linux.git/rust/kernel/bits.rs, branch v6.18.21 Clone of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git rust: bits: always inline functions using build_assert with arguments 2026-02-06T15:57:41+00:00 Alexandre Courbot acourbot@nvidia.com 2025-12-08T02:47:02+00:00 625605ac8be501a667abe53a9c4ea854bc3e0288 commit 09c3c9112d71c44146419c87c55c710e68335741 upstream. `build_assert` relies on the compiler to optimize out its error path. Functions using it with its arguments must thus always be inlined, otherwise the error path of `build_assert` might not be optimized out, triggering a build error. Cc: stable@vger.kernel.org Fixes: cc84ef3b88f4 ("rust: bits: add support for bits/genmask macros") Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Link: https://patch.msgid.link/20251208-io-build-assert-v3-4-98aded02c1ea@nvidia.com Signed-off-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 09c3c9112d71c44146419c87c55c710e68335741 upstream.

`build_assert` relies on the compiler to optimize out its error path.
Functions using it with its arguments must thus always be inlined,
otherwise the error path of `build_assert` might not be optimized out,
triggering a build error.

Cc: stable@vger.kernel.org
Fixes: cc84ef3b88f4 ("rust: bits: add support for bits/genmask macros")
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Link: https://patch.msgid.link/20251208-io-build-assert-v3-4-98aded02c1ea@nvidia.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
rust: bits: add support for bits/genmask macros 2025-07-19T21:18:18+00:00 Daniel Almeida daniel.almeida@collabora.com 2025-07-14T23:29:58+00:00 cc84ef3b88f407e8bd5a5f7b6906d1e69851c856 In light of bindgen being unable to generate bindings for macros, and owing to the widespread use of these macros in drivers, manually define the bit and genmask C macros in Rust. The *_checked version of the functions provide runtime checking while the const version performs compile-time assertions on the arguments via the build_assert!() macro. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com> Reviewed-by: Danilo Krummrich <dakr@kernel.org> Link: https://lore.kernel.org/r/20250714-topics-tyr-genmask2-v9-1-9e6422cbadb6@collabora.com [ `expect`ed Clippy warning in doctests, hid single `use`, grouped examples. Reworded title. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org> 
In light of bindgen being unable to generate bindings for macros, and
owing to the widespread use of these macros in drivers, manually define
the bit and genmask C macros in Rust.

The *_checked version of the functions provide runtime checking while
the const version performs compile-time assertions on the arguments via
the build_assert!() macro.

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/r/20250714-topics-tyr-genmask2-v9-1-9e6422cbadb6@collabora.com
[ `expect`ed Clippy warning in doctests, hid single `use`, grouped
  examples. Reworded title. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>