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Sebastian Andrzej Siewior fb4a58f519 lockdep: Let lock_is_held_type() detect recursive read as read 
[ Upstream commit 2507003a1d10917c9158077bf6030719d02c941e ]

lock_is_held_type(, 1) detects acquired read locks. It only recognized
locks acquired with lock_acquire_shared(). Read locks acquired with
lock_acquire_shared_recursive() are not recognized because a `2' is
stored as the read value.

Rework the check to additionally recognise lock's read value one and two
as a read held lock.

Fixes: e918188611 ("locking: More accurate annotations for read_lock()")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Boqun Feng <boqun.feng@gmail.com>
Acked-by: Waiman Long <longman@redhat.com>
Link: https://lkml.kernel.org/r/20210903084001.lblecrvz4esl4mrr@linutronix.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-11-18 14:04:02 +01:00
arch MIPS: lantiq: dma: fix burst length for DEU 2021-11-18 14:04:02 +01:00
block block: remove inaccurate requeue check 2021-11-18 14:03:58 +01:00
certs
crypto
Documentation fscrypt: allow 256-bit master keys with AES-256-XTS 2021-11-18 14:03:54 +01:00
drivers virtio-gpu: fix possible memory allocation failure 2021-11-18 14:04:02 +01:00
fs erofs: don't trigger WARN() when decompression fails 2021-11-18 14:04:01 +01:00
include task_stack: Fix end_of_stack() for architectures with upwards-growing stack 2021-11-18 14:04:01 +01:00
init
ipc
kernel lockdep: Let lock_is_held_type() detect recursive read as read 2021-11-18 14:04:02 +01:00
lib lib/xz: Validate the value before assigning it to an enum variable 2021-11-18 14:03:58 +01:00
LICENSES
mm mm: khugepaged: skip huge page collapse for special files 2021-11-06 14:10:09 +01:00
net Bluetooth: fix init and cleanup of sco_conn.timeout_work 2021-11-18 14:04:01 +01:00
samples samples: bpf: Fix tracex7 error raised on the missing argument 2021-09-18 13:40:23 +02:00
scripts leaking_addresses: Always print a trailing newline 2021-11-18 14:03:57 +01:00
security smackfs: use __GFP_NOFAIL for smk_cipso_doi() 2021-11-18 14:03:59 +01:00
sound ALSA: mixer: fix deadlock in snd_mixer_oss_set_volume 2021-11-18 14:03:49 +01:00
tools objtool: Fix static_call list generation 2021-11-18 14:04:02 +01:00
usr
virt KVM: do not shrink halt_poll_ns below grow_start 2021-10-09 14:40:58 +02:00
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Makefile Linux 5.10.79 2021-11-12 14:58:35 +01:00
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.

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.