linux-kernel - Re: [PATCH v2 1/8] perf/x86: add a function to get the lbr stack

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Date:   Thu, 6 Sep 2018 20:28:11 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Wei Wang <wei.w.wang@...el.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        pbonzini@...hat.com, kan.liang@...el.com, peterz@...radead.org,
        mingo@...hat.com, rkrcmar@...hat.com, like.xu@...el.com
Subject: Re: [PATCH v2 1/8] perf/x86: add a function to get the lbr stack

> +int perf_get_lbr_stack(struct perf_lbr_stack *stack)
> +{
> +	stack->lbr_nr = x86_pmu.lbr_nr;
> +	stack->lbr_tos = x86_pmu.lbr_tos;
> +	stack->lbr_from = x86_pmu.lbr_from;
> +	stack->lbr_to = x86_pmu.lbr_to;
> +
> +	if (x86_pmu.intel_cap.lbr_format == LBR_FORMAT_INFO)
> +		stack->lbr_info = MSR_LBR_INFO_0;
> +	else
> +		stack->lbr_info = 0;

Seems weird to export the enum value if the enum isn't exported.
How can it be used?

-Andi