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Transaction configuration flags are currently represented as raw integers and manipulated via bitwise operations. This lacks type safety, making it possible to mix up different flag types without compile-time warnings. Use kernel::impl_flags! to migrate the transaction flags to a strongly-typed bitmask, enforcing compile-time safety. Key changes: - Define `TransactionFlags(u32)` and `TransactionFlag` with 4 variants. - Change flags field type to `TransactionFlags` in structs. - Add `is_oneway` helper on `TransactionFlags` to simplify checks. - Update `can_replace` logic to use type-safe combined flag checks. - Convert `flags` to `u32` for FFI boundaries and logging. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Jahnavi MN <jahnavimn@google.com> Link: https://patch.msgid.link/20260719-b4-rust_binder_impl_flags-v3-2-f8d0b3ea1b87@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>