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Date:   Mon, 14 Aug 2023 08:46:31 +0000
To:     Miguel Ojeda <ojeda@kernel.org>,
        Wedson Almeida Filho <wedsonaf@gmail.com>,
        Alex Gaynor <alex.gaynor@gmail.com>
From:   Benno Lossin <benno.lossin@proton.me>
Cc:     Boqun Feng <boqun.feng@gmail.com>, Gary Guo <gary@garyguo.net>,
        =?utf-8?Q?Bj=C3=B6rn_Roy_Baron?= <bjorn3_gh@protonmail.com>,
        Benno Lossin <benno.lossin@proton.me>,
        Alice Ryhl <aliceryhl@google.com>,
        Andreas Hindborg <nmi@metaspace.dk>,
        rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
        patches@lists.linux.dev,
        Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Subject: [PATCH v4 02/13] rust: init: make `#[pin_data]` compatible with conditional compilation of fields
Message-ID: <20230814084602.25699-3-benno.lossin@proton.me>
In-Reply-To: <20230814084602.25699-1-benno.lossin@proton.me>
References: <20230814084602.25699-1-benno.lossin@proton.me>
Feedback-ID: 71780778:user:proton
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This patch allows one to write
```
#[pin_data]
pub struct Foo {
    #[cfg(CONFIG_BAR)]
    a: Bar,
    #[cfg(not(CONFIG_BAR))]
    a: Baz,
}
```
Before, this would result in a compile error, because `#[pin_data]`
would generate two functions named `a` for both fields unconditionally.

Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Benno Lossin <benno.lossin@proton.me>
---
v3 -> v4:
- added Reviewed-by's from Gary, Alice and Martin.

 rust/kernel/init/macros.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rust/kernel/init/macros.rs b/rust/kernel/init/macros.rs
index fbaebd34f218..9182fdf99e7e 100644
--- a/rust/kernel/init/macros.rs
+++ b/rust/kernel/init/macros.rs
@@ -962,6 +962,7 @@ impl<$($impl_generics)*> $pin_data<$($ty_generics)*>
         where $($whr)*
         {
             $(
+                $(#[$($p_attr)*])*
                 $pvis unsafe fn $p_field<E>(
                     self,
                     slot: *mut $p_type,
@@ -971,6 +972,7 @@ impl<$($impl_generics)*> $pin_data<$($ty_generics)*>
                 }
             )*
             $(
+                $(#[$($attr)*])*
                 $fvis unsafe fn $field<E>(
                     self,
                     slot: *mut $type,
--=20
2.41.0