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Randy Dunlap 9727c3165b mm/memcontrol: return 1 from cgroup.memory __setup() handler 
commit 460a79e188 upstream.

__setup() handlers should return 1 if the command line option is handled
and 0 if not (or maybe never return 0; it just pollutes init's
environment).

The only reason that this particular __setup handler does not pollute
init's environment is that the setup string contains a '.', as in
"cgroup.memory".  This causes init/main.c::unknown_boottoption() to
consider it to be an "Unused module parameter" and ignore it.  (This is
for parsing of loadable module parameters any time after kernel init.)
Otherwise the string "cgroup.memory=whatever" would be added to init's
environment strings.

Instead of relying on this '.' quirk, just return 1 to indicate that the
boot option has been handled.

Note that there is no warning message if someone enters:
	cgroup.memory=anything_invalid

Link: https://lkml.kernel.org/r/20220222005811.10672-1-rdunlap@infradead.org
Fixes: f7e1cb6ec5 ("mm: memcontrol: account socket memory in unified hierarchy memory controller")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-15 14:14:59 +02:00
arch KVM: x86: fix sending PV IPI 2022-04-15 14:14:58 +02:00
block Revert "Revert "block, bfq: honor already-setup queue merges"" 2022-04-15 14:14:54 +02:00
certs certs: Trigger creation of RSA module signing key if it's not an RSA key 2021-09-22 11:47:51 +02:00
crypto crypto: authenc - Fix sleep in atomic context in decrypt_tail 2022-04-15 14:14:42 +02:00
Documentation Documentation: update stable tree link 2022-04-15 14:14:38 +02:00
drivers ACPI: CPPC: Avoid out of bounds access when parsing _CPC data 2022-04-15 14:14:59 +02:00
firmware Fix built-in early-load Intel microcode alignment 2020-01-23 08:21:29 +01:00
fs gfs2: Make sure FITRIM minlen is rounded up to fs block size 2022-04-15 14:14:58 +02:00
include PCI: Reduce warnings on possible RW1C corruption 2022-04-15 14:14:50 +02:00
init kbuild: add CONFIG_LD_IS_LLD 2022-03-11 10:15:12 +01:00
ipc shm: extend forced shm destroy to support objects from several IPC nses 2021-12-08 08:50:11 +01:00
kernel dma-debug: fix return value of __setup handlers 2022-04-15 14:14:51 +02:00
lib lib/raid6/test/Makefile: Use $(pound) instead of \# for Make 4.3 2022-04-15 14:14:54 +02:00
LICENSES
mm mm/memcontrol: return 1 from cgroup.memory __setup() handler 2022-04-15 14:14:59 +02:00
net net/x25: Fix null-ptr-deref caused by x25_disconnect 2022-04-15 14:14:53 +02:00
samples samples/kretprobes: Fix return value if register_kretprobe() failed 2021-11-26 11:36:11 +01:00
scripts kconfig: let 'shell' return enough output for deep path names 2022-02-23 11:58:42 +01:00
security Fix incorrect type in assignment of ipv6 port for audit 2022-04-15 14:14:54 +02:00
sound ASoC: soc-core: skip zero num_dai component in searching dai name 2022-04-15 14:14:56 +02:00
tools selftests/bpf/test_lirc_mode2.sh: Exit with proper code 2022-04-15 14:14:50 +02:00
usr initramfs: restore default compression behavior 2020-04-13 10:44:59 +02:00
virt KVM: Prevent module exit until all VMs are freed 2022-04-15 14:14:57 +02:00
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MAINTAINERS Documentation/llvm: add documentation on building w/ Clang/LLVM 2020-09-26 18:01:31 +02:00
Makefile Linux 4.19.237 2022-03-28 08:41:44 +02:00
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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.