[Qemu-devel] Re: [PATCH 21/21] provide an opaque for accelerator in cpu state

[Avi Kivity]

Glauber Costa wrote:
> Convert kqemu to use it. We also provide a small macro
> to easy the access to the accelerator fields.
>
>  
> +#define accel_opaque_field(env, type, field) ((type *)env->accel_opaque)->field
> +
>   

Since we already allow the accelerator to customize the allocation of 
CPUState, why is this needed?

For example, kqemu would allocate a KqemuCPUState (which has a CPUState 
field, which is the return value), and use container_of() to get to the 
kqemu-specific fields.

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error compiling committee.c: too many arguments to function