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Bartosz Golaszewski 1016f98b58 irqchip/irq-mtk-sysirq: Replace spinlock with raw_spinlock [ Upstream commit `6eeb997ab5` ] This driver may take a regular spinlock when a raw spinlock (irq_desc->lock) is already taken which results in the following lockdep splat: ============================= [ BUG: Invalid wait context ] 5.7.0-rc7 #1 Not tainted ----------------------------- swapper/0/0 is trying to lock: ffffff800303b798 (&chip_data->lock){....}-{3:3}, at: mtk_sysirq_set_type+0x48/0xc0 other info that might help us debug this: context-{5:5} 2 locks held by swapper/0/0: #0: ffffff800302ee68 (&desc->request_mutex){....}-{4:4}, at: __setup_irq+0xc4/0x8a0 #1: ffffff800302ecf0 (&irq_desc_lock_class){....}-{2:2}, at: __setup_irq+0xe4/0x8a0 stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc7 #1 Hardware name: Pumpkin MT8516 (DT) Call trace: dump_backtrace+0x0/0x180 show_stack+0x14/0x20 dump_stack+0xd0/0x118 __lock_acquire+0x8c8/0x2270 lock_acquire+0xf8/0x470 _raw_spin_lock_irqsave+0x50/0x78 mtk_sysirq_set_type+0x48/0xc0 __irq_set_trigger+0x58/0x170 __setup_irq+0x420/0x8a0 request_threaded_irq+0xd8/0x190 timer_of_init+0x1e8/0x2c4 mtk_gpt_init+0x5c/0x1dc timer_probe+0x74/0xf4 time_init+0x14/0x44 start_kernel+0x394/0x4f0 Replace the spinlock_t with raw_spinlock_t to avoid this warning. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200615074445.3579-1-brgl@bgdev.pl Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-08-19 08:14:52 +02:00
arch	arm64: dts: hisilicon: hikey: fixes to comply with adi, adv7533 DT binding	2020-08-19 08:14:51 +02:00
block	block: release bip in a right way in error path	2020-07-16 08:17:23 +02:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	crypto: af_alg - fix use-after-free in af_alg_accept() due to bh_lock_sock()	2020-07-09 09:37:10 +02:00
Documentation	doc: dt: bindings: usb: dwc3: Update entries for disabling SS instances in park mode	2020-07-22 09:32:04 +02:00
drivers	irqchip/irq-mtk-sysirq: Replace spinlock with raw_spinlock	2020-08-19 08:14:52 +02:00
firmware	Fix built-in early-load Intel microcode alignment	2020-01-23 08:21:29 +01:00
fs	fs/btrfs: Add cond_resched() for try_release_extent_mapping() stalls	2020-08-19 08:14:50 +02:00
include	tracepoint: Mark __tracepoint_string's __used	2020-08-19 08:14:47 +02:00
init	printk: queue wake_up_klogd irq_work only if per-CPU areas are ready	2020-07-22 09:32:13 +02:00
ipc	ipc/util.c: sysvipc_find_ipc() incorrectly updates position index	2020-05-20 08:18:40 +02:00
kernel	sched: correct SD_flags returned by tl->sd_flags()	2020-08-19 08:14:47 +02:00
lib	random32: remove net_rand_state from the latent entropy gcc plugin	2020-08-07 09:36:20 +02:00
LICENSES	LICENSES: Remove CC-BY-SA-4.0 license text	2018-10-18 11:28:50 +02:00
mm	mm: memcg/slab: fix memory leak at non-root kmem_cache destroy	2020-07-29 10:16:57 +02:00
net	Bluetooth: add a mutex lock to avoid UAF in do_enale_set	2020-08-19 08:14:50 +02:00
samples	samples: bpf: Fix build error	2020-06-03 08:19:31 +02:00
scripts	scripts/gdb: fix lx-symbols 'gdb.error' while loading modules	2020-07-29 10:16:51 +02:00
security	Smack: fix use-after-free in smk_write_relabel_self()	2020-08-11 15:32:36 +02:00
sound	ALSA: seq: oss: Serialize ioctls	2020-08-11 15:32:31 +02:00
tools	selftests/net: relax cpu affinity requirement in msg_zerocopy test	2020-08-11 15:32:35 +02:00
usr	initramfs: restore default compression behavior	2020-04-13 10:44:59 +02:00
virt	KVM: arm64: Synchronize sysreg state on injecting an AArch32 exception	2020-06-22 09:05:09 +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	MAINTAINERS: Update drm/i915 bug filing URL	2020-02-28 16:38:49 +01:00
Makefile	Linux 4.19.139	2020-08-11 15:32:36 +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.