linux-kernel - Re: [PATCH net-next 2/2] samples/bpf: add samples for HW

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Message-Id: <20170522.194041.936213399075786231.davem@davemloft.net>
Date:   Mon, 22 May 2017 19:40:41 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     ast@...com
Cc:     peterz@...radead.org, bgregg@...flix.com, daniel@...earbox.net,
        qinteng@...com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH net-next 2/2] samples/bpf: add samples for HW_CACHE /
 RAW events

From: Alexei Starovoitov <ast@...com>
Date: Mon, 22 May 2017 16:35:07 -0700

> yet perf_event_read() is least documented. hmm.
>  * u64 bpf_perf_event_read(&map, index)
>  *     Return: Number events read or error code
> 
> that needs to be fixed.

That's exactly what I was talking about :-)