On Mon, May 16, 2022 at 05:13:29PM +1000, Stephen Rothwell wrote:
> Hi all,
>
> Today's linux-next merge of the rust tree got a conflict in:
>
> include/uapi/linux/android/binder.h
>
> between commit:
>
> bd32889e841c ("binder: add BINDER_GET_EXTENDED_ERROR ioctl")
>
> from the char-misc tree and commit:
>
> d637f9ec1954 ("[RFC] drivers: android: Binder IPC in Rust")
>
> from the rust tree.
>
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
>
> --
> Cheers,
> Stephen Rothwell
>
> diff --cc include/uapi/linux/android/binder.h
> index e6ee8cae303b,a982c30dbbf5..000000000000
> --- a/include/uapi/linux/android/binder.h
> +++ b/include/uapi/linux/android/binder.h
> @@@ -236,35 -236,21 +236,37 @@@ struct binder_frozen_status_info
> __u32 async_recv;
> };
>
> +/* struct binder_extened_error - extended error information
> + * @id: identifier for the failed operation
> + * @command: command as defined by binder_driver_return_protocol
> + * @param: parameter holding a negative errno value
> + *
> + * Used with BINDER_GET_EXTENDED_ERROR. This extends the error information
> + * returned by the driver upon a failed operation. Userspace can pull this
> + * data to properly handle specific error scenarios.
> + */
> +struct binder_extended_error {
> + __u32 id;
> + __u32 command;
> + __s32 param;
> +};
> +
> - #define BINDER_WRITE_READ _IOWR('b', 1, struct binder_write_read)
> - #define BINDER_SET_IDLE_TIMEOUT _IOW('b', 3, __s64)
> - #define BINDER_SET_MAX_THREADS _IOW('b', 5, __u32)
> - #define BINDER_SET_IDLE_PRIORITY _IOW('b', 6, __s32)
> - #define BINDER_SET_CONTEXT_MGR _IOW('b', 7, __s32)
> - #define BINDER_THREAD_EXIT _IOW('b', 8, __s32)
> - #define BINDER_VERSION _IOWR('b', 9, struct binder_version)
> - #define BINDER_GET_NODE_DEBUG_INFO _IOWR('b', 11, struct binder_node_debug_info)
> - #define BINDER_GET_NODE_INFO_FOR_REF _IOWR('b', 12, struct binder_node_info_for_ref)
> - #define BINDER_SET_CONTEXT_MGR_EXT _IOW('b', 13, struct flat_binder_object)
> - #define BINDER_FREEZE _IOW('b', 14, struct binder_freeze_info)
> - #define BINDER_GET_FROZEN_INFO _IOWR('b', 15, struct binder_frozen_status_info)
> - #define BINDER_ENABLE_ONEWAY_SPAM_DETECTION _IOW('b', 16, __u32)
> - #define BINDER_GET_EXTENDED_ERROR _IOWR('b', 17, struct binder_extended_error)
> + enum {
> + BINDER_WRITE_READ = _IOWR('b', 1, struct binder_write_read),
> + BINDER_SET_IDLE_TIMEOUT = _IOW('b', 3, __s64),
> + BINDER_SET_MAX_THREADS = _IOW('b', 5, __u32),
> + BINDER_SET_IDLE_PRIORITY = _IOW('b', 6, __s32),
> + BINDER_SET_CONTEXT_MGR = _IOW('b', 7, __s32),
> + BINDER_THREAD_EXIT = _IOW('b', 8, __s32),
> + BINDER_VERSION = _IOWR('b', 9, struct binder_version),
> + BINDER_GET_NODE_DEBUG_INFO = _IOWR('b', 11, struct binder_node_debug_info),
> + BINDER_GET_NODE_INFO_FOR_REF = _IOWR('b', 12, struct binder_node_info_for_ref),
> + BINDER_SET_CONTEXT_MGR_EXT = _IOW('b', 13, struct flat_binder_object),
> + BINDER_FREEZE = _IOW('b', 14, struct binder_freeze_info),
> + BINDER_GET_FROZEN_INFO = _IOWR('b', 15, struct binder_frozen_status_info),
> + BINDER_ENABLE_ONEWAY_SPAM_DETECTION = _IOW('b', 16, __u32),
> ++ BINDER_GET_EXTENDED_ERROR = _IOWR('b', 17, struct binder_extended_error),
> + };
>
Odd, why does the Rust binder implementation require the IOCTL
definitions to be in an enum instead of a #define?
If that's required, I can take that type of change now to prevent merge
issues in the future.
thanks,
greg k-h
