linux-kernel - [PATCH 1/1] rust: bindgen: Add `alt

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Date:   Thu, 2 Mar 2023 11:16:36 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Miguel Ojeda <ojeda@...nel.org>
Cc:     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>,
        Derek Barbosa <debarbos@...hat.com>,
        rust-for-linux@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/1] rust: bindgen: Add `alt_instr` as opaque type

To address this build error:

    BINDGEN rust/bindings/bindings_generated.rs
    BINDGEN rust/bindings/bindings_helpers_generated.rs
    EXPORTS rust/exports_core_generated.h
    RUSTC P rust/libmacros.so
    RUSTC L rust/compiler_builtins.o
    RUSTC L rust/alloc.o
    RUSTC L rust/bindings.o
    RUSTC L rust/build_error.o
    EXPORTS rust/exports_alloc_generated.h
  error[E0588]: packed type cannot transitively contain a `#[repr(align)]` type
       --> /var/home/acme/git/linux/rust/bindings/bindings_generated.rs:10094:1
        |
  10094 | / pub struct alt_instr {
  10095 | |     pub instr_offset: s32,
  10096 | |     pub repl_offset: s32,
  10097 | |     pub __bindgen_anon_1: alt_instr__bindgen_ty_1,
  10098 | |     pub instrlen: u8_,
  10099 | |     pub replacementlen: u8_,
  10100 | | }
        | |_^
        |
  note: `alt_instr__bindgen_ty_1__bindgen_ty_1` has a `#[repr(align)]` attribute
       --> /var/home/acme/git/linux/rust/bindings/bindings_generated.rs:10111:1
        |
  10111 | / pub struct alt_instr__bindgen_ty_1__bindgen_ty_1 {
  10112 | |     pub _bitfield_1: __BindgenBitfieldUnit<[u8; 4usize], u16>,
  10113 | | }
        | |_^
  note: `alt_instr` contains a field of type `alt_instr__bindgen_ty_1`
       --> /var/home/acme/git/linux/rust/bindings/bindings_generated.rs:10097:9
        |
  10097 |     pub __bindgen_anon_1: alt_instr__bindgen_ty_1,
        |         ^^^^^^^^^^^^^^^^
  note: ...which contains a field of type `alt_instr__bindgen_ty_1__bindgen_ty_1`
       --> /var/home/acme/git/linux/rust/bindings/bindings_generated.rs:10104:9
        |
  10104 |     pub __bindgen_anon_1: alt_instr__bindgen_ty_1__bindgen_ty_1,
        |         ^^^^^^^^^^^^^^^^

  error: aborting due to previous error

  For more information about this error, try `rustc --explain E0588`.
  make[1]: *** [rust/Makefile:389: rust/bindings.o] Error 1
  make: *** [Makefile:1293: prepare] Error 2

Cc: Derek Barbosa <debarbos@...hat.com>
Cc: Miguel Ojeda <ojeda@...nel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 rust/bindgen_parameters | 1 +
 1 file changed, 1 insertion(+)

diff --git a/rust/bindgen_parameters b/rust/bindgen_parameters
index be4963bf720304da..552d9a85925b9945 100644
--- a/rust/bindgen_parameters
+++ b/rust/bindgen_parameters
@@ -6,6 +6,7 @@
 --opaque-type local_apic
 
 # Packed type cannot transitively contain a `#[repr(align)]` type.
+--opaque-type alt_instr
 --opaque-type x86_msi_data
 --opaque-type x86_msi_addr_lo
 
-- 
2.39.2