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

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Date:   Mon, 22 May 2017 19:26:51 -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 15:48:40 -0700

> @@ -31,7 +31,7 @@ static unsigned long long (*bpf_get_current_uid_gid)(void) =
>  	(void *) BPF_FUNC_get_current_uid_gid;
>  static int (*bpf_get_current_comm)(void *buf, int buf_size) =
>  	(void *) BPF_FUNC_get_current_comm;
> -static int (*bpf_perf_event_read)(void *map, int index) =
> +static u64 (*bpf_perf_event_read)(void *map, u64 flags) =
>  	(void *) BPF_FUNC_perf_event_read;

If the second argument really is "u64 flags", then please update
the comments in tools/include/uapi/linux/bpf.h as well.

Thank you.