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Filename Latest commit message Latest commit date
Ming Lei 0a67b5a926 block: fix race between switching elevator and removing queues 
cecf5d87ff ("block: split .sysfs_lock into two locks") starts to
release & actuire sysfs_lock again during switching elevator. So it
isn't enough to prevent switching elevator from happening by simply
clearing QUEUE_FLAG_REGISTERED with holding sysfs_lock, because
in-progress switch still can move on after re-acquiring the lock,
meantime the flag of QUEUE_FLAG_REGISTERED won't get checked.

Fixes this issue by checking 'q->elevator' directly & locklessly after
q->kobj is removed in blk_unregister_queue(), this way is safe because
q->elevator can't be changed at that time.

Fixes: cecf5d87ff ("block: split .sysfs_lock into two locks")
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-09-12 07:13:22 -06:00
arch powerpc fixes for 5.3 #3 2019-08-04 10:30:47 -07:00
block block: fix race between switching elevator and removing queues 2019-09-12 07:13:22 -06:00
certs
crypto
Documentation docs: block: null_blk: enhance document style 2019-09-11 16:04:22 -06:00
drivers scsi: core: remove dummy q->dev check 2019-09-12 07:11:58 -06:00
fs writeback: add tracepoints for cgroup foreign writebacks 2019-08-30 07:42:49 -06:00
include block: Delay default elevator initialization 2019-09-05 19:52:34 -06:00
init
ipc
kernel memremap: move from kernel/ to mm/ 2019-08-03 07:02:01 -07:00
lib lib: scatterlist: Fix to support no mapped sg 2019-08-08 07:45:01 -06:00
LICENSES
mm writeback: add tracepoints for cgroup foreign writebacks 2019-08-30 07:42:49 -06:00
net
samples treewide: remove SPDX "WITH Linux-syscall-note" from kernel-space headers again 2019-07-25 11:05:10 +02:00
scripts kconfig: Clear "written" flag to avoid data loss 2019-08-04 12:44:15 +09:00
security selinux/stable-5.3 PR 20190801 2019-08-02 18:40:49 -07:00
sound sound fixes for 5.3-rc3 2019-08-02 08:53:34 -07:00
tools iocost_monitor: Report debt 2019-09-10 12:31:39 -06:00
usr kbuild: enable arch/s390/include/uapi/asm/zcrypt.h for uapi header test 2019-07-23 10:45:46 +02:00
virt Documentation: move Documentation/virtual to Documentation/virt 2019-07-24 10:52:11 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore .gitignore: Add compilation database file 2019-07-27 12:18:19 +09:00
.mailmap MAINTAINERS: Update my email address 2019-07-22 14:57:50 +01:00
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: Add Geert as Renesas SoC Co-Maintainer 2019-08-04 10:23:23 -07:00
Makefile Linux 5.3-rc3 2019-08-04 18:40:12 -07:00
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.