pm24.git/rust/Makefile, branch rust-6.8

rust: support `srctree`-relative links

2023-12-21T19:54:17Z

Some of our links use relative paths in order to point to files in the source tree, e.g.: //! C header: [`include/linux/printk.h`](../../../../include/linux/printk.h) /// [`struct mutex`]: ../../../../include/linux/mutex.h These are problematic because they are hard to maintain and do not support `O=` builds. Instead, provide support for `srctree`-relative links, e.g.: //! C header: [`include/linux/printk.h`](srctree/include/linux/printk.h) /// [`struct mutex`]: srctree/include/linux/mutex.h The links are fixed after `rustdoc` generation to be based on the absolute path to the source tree. Essentially, this is the automatic version of Tomonori's fix [1], suggested by Gary [2]. Suggested-by: Gary Guo Reported-by: FUJITA Tomonori Closes: https://lore.kernel.org/r/20231026.204058.2167744626131849993.fujita.tomonori@gmail.com [1] Fixes: 48fadf440075 ("docs: Move rustdoc output, cross-reference it") Link: https://lore.kernel.org/rust-for-linux/20231026154525.6d14b495@eugeo/ [2] Reviewed-by: Martin Rodriguez Reboredo Reviewed-by: Benno Lossin Link: https://lore.kernel.org/r/20231215235428.243211-1-ojeda@kernel.org Signed-off-by: Miguel Ojeda

rust: Suppress searching builtin sysroot

2023-12-14T19:14:01Z

By default, if Rust is passed `--target=foo` rather than a target.json file, it will infer a default sysroot if that component is installed. As the proposed aarch64 support [1] uses `aarch64-unknown-none` rather than a target.json file, this is needed [2] to prevent rustc from being confused between the custom kernel sysroot and the pre-installed one. [ Miguel: Applied Boqun's extra case (for `rusttest`) and reworded to add links to the arm64 patch series discussion. In addition, fixed the `rustdoc` target too (which requires a conditional since `cmd_rustdoc` is also used for host crates like `macros`). ] Signed-off-by: Matthew Maurer Tested-by: Boqun Feng Reviewed-by: Alice Ryhl Link: https://lore.kernel.org/rust-for-linux/20231020155056.3495121-1-Jamie.Cunliffe@arm.com/ [1] Link: https://lore.kernel.org/rust-for-linux/CAGSQo01pOixiPXkW867h4vPUaAjtKtHGKhkV-rpifJvKxAf4Ww@mail.gmail.com/ [2] Link: https://lore.kernel.org/r/20231031201752.1189213-1-mmaurer@google.com Signed-off-by: Miguel Ojeda

rust: bindings: rename const binding using sed

2023-12-14T19:14:01Z

Currently, for `const`s that bindgen doesn't recognise, we define a helper constant with const BINDINGS_ = ; in `bindings_helper.h` and then we put pub const : = BINDINGS_; in `bindings/lib.rs`. This is fine since we currently only have 3 constants that are defined this way, but is going to be more annoying when more constants are added since every new constant needs to be defined in two places. This patch changes the way we define constant helpers to const RUST_CONST_HELPER_ = ; and then use `sed` to postprocess Rust code generated by bindgen to remove the distinct prefix, so users of the `bindings` crate can refer to the name directly. Reviewed-by: Benno Lossin Reviewed-by: Andreas Hindborg Reviewed-by: Martin Rodriguez Reboredo Signed-off-by: Gary Guo Reviewed-by: Alice Ryhl Link: https://lore.kernel.org/r/20231104145700.2495176-1-gary@garyguo.net [ Reworded for typos. ] Signed-off-by: Miguel Ojeda

Merge tag 'kbuild-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2023-11-04T18:07:19Z

Pull Kbuild updates from Masahiro Yamada: - Implement the binary search in modpost for faster symbol lookup - Respect HOSTCC when linking host programs written in Rust - Change the binrpm-pkg target to generate kernel-devel RPM package - Fix endianness issues for tee and ishtp MODULE_DEVICE_TABLE - Unify vdso_install rules - Remove unused __memexit* annotations - Eliminate stale whitelisting for __devinit/__devexit from modpost - Enable dummy-tools to handle the -fpatchable-function-entry flag - Add 'userldlibs' syntax * tag 'kbuild-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits) kbuild: support 'userldlibs' syntax kbuild: dummy-tools: pretend we understand -fpatchable-function-entry kbuild: Correct missing architecture-specific hyphens modpost: squash ALL_{INIT,EXIT}_TEXT_SECTIONS to ALL_TEXT_SECTIONS modpost: merge sectioncheck table entries regarding init/exit sections modpost: use ALL_INIT_SECTIONS for the section check from DATA_SECTIONS modpost: disallow the combination of EXPORT_SYMBOL and __meminit* modpost: remove EXIT_SECTIONS macro modpost: remove MEM_INIT_SECTIONS macro modpost: remove more symbol patterns from the section check whitelist modpost: disallow *driver to reference .meminit* sections linux/init: remove __memexit* annotations modpost: remove ALL_EXIT_DATA_SECTIONS macro kbuild: simplify cmd_ld_multi_m kbuild: avoid too many execution of scripts/pahole-flags.sh kbuild: remove ARCH_POSTLINK from module builds kbuild: unify no-compiler-targets and no-sync-config-targets kbuild: unify vdso_install rules docs: kbuild: add INSTALL_DTBS_PATH UML: remove unused cmd_vdso_install ...

Merge tag 'rust-6.7' of https://github.com/Rust-for-Linux/linux

2023-10-31T06:30:49Z

Pull rust updates from Miguel Ojeda: "A small one compared to the previous one in terms of features. In terms of lines, as usual, the 'alloc' version upgrade accounts for most of them. Toolchain and infrastructure: - Upgrade to Rust 1.73.0 This time around, due to how the kernel and Rust schedules have aligned, there are two upgrades in fact. They contain the fixes for a few issues we reported to the Rust project. In addition, a few cleanups indicated by the upgraded compiler or possible thanks to it. For instance, the compiler now detects redundant explicit links. - A couple changes to the Rust 'Makefile' so that it can be used with toybox tools, allowing Rust to be used in the Android kernel build. x86: - Enable IBT if enabled in C Documentation: - Add "The Rust experiment" section to the Rust index page MAINTAINERS: - Add Maintainer Entry Profile field ('P:'). - Update our 'W:' field to point to the webpage we have been building this year" * tag 'rust-6.7' of https://github.com/Rust-for-Linux/linux: docs: rust: add "The Rust experiment" section x86: Enable IBT in Rust if enabled in C rust: Use grep -Ev rather than relying on GNU grep rust: Use awk instead of recent xargs rust: upgrade to Rust 1.73.0 rust: print: use explicit link in documentation rust: task: remove redundant explicit link rust: kernel: remove `#[allow(clippy::new_ret_no_self)]` MAINTAINERS: add Maintainer Entry Profile field for Rust MAINTAINERS: update Rust webpage rust: upgrade to Rust 1.72.1 rust: arc: add explicit `drop()` around `Box::from_raw()`

rust: docs: fix logo replacement

2023-10-19T14:40:00Z

The static files placement by `rustdoc` changed in Rust 1.67.0 [1], but the custom code we have to replace the logo in the generated HTML files did not get updated. Thus update it to have the Linux logo again in the output. Hopefully `rustdoc` will eventually support a custom logo from a local file [2], so that we do not need to maintain this hack on our side. Link: https://github.com/rust-lang/rust/pull/101702 [1] Link: https://github.com/rust-lang/rfcs/pull/3226 [2] Fixes: 3ed03f4da06e ("rust: upgrade to Rust 1.68.2") Cc: stable@vger.kernel.org Tested-by: Benno Lossin Reviewed-by: Andreas Hindborg Link: https://lore.kernel.org/r/20231018155527.1015059-1-ojeda@kernel.org Signed-off-by: Miguel Ojeda

rust: Use grep -Ev rather than relying on GNU grep

2023-10-15T19:56:26Z

While GNU grep supports '\|' when in basic regular expression mode, not all grep implementations do (notably toybox grep, used to build the Android kernel, does not). Switching to grep -Ev enables extended regular expressions which includes support for the '|' operator. Signed-off-by: Matthew Maurer Reviewed-by: Martin Rodriguez Reboredo Reviewed-by: Trevor Gross Reviewed-by: Alice Ryhl Tested-by: Alice Ryhl Link: https://lore.kernel.org/r/20230928201421.2296518-1-mmaurer@google.com [ Reworded for typo. ] Signed-off-by: Miguel Ojeda

rust: Use awk instead of recent xargs

2023-10-15T19:48:24Z

`awk` is already required by the kernel build, and the `xargs` feature used in current Rust detection is not present in all `xargs` (notably, toybox based xargs, used in the Android kernel build). Signed-off-by: Matthew Maurer Reviewed-by: Alice Ryhl Tested-by: Alice Ryhl Reviewed-by: Martin Rodriguez Reboredo Link: https://lore.kernel.org/r/20230928205045.2375899-1-mmaurer@google.com Signed-off-by: Miguel Ojeda

rust: Respect HOSTCC when linking for host

2023-10-14T09:26:28Z

Currently, rustc defaults to invoking `cc`, even if `HOSTCC` is defined, resulting in build failures in hermetic environments where `cc` does not exist. This includes both hostprogs and proc-macros. Since we are setting the linker to `HOSTCC`, we set the linker flavor to `gcc` explicitly. The linker-flavor selects both which linker to search for if the linker is unset, and which kind of linker flags to pass. Without this flag, `rustc` would attempt to determine which flags to pass based on the name of the binary passed as `HOSTCC`. `gcc` is the name of the linker-flavor used by `rustc` for all C compilers, including both `gcc` and `clang`. Signed-off-by: Matthew Maurer Reviewed-by: Martin Rodriguez Reboredo Tested-by: Alice Ryhl Reviewed-by: Nick Desaulniers Acked-by: Miguel Ojeda Signed-off-by: Masahiro Yamada

rust: fix bindgen build error with fstrict-flex-arrays

2023-10-12T20:58:52Z

Commit df8fc4e934c1 ("kbuild: Enable -fstrict-flex-arrays=3") enabled '-fstrict-flex-arrays=3' globally, but bindgen does not recognized this compiler option, triggering the following build error: error: unknown argument: '-fstrict-flex-arrays=3', err: true [ Miguel: Commit df8fc4e934c1 ("kbuild: Enable -fstrict-flex-arrays=3") did it so only conditionally (i.e. only if the C compiler supports it). This explains what Andrea was seeing: he was compiling with a modern enough GCC, which enables the option, but with an old enough Clang. Andrea confirmed this was the case: he was using Clang 14 with GCC 13; and that Clang 15 worked for him. While it is possible to construct code (see mailing list for an example I came up with) where this could break, it is fairly contrived, and anyway GCC-built kernels with Rust enabled should only be used for experimentation until we get support for `rustc_codegen_gcc` and/or GCC Rust. So let's add this for the time being in case it helps somebody. ] Add '-fstrict-flex-arrays' to the list of cflags that should be ignored by bindgen. Fixes: df8fc4e934c1 ("kbuild: Enable -fstrict-flex-arrays=3") Signed-off-by: Andrea Righi Tested-by: Gary Guo Link: https://lore.kernel.org/r/20230815065346.131387-1-andrea.righi@canonical.com Signed-off-by: Miguel Ojeda