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Filename Latest commit message Latest commit date
Paolo Bonzini 1dbb6704de jump_label: Fix concurrent static_key_enable/disable()
static_key_enable/disable are trying to cap the static key count to
0/1.  However, their use of key->enabled is outside jump_label_lock
so they do not really ensure that.

Rewrite them to do a quick check for an already enabled (respectively,
already disabled), and then recheck under the jump label lock.  Unlike
static_key_slow_inc/dec, a failed check under the jump label lock does
not modify key->enabled.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1501601046-35683-2-git-send-email-pbonzini@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-08-10 12:28:56 +02:00
arch locking/atomic: Fix atomic_set_release() for 'funny' architectures 2017-08-10 12:28:54 +02:00
block blk-mq: don't leak preempt counter/q_usage_counter when allocating rq failed 2017-08-02 08:23:57 -06:00
certs
crypto
Documentation Pin control fixes for the v4.13 cycle: 2017-08-09 14:30:34 -07:00
drivers Pin control fixes for the v4.13 cycle: 2017-08-09 14:30:34 -07:00
firmware
fs Changes since last update: 2017-08-07 18:16:22 -07:00
include jump_label: Fix concurrent static_key_enable/disable() 2017-08-10 12:28:56 +02:00
init futex: Allow for compiling out PI support 2017-08-01 14:36:35 +02:00
ipc ipc: add missing container_of()s for randstruct 2017-08-02 17:16:12 -07:00
kernel jump_label: Fix concurrent static_key_enable/disable() 2017-08-10 12:28:56 +02:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-07-31 22:36:42 -07:00
mm Merge branch 'linus' into locking/core, to pick up fixes 2017-08-10 12:20:53 +02:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-09 10:14:04 -07:00
samples samples/bpf: fix bpf tunnel cleanup 2017-07-31 22:02:47 -07:00
scripts parse-maintainers: Move matching sections from MAINTAINERS 2017-08-08 11:16:14 -07:00
security
sound ASoC: Fixes for v4.13 2017-08-02 17:11:45 +02:00
tools bpf: fix selftest/bpf/test_pkt_md_access on s390x 2017-08-07 10:06:27 -07:00
usr
virt KVM/ARM Fixes for v4.13-rc4 2017-08-03 17:59:58 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Pin control fixes for the v4.13 cycle: 2017-08-09 14:30:34 -07:00
Makefile Linux 4.13-rc4 2017-08-06 18:44:49 -07:00
README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

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.