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Jean-Philippe Brucker cdee3f5351 firmware/psci: psci_checker: Park kthreads before stopping them [ Upstream commit `92e074acf6` ] Since commit `85f1abe001` ("kthread, sched/wait: Fix kthread_parkme() completion issue"), kthreads that are bound to a CPU must be parked before being stopped. At the moment the PSCI checker calls kthread_stop() directly on the suspend kthread, which triggers the following warning: [ 6.068288] WARNING: CPU: 1 PID: 1 at kernel/kthread.c:398 __kthread_bind_mask+0x20/0x78 ... [ 6.190151] Call trace: [ 6.192566] __kthread_bind_mask+0x20/0x78 [ 6.196615] kthread_unpark+0x74/0x80 [ 6.200235] kthread_stop+0x44/0x1d8 [ 6.203769] psci_checker+0x3bc/0x484 [ 6.207389] do_one_initcall+0x48/0x260 [ 6.211180] kernel_init_freeable+0x2c8/0x368 [ 6.215488] kernel_init+0x10/0x100 [ 6.218935] ret_from_fork+0x10/0x1c [ 6.222467] ---[ end trace e05e22863d043cd3 ]--- kthread_unpark() tries to bind the thread to its CPU and aborts with a WARN() if the thread wasn't in TASK_PARKED state. Park the kthreads before stopping them. Fixes: `85f1abe001` ("kthread, sched/wait: Fix kthread_parkme() completion issue") Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-08-06 19:06:48 +02:00
arch	arm64: dts: rockchip: fix isp iommu clocks and power domain	2019-08-06 19:06:47 +02:00
block	block, scsi: Change the preempt-only flag into a counter	2019-08-04 09:30:57 +02:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	crypto: chacha20poly1305 - fix atomic sleep when using async algorithm	2019-07-26 09:14:19 +02:00
Documentation	dt-bindings: allow up to four clocks for orion-mdio	2019-07-26 09:14:30 +02:00
drivers	firmware/psci: psci_checker: Park kthreads before stopping them	2019-08-06 19:06:48 +02:00
firmware	kbuild: remove all dummy assignments to obj-	2017-11-18 11:46:06 +09:00
fs	ceph: hold i_ceph_lock when removing caps for freeing inode	2019-08-04 09:30:57 +02:00
include	block, scsi: Change the preempt-only flag into a counter	2019-08-04 09:30:57 +02:00
init	initramfs: free initrd memory if opening /initrd.image fails	2019-06-15 11:54:01 +02:00
ipc	ipc: prevent lockup on alloc_msg and free_msg	2019-06-15 11:54:00 +02:00
kernel	kernel/module.c: Only return -EEXIST for modules that have finished loading	2019-08-06 19:06:47 +02:00
lib	lib/scatterlist: Fix mapping iterator when sg->offset is greater than PAGE_SIZE	2019-07-26 09:14:23 +02:00
LICENSES	LICENSES: Remove CC-BY-SA-4.0 license text	2018-10-18 11:28:50 +02:00
mm	mm: use down_read_killable for locking mmap_sem in access_remote_vm	2019-07-31 07:27:09 +02:00
net	ip_tunnel: allow not to count pkts on tstats by setting skb's dev to NULL	2019-08-04 09:30:57 +02:00
samples	samples, bpf: suppress compiler warning	2019-07-14 08:11:04 +02:00
scripts	kallsyms: exclude kasan local symbols on s390	2019-07-31 07:27:05 +02:00
security	selinux: fix empty write to keycreate file	2019-07-26 09:14:07 +02:00
sound	ALSA: hda - Add a conexant codec entry to let mute led work	2019-07-31 07:27:11 +02:00
tools	perf hists browser: Fix potential NULL pointer dereference found by the smatch tool	2019-07-31 07:27:06 +02:00
usr	initramfs: move gen_initramfs_list.sh from scripts/ to usr/	2018-08-22 23:21:44 +09:00
virt	KVM: arm/arm64: vgic: Fix kvm_device leak in vgic_its_destroy	2019-07-14 08:11:10 +02:00
.clang-format	clang-format: Set IndentWrappedFunctionNames false	2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	Kbuild updates for v4.17 (2nd)	2018-04-15 17:21:30 -07:00
.mailmap	libnvdimm-for-4.19_misc	2018-08-25 18:13:10 -07:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	9p: remove Ron Minnich from MAINTAINERS	2018-08-17 16:20:26 -07:00
Kbuild	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Kconfig	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
MAINTAINERS	platform/x86: Add Intel AtomISP2 dummy / power-management driver	2019-04-20 09:16:02 +02:00
Makefile	Linux 4.19.64	2019-08-04 09:30:58 +02:00
README	Docs: Added a pointer to the formatted docs to README	2018-03-21 09:02:53 -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.
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.