes for 6.3-rc1	2023-03-03 14:51:15 -08:00
samples	LoongArch changes for v6.3	2023-03-01 09:27:00 -08:00
scripts	kbuild: do not create intermediate *.tar for tar packages	2023-04-16 17:38:41 +09:00
security	keys: Do not cache key in task struct if key is requested from kernel thread	2023-03-21 16:22:40 +00:00
sound	ALSA: hda/hdmi: disable KAE for Intel DG2	2023-04-14 07:50:52 +02:00
tools	Including fixes from bpf, and bluetooth.	2023-04-13 15:33:04 -07:00
usr	initramfs: Check negative timestamp to prevent broken cpio archive	2023-04-16 17:37:01 +09:00
virt	KVM: PPC: Make KVM_CAP_IRQFD_RESAMPLE platform dependent	2023-03-31 11:19:05 -04:00
.clang-format	cpumask: re-introduce constant-sized cpumask optimizations	2023-03-05 14:30:34 -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 *.dtso files	2023-02-26 15:28:23 +09:00
.gitignore	kbuild: rpm-pkg: move source components to rpmbuild/SOURCES	2023-03-16 22:45:56 +09:00
.mailmap	mailmap: add an entry for Leonard Crestez	2023-03-28 15:24:32 -07:00
.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	There is no particular theme here - mainly quick hits all over the tree.	2023-02-23 17:55:40 -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	ata changes for 6.3-rc7	2023-04-11 09:51:45 -07:00
Makefile	Linux 6.3-rc7	2023-04-16 15:23:53 -07:00
README

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.