Re: [PATCH v4 08/10] x86-64: Emulate legacy vsyscalls

[Ingo Molnar]

* Andy Lutomirski <luto@xxxxxxx> wrote:

> +#ifdef CONFIG_X86_64
> +# define VSYSCALL_EMU_VECTOR		0xcc
> +#endif

> --- a/arch/x86/kernel/traps.c
> +++ b/arch/x86/kernel/traps.c
> @@ -872,6 +872,10 @@ void __init trap_init(void)
>  	set_bit(SYSCALL_VECTOR, used_vectors);
>  #endif
>  
> +	BUG_ON(test_bit(VSYSCALL_EMU_VECTOR, used_vectors));
> +	set_system_intr_gate(VSYSCALL_EMU_VECTOR, &emulate_vsyscall);
> +	set_bit(VSYSCALL_EMU_VECTOR, used_vectors);

That is a generic section of traps.c so it won't build (and makes no 
point) on 32-bit.

	Ingo
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