Re: [RFC PATCH v2 02/34] x86/msr: Remove rdpmc()

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To: "Xin Li (Intel)" <xin@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-perf-users@xxxxxxxxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxx, linux-pm@xxxxxxxxxxxxxxx, linux-edac@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-acpi@xxxxxxxxxxxxxxx, linux-hwmon@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, platform-driver-x86@xxxxxxxxxxxxxxx
Subject: Re: [RFC PATCH v2 02/34] x86/msr: Remove rdpmc()
From: Dave Hansen <dave.hansen@xxxxxxxxx>
Date: Wed, 23 Apr 2025 07:23:18 -0700
Cc: tglx@xxxxxxxxxxxxx, mingo@xxxxxxxxxx, bp@xxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, hpa@xxxxxxxxx, acme@xxxxxxxxxx, jgross@xxxxxxxx, andrew.cooper3@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, namhyung@xxxxxxxxxx, mark.rutland@xxxxxxx, alexander.shishkin@xxxxxxxxxxxxxxx, jolsa@xxxxxxxxxx, irogers@xxxxxxxxxx, adrian.hunter@xxxxxxxxx, kan.liang@xxxxxxxxxxxxxxx, wei.liu@xxxxxxxxxx, ajay.kaher@xxxxxxxxxxxx, bcm-kernel-feedback-list@xxxxxxxxxxxx, tony.luck@xxxxxxxxx, pbonzini@xxxxxxxxxx, vkuznets@xxxxxxxxxx, seanjc@xxxxxxxxxx, luto@xxxxxxxxxx, boris.ostrovsky@xxxxxxxxxx, kys@xxxxxxxxxxxxx, haiyangz@xxxxxxxxxxxxx, decui@xxxxxxxxxxxxx
In-reply-to: <20250422082216.1954310-3-xin@zytor.com>
References: <20250422082216.1954310-1-xin@zytor.com> <20250422082216.1954310-3-xin@zytor.com>
User-agent: Mozilla Thunderbird

On 4/22/25 01:21, Xin Li (Intel) wrote:
> rdpmc() is not used anywhere, remove it.

I'm not sure it was *ever* used (at least since git started). Thanks for
finding this.

Acked-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>

References:
- [RFC PATCH v2 00/34] MSR refactor with new MSR instructions support
  - From: Xin Li (Intel)
- [RFC PATCH v2 02/34] x86/msr: Remove rdpmc()
  - From: Xin Li (Intel)

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