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Jens Axboe cb5e1b8130 Revert "io_uring: wait potential ->release() on resurrect" 
This reverts commit 88f171ab77.

I ran into a case where the ref resurrect now spins, so revert
this change for now until we can further investigate why it's
broken. The bug seems to indicate spinning on the lock itself,
likely there's some ABBA deadlock involved:

[<0>] __percpu_ref_switch_mode+0x45/0x180
[<0>] percpu_ref_resurrect+0x46/0x70
[<0>] io_refs_resurrect+0x25/0xa0
[<0>] __io_uring_register+0x135/0x10c0
[<0>] __x64_sys_io_uring_register+0xc2/0x1a0
[<0>] do_syscall_64+0x42/0x110
[<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-02-25 07:37:35 -07:00
arch A single fix for objtool to generate proper unwind info for newer 2021-01-31 11:48:12 -08:00
block block-5.11-2021-01-29 2021-01-29 13:50:06 -08:00
certs .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
crypto X.509: Fix crash caused by NULL pointer 2021-01-20 11:33:51 -08:00
Documentation A single fix for objtool to generate proper unwind info for newer 2021-01-31 11:48:12 -08:00
drivers A single EFI fix from Lukas: 2021-01-31 11:57:37 -08:00
fs Revert "io_uring: wait potential ->release() on resurrect" 2021-02-25 07:37:35 -07:00
include io_uring: provide FIFO ordering for task_work 2021-02-10 07:28:43 -07:00
init Revert "init/console: Use ttynull as a fallback when there is no console" 2021-01-08 11:02:18 -08:00
ipc Merge branch 'akpm' (patches from Andrew) 2020-12-15 12:53:37 -08:00
kernel A single fix for the single step reporting regression caused by getting the 2021-01-31 11:39:32 -08:00
lib ubsan: disable unsigned-overflow check for i386 2021-01-24 10:34:52 -08:00
LICENSES LICENSES: Add the CC-BY-4.0 license 2020-12-08 10:33:27 -07:00
mm Revert "mm/slub: fix a memory leak in sysfs_slab_add()" 2021-01-28 09:05:44 -08:00
net NFS client bugfixes for Linux 5.11 2021-01-31 11:19:12 -08:00
samples ARM: SoC drivers for v5.11 2020-12-16 16:38:41 -08:00
scripts Kbuild fixes for v5.11 2021-01-10 13:24:55 -08:00
security dump_common_audit_data(): fix racy accesses to ->d_name 2021-01-16 15:11:35 -05:00
sound ALSA: hda/via: Apply the workaround generically for Clevo machines 2021-01-26 18:05:03 +01:00
tools Networking fixes for 5.11-rc6, including fixes from can, xfrm, wireless, 2021-01-28 15:24:43 -08:00
usr Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-08-07 13:29:39 -07:00
virt KVM/arm64 fixes for 5.11, take #2 2021-01-25 18:52:01 -05:00
.clang-format RDMA 5.10 pull request 2020-10-17 11:18:18 -07:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: docs: ignore sphinx_*/ directories 2020-09-10 10:44:31 -06:00
.mailmap mailmap: remove the "repo-abbrev" comment 2021-01-26 11:40:17 -08:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: dccp: move Gerrit Renker to CREDITS 2021-01-14 10:53:49 -08:00
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 MAINTAINERS: update io_uring section 2021-02-01 10:02:43 -07:00
Makefile Linux 5.11-rc6 2021-01-31 13:50:09 -08:00
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.