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Filename Latest commit message Latest commit date
Waiman Long ef6eb81213 locking/lockdep: Decrement IRQ context counters when removing lock chain 
[ Upstream commit b3b9c187dc2544923a601733a85352b9ddaba9b3 ]

There are currently three counters to track the IRQ context of a lock
chain - nr_hardirq_chains, nr_softirq_chains and nr_process_chains.
They are incremented when a new lock chain is added, but they are
not decremented when a lock chain is removed. That causes some of the
statistic counts reported by /proc/lockdep_stats to be incorrect.
IRQ
Fix that by decrementing the right counter when a lock chain is removed.

Since inc_chains() no longer accesses hardirq_context and softirq_context
directly, it is moved out from the CONFIG_TRACE_IRQFLAGS conditional
compilation block.

Fixes: a0b0fd53e1 ("locking/lockdep: Free lock classes that are no longer in use")
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20200206152408.24165-2-longman@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 13:17:33 +02:00
arch ARM: 8948/1: Prevent OOB access in stacktrace 2020-10-01 13:17:29 +02:00
block block: only call sched requeue_request() for scheduled requests 2020-09-23 12:40:37 +02:00
certs
crypto
Documentation
drivers drm/omap: fix possible object reference leak 2020-10-01 13:17:33 +02:00
fs nfsd: Fix a perf warning 2020-10-01 13:17:31 +02:00
include skbuff: fix a data race in skb_queue_len() 2020-10-01 13:17:31 +02:00
init
ipc
kernel locking/lockdep: Decrement IRQ context counters when removing lock chain 2020-10-01 13:17:33 +02:00
lib kernel/sysctl-test: Add null pointer test for sysctl.c:proc_dointvec() 2020-10-01 13:17:10 +02:00
LICENSES
mm mm: pagewalk: fix termination condition in walk_pte_range() 2020-10-01 13:17:30 +02:00
net skbuff: fix a data race in skb_queue_len() 2020-10-01 13:17:31 +02:00
samples
scripts checkpatch: fix the usage of capture group ( ... ) 2020-09-09 19:12:37 +02:00
security selinux: sel_avc_get_stat_idx should increase position index 2020-10-01 13:17:32 +02:00
sound ALSA: hda: Clear RIRB status before reading WP 2020-10-01 13:17:31 +02:00
tools tools/power/x86/intel_pstate_tracer: changes for python 3 compatibility 2020-10-01 13:17:30 +02:00
usr
virt KVM: fix overflow of zero page refcount with ksm running 2020-10-01 13:17:31 +02:00
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Makefile Linux 5.4.68 2020-09-26 18:03:16 +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.

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.