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Randy Dunlap 937238f125 x86: Fix return value of __setup handlers 
[ Upstream commit 12441ccdf5 ]

__setup() handlers should return 1 to obsolete_checksetup() in
init/main.c to indicate that the boot option has been handled. A return
of 0 causes the boot option/value to be listed as an Unknown kernel
parameter and added to init's (limited) argument (no '=') or environment
(with '=') strings. So return 1 from these x86 __setup handlers.

Examples:

  Unknown kernel command line parameters "apicpmtimer
    BOOT_IMAGE=/boot/bzImage-517rc8 vdso=1 ring3mwait=disable", will be
    passed to user space.

  Run /sbin/init as init process
   with arguments:
     /sbin/init
     apicpmtimer
   with environment:
     HOME=/
     TERM=linux
     BOOT_IMAGE=/boot/bzImage-517rc8
     vdso=1
     ring3mwait=disable

Fixes: 2aae950b21 ("x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu")
Fixes: 77b52b4c5c ("x86: add "debugpat" boot option")
Fixes: e16fd002af ("x86/cpufeature: Enable RING3MWAIT for Knights Landing")
Fixes: b8ce335906 ("x86_64: convert to clock events")
Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
Link: https://lore.kernel.org/r/20220314012725.26661-1-rdunlap@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-04-19 17:49:39 +08:00
arch x86: Fix return value of __setup handlers 2023-04-19 17:49:39 +08:00
block iocost: don't reset the inuse weight of under-weighted debtors 2023-04-19 17:48:22 +08:00
certs certs: Add support for using elliptic curve keys for signing modules 2021-08-23 19:55:42 +03:00
crypto crypto: ecrdsa - Fix incorrect use of vli_cmp 2023-04-19 17:49:16 +08:00
Documentation sched/psi: report zeroes for CPU full at the system level 2023-04-19 17:49:35 +08:00
drivers virtio_blk: fix the discard_granularity and discard_alignment queue limits 2023-04-19 17:49:39 +08:00
fs fsnotify: fix wrong lockdep annotations 2023-04-19 17:49:36 +08:00
include x86/speculation: Add missing prototype for unpriv_ebpf_notify() 2023-04-19 17:49:38 +08:00
init random: handle latent entropy and command line from random_init() 2023-04-19 17:49:12 +08:00
ipc ipc/sem: do not sleep with a spin lock held 2023-04-19 17:45:01 +08:00
kernel printk: wake waiters for safe and NMI contexts 2023-04-19 17:49:36 +08:00
lib kunit: fix debugfs code to use enum kunit_status, not bool 2023-04-19 17:49:39 +08:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm zsmalloc: fix races between asynchronous zspage free and page migration 2023-04-19 17:49:16 +08:00
net nl80211: don't hold RTNL in color change request 2023-04-19 17:49:39 +08:00
samples x86: Prepare inline-asm for straight-line-speculation 2023-04-19 17:48:43 +08:00
scripts x86: Add straight-line-speculation mitigation 2023-04-19 17:48:43 +08:00
security lockdown: also lock down previous kgdb use 2023-04-19 17:49:02 +08:00
sound ASoC: rk3328: fix disabling mclk on pclk probe failure 2023-04-19 17:49:38 +08:00
tools perf tools: Use Python devtools for version autodetection rather than runtime 2023-04-19 17:49:39 +08:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2023-04-19 17:44:58 +08:00
virt KVM: avoid NULL pointer dereference in kvm_dirty_ring_push 2023-04-19 17:47:52 +08:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.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: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
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 MAINTAINERS: add git tree for random.c 2023-04-19 17:49:03 +08:00
Makefile Linux 5.15.45 2023-04-19 17:49:18 +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.