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Nick Desaulniers cbe8ded48b x86/srso: Fix build breakage with the LLVM linker
The assertion added to verify the difference in bits set of the
addresses of srso_untrain_ret_alias() and srso_safe_ret_alias() would fail
to link in LLVM's ld.lld linker with the following error:

  ld.lld: error: ./arch/x86/kernel/vmlinux.lds:210: at least one side of
  the expression must be absolute
  ld.lld: error: ./arch/x86/kernel/vmlinux.lds:211: at least one side of
  the expression must be absolute

Use ABSOLUTE to evaluate the expression referring to at least one of the
symbols so that LLD can evaluate the linker script.

Also, add linker version info to the comment about XOR being unsupported
in either ld.bfd or ld.lld until somewhat recently.

Fixes: fb3bd914b3 ("x86/srso: Add a Speculative RAS Overflow mitigation")
Closes: https://lore.kernel.org/llvm/CA+G9fYsdUeNu-gwbs0+T6XHi4hYYk=Y9725-wFhZ7gJMspLDRA@mail.gmail.com/
Reported-by: Nathan Chancellor <nathan@kernel.org>
Reported-by: Daniel Kolesa <daniel@octaforge.org>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Suggested-by: Sven Volkinsfeld <thyrc@gmx.net>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://github.com/ClangBuiltLinux/linux/issues/1907
Link: https://lore.kernel.org/r/20230809-gds-v1-1-eaac90b0cbcc@google.com
2023-08-10 11:03:12 +02:00
Documentation Documentation/srso: Document IBPB aspect and fix formatting 2023-08-10 11:03:12 +02:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
arch x86/srso: Fix build breakage with the LLVM linker 2023-08-10 11:03:12 +02:00
block block-6.5-2023-07-21 2023-07-22 11:05:15 -07:00
certs KEYS: Add missing function documentation 2023-04-24 16:15:52 +03:00
crypto crypto: algif_hash - Fix race between MORE and non-MORE sends 2023-07-08 22:48:42 +10:00
drivers driver core: cpu: Unify redundant silly stubs 2023-08-10 11:03:04 +02:00
fs hardening fixes for v6.5-rc6 2023-08-08 14:59:49 -07:00
include Add a mitigation for the speculative RAS (Return Address Stack) overflow 2023-08-07 16:35:44 -07:00
init Kbuild updates for v6.5 2023-07-01 09:24:31 -07:00
io_uring io_uring-6.5-2023-07-28 2023-07-28 10:19:44 -07:00
ipc Merge branch 'work.namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2023-02-24 19:20:07 -08:00
kernel workqueue: Fixes for v6.5-rc5 2023-08-07 13:07:12 -07:00
lib workqueue: Fixes for v6.5-rc5 2023-08-07 13:07:12 -07:00
mm mm: Fix access_remote_vm() regression on tagged addresses 2023-08-09 08:05:23 -07:00
net Two patches to improve RBD exclusive lock interaction with 2023-08-04 11:29:38 -07:00
rust rust: fix bindgen build error with UBSAN_BOUNDS_STRICT 2023-08-04 17:10:50 +02:00
samples arm64: ftrace: Add direct call trampoline samples support 2023-07-10 17:51:54 -04:00
scripts x86: 2023-07-30 11:19:08 -07:00
security sysctl: set variable key_sysctls storage-class-specifier to static 2023-08-07 17:55:54 +00:00
sound ASoC: Fixes for v6.5 2023-07-27 14:54:23 +02:00
tools Add a mitigation for the speculative RAS (Return Address Stack) overflow 2023-08-07 16:35:44 -07:00
usr initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP 2023-06-06 17:54:49 +09:00
virt KVM: Grab a reference to KVM for VM and vCPU stats file descriptors 2023-07-29 11:05:28 -04:00
.clang-format iommu: Add for_each_group_device() 2023-05-23 08:15:51 +02:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Revert ".gitignore: ignore *.cover and *.mbx" 2023-07-04 15:05:12 -07:00
.mailmap mailmap: update remaining active codeaurora.org email addresses 2023-07-27 13:07:05 -07:00
.rustfmt.toml rust: add `.rustfmt.toml` 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS - Address -Wmissing-prototype warnings 2023-06-26 16:43:54 -07:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Raw NAND fixes: 2023-08-04 12:01:26 -07:00
Makefile Linux 6.5-rc5 2023-08-06 15:07:51 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -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 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.