Re: [PATCH v2 08/12] x86/paravirt: remove no longer needed 32-bit pvops cruft

[Peter Zijlstra]

On Fri, Nov 20, 2020 at 12:46:26PM +0100, Juergen Gross wrote:
> +#define ____PVOP_CALL(rettype, op, clbr, call_clbr, extra_clbr, ...)	\
>  	({								\
>  		PVOP_CALL_ARGS;						\
>  		PVOP_TEST_NULL(op);					\
> +		BUILD_BUG_ON(sizeof(rettype) > sizeof(unsigned long));	\
> +		asm volatile(paravirt_alt(PARAVIRT_CALL)		\
> +			     : call_clbr, ASM_CALL_CONSTRAINT		\
> +			     : paravirt_type(op),			\
> +			       paravirt_clobber(clbr),			\
> +			       ##__VA_ARGS__				\
> +			     : "memory", "cc" extra_clbr);		\
> +		(rettype)(__eax & PVOP_RETMASK(rettype));		\
>  	})

This is now very similar to ____PVOP_VCALL() (note how PVOP_CALL_ARGS is
PVOP_VCALL_ARGS).

Could we get away with doing something horrible like:

#define ____PVOP_VCALL(X...) (void)____PVOP_CALL(long, X)

?