rust: irq: declare cfi_encoding for irqreturn

The IRQ callbacks return c_uint. C calls them through irq_handler_t,
which returns enum irqreturn. kCFI encodes enum types by name even with
integer normalization, so the type ids never match and every call fails
the CFI check.

Generate irqreturn as a newtype with a cfi_encoding, as is done for
lru_status, and return bindings::irqreturn_t from the callbacks.

Fixes: 0851d34a8cc3 ("rust: irq: add support for non-threaded IRQs and handlers")
Fixes: 135d40523244 ("rust: irq: add support for threaded IRQs and handlers")
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20261019-rust-cfi-fixes-v1-1-9503472ba738@google.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

0 files changed, 0 insertions, 0 deletions