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rust/bindgen_parameters: Mark s390 types as opaque to prevent repr conflicts

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Bindgen attempts to generate Rust layouts for a number of s390 structs
that are packed but contain, or transitively contain, aligned fields.
Rust rejects such layouts with E0588 ("packed type cannot transitively
contain a #[repr(align)] type").

Add the affected s390 types to the opaque type list so bindgen emits
opaque blob types instead of full representations. This matches existing
workarounds for x86 types such as alt_instr and x86_msi_data.

Link: https://lore.kernel.org/all/e5c7aa10-590d-0d20-dd3b-385bee2377e7@intel.com/
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Gary Guo <gary@garyguo.net>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Jan Polensky <japo@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Jan Polensky
2026-06-01 19:46:22 +02:00
committed by Alexander Gordeev
parent 6900bec59d
commit fc1118cdc3
1 changed files with 7 additions and 0 deletions
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rust/bindgen_parameters
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@@ -14,6 +14,13 @@
--opaque-type alt_instr
--opaque-type x86_msi_data
--opaque-type x86_msi_addr_lo
# s390-only: same packed/align issue as above (E0588).
--opaque-type lowcore
--opaque-type tod_clock
--opaque-type tpi_info
--opaque-type uv_cb.*
--opaque-type uv_secret.*
--opaque-type zpci_fib
# If SMP is disabled, `arch_spinlock_t` is defined as a ZST which triggers a Rust
# warning. We don't need to peek into it anyway.