[PATCH v4 02/13] rust: init: make `#[pin_data]` compatible with conditional compilation of fields

[Benno Lossin]

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@xxxxxxxxx>
Reviewed-by: Gary Guo <gary@xxxxxxxxxxx>
Reviewed-by: Alice Ryhl <aliceryhl@xxxxxxxxxx>
Signed-off-by: Benno Lossin <benno.lossin@xxxxxxxxx>
---
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,
-- 
2.41.0