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Al Viro eb028c3345 d_make_discardable(): warn if given a non-persistent dentry
At this point there are very few call chains that might lead to
d_make_discardable() on a dentry that hadn't been made persistent:
calls of simple_unlink() and simple_rmdir() in configfs and
apparmorfs.

Both filesystems do pin (part of) their contents in dcache, but
they are currently playing very unusual games with that.  Converting
them to more usual patterns might be possible, but it's definitely
going to be a long series of changes in both cases.

For now the easiest solution is to have both stop using simple_unlink()
and simple_rmdir() - that allows to make d_make_discardable() warn
when given a non-persistent dentry.

Rather than giving them full-blown private copies (with calls of
d_make_discardable() replaced with dput()), let's pull the parts of
simple_unlink() and simple_rmdir() that deal with timestamps and link
counts into separate helpers (__simple_unlink() and __simple_rmdir()
resp.) and have those used by configfs and apparmorfs.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2025-11-17 23:59:27 -05:00
Documentation get rid of kill_litter_super() 2025-11-17 23:59:27 -05:00
LICENSES LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2 2025-07-24 11:15:39 +02:00
arch convert hypfs 2025-11-17 23:59:27 -05:00
block block-6.18-20251031 2025-10-31 12:57:19 -07:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto This push contains the following changes: 2025-10-10 08:56:16 -07:00
drivers convert rust_binderfs 2025-11-17 23:59:27 -05:00
fs d_make_discardable(): warn if given a non-persistent dentry 2025-11-17 23:59:27 -05:00
include d_make_discardable(): warn if given a non-persistent dentry 2025-11-17 23:59:27 -05:00
init convert ramfs and tmpfs 2025-11-16 01:35:02 -05:00
io_uring io_uring: fix regbuf vector size truncation 2025-11-07 17:17:13 -07:00
ipc convert mqueue 2025-11-16 01:35:02 -05:00
kernel convert bpf 2025-11-16 01:35:03 -05:00
lib Crypto library fixes for v6.18-rc5 2025-11-06 12:48:18 -08:00
mm convert ramfs and tmpfs 2025-11-16 01:35:02 -05:00
net convert rpc_pipefs 2025-11-17 23:59:27 -05:00
rust rust: kbuild: workaround `rustdoc` doctests modifier bug 2025-11-04 00:00:06 +01:00
samples Char/Misc/IIO/Binder changes for 6.18-rc1 2025-10-04 16:26:32 -07:00
scripts kbuild: Let kernel-doc.py use PYTHON3 override 2025-11-08 19:42:22 -07:00
security d_make_discardable(): warn if given a non-persistent dentry 2025-11-17 23:59:27 -05:00
sound ASoC: Fixes for v6.18 2025-10-30 13:08:08 +01:00
tools iommufd 6.18 first rc pull 2025-11-07 13:13:09 -08:00
usr gen_init_cpio: Ignore fsync() returning EINVAL on pipes 2025-10-07 09:53:05 -07:00
virt KVM x86 fixes for 6.18: 2025-10-18 10:25:43 +02:00
.clang-format memblock: drop for_each_free_mem_pfn_range_in_zone_from() 2025-09-14 08:49:03 +03:00
.clippy.toml rust: clean Rust 1.88.0's warning about `clippy::disallowed_macros` configuration 2025-05-07 00:11:47 +02:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: remove Alyssa Rosenzweig 2025-09-18 21:17:31 +02:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore .gitignore: ignore compile_commands.json globally 2025-08-12 15:53:55 -07:00
.mailmap linux_kselftest-kunit-fixes-6.18-rc4 2025-10-30 19:11:27 -07:00
.pylintrc tools: docs: parse-headers.py: move it from sphinx dir 2025-08-29 15:54:42 -06:00
.rustfmt.toml rust: add `.rustfmt.toml` 2022-09-28 09:02:20 +02:00
COPYING
CREDITS MAINTAINERS: mark ISDN subsystem as orphan 2025-10-27 17:49:45 -07:00
Kbuild sched: Make migrate_{en,dis}able() inline 2025-09-25 09:57:16 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS perf tools fixes for v6.18: 2025-11-06 16:05:33 -08:00
Makefile Linux 6.18-rc5 2025-11-09 15:10:19 -08:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

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 reStructuredText 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.