Re: [PATCH v3 5/5] KVM/x86/lbr: lazy save the guest lbr stack

[Peter Zijlstra]

On Thu, Sep 20, 2018 at 06:05:59PM +0800, Wei Wang wrote:
>  /**
> + * lbr_select_user_callstack - check if the user callstack mode is set
> + *
> + * @lbr_select: the lbr select msr
> + *
> + * Returns: true if the msr is configured to the user callstack mode.
> + * Otherwise, false.
> + *
> + */
> +bool lbr_select_user_callstack(u64 lbr_select)
> +{
> +	return !!(lbr_select & LBR_USER_CALLSTACK);
> +}
> +EXPORT_SYMBOL_GPL(lbr_select_user_callstack);

That function is pure and tiny, wth is that an exported symbol and not
an inline?