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Pavel Begunkov b60c8dce33 io_uring: preparation for rsrc tagging
We need a way to notify userspace when a lazily removed resource
actually died out. This will be done by associating a tag, which is u64
exactly like req->user_data, with each rsrc (e.g. buffer of file). A CQE
will be posted once a resource is actually put down.

Tag 0 is a special value set by default, for whcih it don't generate an
CQE, so providing the old behaviour.

Don't expose it to the userspace yet, but prepare internally, allocate
buffers, add all posting hooks, etc.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/2e6beec5eabe7216bb61fb93cdf5aaf65812a9b0.1619356238.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-04-25 10:14:04 -06:00
arch - Fix the vDSO exception handling return path to disable interrupts 2021-04-11 11:42:18 -07:00
block
certs
crypto
Documentation Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2021-04-10 09:10:55 -07:00
drivers - Fix the vDSO exception handling return path to disable interrupts 2021-04-11 11:42:18 -07:00
fs io_uring: preparation for rsrc tagging 2021-04-25 10:14:04 -06:00
include io_uring: unify files and task cancel 2021-04-11 19:30:41 -06:00
init
ipc
kernel task_work: add helper for more targeted task_work canceling 2021-04-11 19:30:25 -06:00
lib lib: fix kconfig dependency on ARCH_WANT_FRAME_POINTERS 2021-04-09 14:54:23 -07:00
LICENSES
mm Merge branch 'for-5.12-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu 2021-04-10 12:51:12 -07:00
net
samples
scripts
security
sound
tools perf tools fixes for v5.12: 3rd batch 2021-04-09 17:12:31 -07:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap .mailmap: fix old email addresses 2021-04-09 14:54:23 -07:00
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Merge branch 'akpm' (patches from Andrew) 2021-04-09 17:06:32 -07:00
Makefile Linux 5.12-rc7 2021-04-11 15:16:13 -07:00
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.