linux-kernel - [PATCH 0/3] rust: Miscellaneous macro improvements

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Date:   Fri, 24 Feb 2023 16:25:54 +0900
From:   Asahi Lina <lina@...hilina.net>
To:     Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>
Cc:     rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
        asahi@...ts.linux.dev, Asahi Lina <lina@...hilina.net>,
        Finn Behrens <me@...enk.dev>,
        Sumera Priyadarsini <sylphrenadin@...il.com>
Subject: [PATCH 0/3] rust: Miscellaneous macro improvements

Hi everyone!

This short series is part of the set of dependencies for the drm/asahi
Apple M1/M2 GPU driver.

The first two patches make concat_idents!(bindings::foo, bar) work.
I use this later in the DRM abstractions to construct DRM IOCTL command
names [1], which avoids having to import all of bindings::*.

The third patch allows specifying multiple module aliases. Since modules
can have multiple aliases, the macro naturally needs to be able to take
an array instead of a single alias. I don't use this in the current
iteration of the driver, since I introduced proper support for automatic
modpost alias generation for Rust modules, but it can be useful both to
remove that support as a blocking factor (we can specify aliases manually
as a fallback), and for modules which need extra aliases not covered by
device ID tables.

[1] https://github.com/AsahiLinux/linux/blob/gpu/rebase-20230224/rust/kernel/drm/ioctl.rs#L101

Signed-off-by: Asahi Lina <lina@...hilina.net>
---
Asahi Lina (3):
      rust: macros: Make expect_punct() return the Punct directly
      rust: macros: concat_idents: Allow :: paths in the first argument
      rust: macros: Allow specifying multiple module aliases
 rust/macros/concat_idents.rs | 24 +++++++++++++++++++++---
 rust/macros/helpers.rs       | 14 +++++++++++---
 rust/macros/module.rs        | 34 +++++++++++++++++++++++++++-------
 3 files changed, 59 insertions(+), 13 deletions(-)
---
base-commit: 83f978b63fa7ad474ca22d7e2772c5988101c9bd
change-id: 20230224-rust-macros-633dbf870ae1

Thank you,
~~ Lina