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Linux mainline fork with MSM8998 patches | https://mainline.space | Currently supported devices: OnePlus 5/5T, Xiaomi Mi 6, F(x)tec Pro¹ (2019 QX1000 model) & Sony Xperia XZ Premium (UNTESTED!)
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Lorenzo Bianconi 481fc927c8 mt76: mt7921: add rcu section in mt7921_mcu_tx_rate_report 
Introduce rcu section in mt7921_mcu_tx_rate_report before dereferencing
wcid pointer otherwise loockdep will report the following issue:

[  115.245740] =============================
[  115.245754] WARNING: suspicious RCU usage
[  115.245771] 5.10.20 #0 Not tainted
[  115.245784] -----------------------------
[  115.245816] other info that might help us debug this:
[  115.245830] rcu_scheduler_active = 2, debug_locks = 1
[  115.245845] 3 locks held by kworker/u4:1/20:
[  115.245858]  #0: ffffff80065ab138 ((wq_completion)phy0){+.+.}-{0:0}, at: process_one_work+0x1f8/0x6b8
[  115.245948]  #1: ffffffc01198bdd8 ((work_completion)(&(&dev->mphy.mac_work)->work)){+.+.}-{0:0}, at: process_one_8
[  115.246027]  #2: ffffff8006543ce8 (&dev->mutex#2){+.+.}-{3:3}, at: mt7921_mac_work+0x60/0x2b0 [mt7921e]
[  115.246125]
[  115.246125] stack backtrace:
[  115.246142] CPU: 1 PID: 20 Comm: kworker/u4:1 Not tainted 5.10.20 #0
[  115.246152] Hardware name: MediaTek MT7622 RFB1 board (DT)
[  115.246168] Workqueue: phy0 mt7921_mac_work [mt7921e]
[  115.246188] Call trace:
[  115.246201]  dump_backtrace+0x0/0x1a8
[  115.246213]  show_stack+0x14/0x30
[  115.246228]  dump_stack+0xec/0x134
[  115.246240]  lockdep_rcu_suspicious+0xcc/0xdc
[  115.246255]  mt7921_get_wtbl_info+0x2a4/0x310 [mt7921e]
[  115.246269]  mt7921_mac_work+0x284/0x2b0 [mt7921e]
[  115.246281]  process_one_work+0x2a0/0x6b8
[  115.246293]  worker_thread+0x40/0x440
[  115.246305]  kthread+0x144/0x148
[  115.246317]  ret_from_fork+0x10/0x18

Fixes: 1c099ab447 ("mt76: mt7921: add MCU support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-12 23:11:21 +02:00
arch Merge git://git.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2021-03-09 17:15:56 -08:00
block block/bfq: update comments and default value in docs for fifo_expire 2021-03-02 11:25:38 -07:00
certs certs: Replace K{U,G}IDT_INIT() with GLOBAL_ROOT_{U,G}ID 2021-01-21 16:16:10 +00:00
crypto crypto: mips/poly1305 - enable for all MIPS processors 2021-03-08 11:52:17 +01:00
Documentation dt-bindings:net:wireless:mediatek,mt76: txt to yaml conversion 2021-04-12 00:03:05 +02:00
drivers mt76: mt7921: add rcu section in mt7921_mcu_tx_rate_report 2021-04-12 23:11:21 +02:00
fs pstore fixes for v5.12-rc2 2021-03-05 17:21:25 -08:00
include psample: Add additional metadata attributes 2021-03-14 15:00:43 -07:00
init Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-03-09 18:07:05 -08:00
ipc fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-03-09 18:07:05 -08:00
lib Merge git://git.kernel.org:/pub/scm/linux/kernel/git/davem/sparc 2021-03-08 22:01:58 -08:00
LICENSES LICENSES: Add the CC-BY-4.0 license 2020-12-08 10:33:27 -07:00
mm swap: fix swapfile read/write offset 2021-03-02 17:25:46 -07:00
net psample: Add additional metadata attributes 2021-03-14 15:00:43 -07:00
samples samples: pktgen: new append mode 2021-03-14 14:22:38 -07:00
scripts Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-03-09 18:07:05 -08:00
security nexthop: Add netlink defines and enumerators for resilient NH groups 2021-03-11 16:12:59 -08:00
sound ALSA: hda/realtek: Apply dual codec quirks for MSI Godlike X570 board 2021-03-03 15:25:03 +01:00
tools selftests: mlxsw: Add tc sample tests 2021-03-14 15:00:44 -07:00
usr Kbuild updates for v5.12 2021-02-25 10:17:31 -08:00
virt KVM: x86/mmu: Consider the hva in mmu_notifier retry 2021-02-22 13:16:53 -05:00
.clang-format cxl for 5.12 2021-02-24 09:38:36 -08:00
.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 clang-lto series for v5.12-rc1 2021-02-23 09:28:51 -08:00
.mailmap treewide: Miguel has moved 2021-02-26 09:41:03 -08:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS treewide: Miguel has moved 2021-02-26 09:41:03 -08:00
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 staging: dpaa2-switch: move the driver out of staging 2021-03-10 13:30:36 -08:00
Makefile Linux 5.12-rc2 2021-03-05 17:33:41 -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.