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Denis Efremov ba17363729 Revert "floppy: reintroduce O_NDELAY fix" 
commit c7e9d00203 upstream.

The patch breaks userspace implementations (e.g. fdutils) and introduces
regressions in behaviour. Previously, it was possible to O_NDELAY open a
floppy device with no media inserted or with write protected media without
an error. Some userspace tools use this particular behavior for probing.

It's not the first time when we revert this patch. Previous revert is in
commit f2791e7ead (Revert "floppy: refactor open() flags handling").

This reverts commit 8a0c014cd2.

Link: https://lore.kernel.org/linux-block/de10cb47-34d1-5a88-7751-225ca380f735@compro.net/
Reported-by: Mark Hounschell <markh@compro.net>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Wim Osterholt <wim@djo.tudelft.nl>
Cc: Kurt Garloff <kurt@garloff.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-09-03 10:23:06 +02:00
arch arm64: dts: qcom: msm8994-angler: Fix gpio-reserved-ranges 85-88 2021-09-03 10:23:06 +02:00
block blk-mq: don't grab rq's refcount in blk_mq_check_expired() 2021-09-03 10:23:03 +02:00
certs Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
crypto crypto: sm2 - fix a memory leak in sm2 2021-07-14 17:06:44 +02:00
Documentation dt-bindings: sifive-l2-cache: Fix 'select' matching 2021-09-03 10:22:47 +02:00
drivers Revert "floppy: reintroduce O_NDELAY fix" 2021-09-03 10:23:06 +02:00
fs btrfs: fix NULL pointer dereference when deleting device by invalid id 2021-09-03 10:23:06 +02:00
include pipe: avoid unnecessary EPOLLET wakeups under normal loads 2021-09-03 10:23:05 +02:00
init sched/core: Initialize the idle task with preemption disabled 2021-07-14 17:06:21 +02:00
ipc ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry 2021-05-22 15:09:07 -10:00
kernel sched: Fix get_push_task() vs migrate_disable() 2021-09-03 10:22:59 +02:00
lib once: Fix panic when module unload 2021-09-03 10:22:46 +02:00
LICENSES LICENSES: Add the CC-BY-4.0 license 2020-12-08 10:33:27 -07:00
mm mm/memory_hotplug: fix potential permanent lru cache disable 2021-09-03 10:22:48 +02:00
net tipc: call tipc_wait_for_connect only when dlen is not 0 2021-09-03 10:23:05 +02:00
samples bpf, samples: Fix xdpsock with '-M' parameter missing unload process 2021-07-28 14:37:21 +02:00
scripts scripts/tracing: fix the bug that can't parse raw_trace_func 2021-08-12 13:32:16 +02:00
security bpf: Add lockdown check for probe_write_user helper 2021-08-15 14:01:56 +02:00
sound ASoC: component: Remove misplaced prefix handling in pin control functions 2021-09-03 10:22:44 +02:00
tools tools/virtio: fix build 2021-09-03 10:23:01 +02:00
usr .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
virt KVM: Do not leak memory for duplicate debugfs directories 2021-08-12 13:32:23 +02:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Marek's other e-mail address and identity without diacritics 2021-06-24 19:40:54 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: move Murali Karicheri to credits 2021-04-29 15:47:30 -07:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Merge branch 'akpm' (patches from Andrew) 2021-06-25 11:05:03 -07:00
Makefile Linux 5.13.13 2021-08-26 08:48:43 -04:00
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.