linux-kernel - [PATCH 0/1] Fix redefine const

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Date:   Mon, 26 Jun 2023 15:42:41 +0800
From:   "Qingsong Chen" <changxian.cqs@...group.com>
To:     linux-kernel@...r.kernel.org
Cc:     "田洪亮" <tate.thl@...group.com>,
        "Qingsong Chen" <changxian.cqs@...group.com>,
        "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>,
        "Benno Lossin" <benno.lossin@...ton.me>,
        <rust-for-linux@...r.kernel.org>
Subject: [PATCH 0/1] Fix redefine const_name in `vtable` macro

Hi!

When using the `vtable` macro, I may find a problem.
If we define same function name in a trait (using `#[cfg]`),
the `vtable` macro will redefine `gen_const_name` for it, for
example:
```rust
    #[vtable]
    pub trait Foo {
        #[cfg(CONFIG_X)]
        fn bar();

        #[cfg(not(CONFIG_X))]
        fn bar(x: usize);
    }
```
This will define `HAS_BAR` twice. So I try to fix this by
using `HashSet`.

Qingsong Chen (1):
  rust: macros: fix redefine const_name in `vtable`

 rust/macros/vtable.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

-- 
2.40.1