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Andrea Parri fce095450b sbitmap: fix improper use of smp_mb__before_atomic() 
commit a0934fd2b1 upstream.

This barrier only applies to the read-modify-write operations; in
particular, it does not apply to the atomic_set() primitive.

Replace the barrier with an smp_mb().

Fixes: 6c0ca7ae29 ("sbitmap: fix wakeup hang after sbq resize")
Cc: stable@vger.kernel.org
Reported-by: "Paul E. McKenney" <paulmck@linux.ibm.com>
Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Omar Sandoval <osandov@fb.com>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: linux-block@vger.kernel.org
Cc: "Paul E. McKenney" <paulmck@linux.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-31 06:47:10 -07:00
arch KVM: x86: fix return value for reserved EFER 2019-05-31 06:47:10 -07:00
block block: do not leak memory in bio_copy_user_iov() 2019-04-17 08:37:53 +02:00
certs Replace magic for trusting the secondary keyring with #define 2018-09-09 19:55:54 +02:00
crypto crypto: ccm - fix incompatibility between "ccm" and "ccm_base" 2019-05-21 18:50:20 +02:00
Documentation x86/speculation/mds: Improve CPU buffer clear documentation 2019-05-21 18:50:13 +02:00
drivers fbdev: sm712fb: fix memory frequency by avoiding a switch/case fallthrough 2019-05-25 18:25:38 +02:00
firmware License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fs f2fs: Fix use of number of devices 2019-05-31 06:47:10 -07:00
include bio: fix improper use of smp_mb__before_atomic() 2019-05-31 06:47:10 -07:00
init init: initialize jump labels before command line option parsing 2019-05-16 19:42:23 +02:00
ipc ipc/sem.c: prevent queue.status tearing in semop 2018-09-05 09:26:30 +02:00
kernel bpf, lru: avoid messing with eviction heuristics upon syscall lookup 2019-05-25 18:25:38 +02:00
lib sbitmap: fix improper use of smp_mb__before_atomic() 2019-05-31 06:47:10 -07:00
mm mm/mincore.c: make mincore() more conservative 2019-05-21 18:50:16 +02:00
net mac80211: Fix kernel panic due to use of txq after free 2019-05-25 18:25:35 +02:00
samples samples: mei: use /dev/mei0 instead of /dev/mei 2019-02-15 08:09:12 +01:00
scripts kconfig/[mn]conf: handle backspace (^H) key 2019-05-04 09:15:22 +02:00
security apparmorfs: fix use-after-free on symlink traversal 2019-05-25 18:25:35 +02:00
sound ALSA: hda/realtek - Fix for Lenovo B50-70 inverted internal microphone bug 2019-05-21 18:50:20 +02:00
tools perf bench numa: Add define for RUSAGE_THREAD if not present 2019-05-25 18:25:36 +02:00
usr initramfs: fix initramfs rebuilds w/ compression after disabling 2017-11-03 07:39:19 -07:00
virt KVM: arm/arm64: Ensure vcpu target is unset on reset failure 2019-05-25 18:25:35 +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: rpm-pkg: keep spec file until make mrproper 2018-02-13 10:19:46 +01:00
.mailmap .mailmap: Add Maciej W. Rozycki's Imagination e-mail address 2017-11-10 12:16:15 -08:00
COPYING
CREDITS MAINTAINERS: update TPM driver infrastructure changes 2017-11-09 17:58:40 -08:00
Kbuild License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MAINTAINERS MAINTAINERS: Add Sasha as a stable branch maintainer 2018-12-01 09:42:50 +01:00
Makefile Linux 4.14.122 2019-05-25 18:25:38 +02:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

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.