linux-kernel - Re: [RFC PATCH v3 07/37] bpf tools: Allow caller to set printing function

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Message-ID: <555A27A8.2010907@plumgrid.com>
Date:	Mon, 18 May 2015 10:55:52 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Wang Nan <wangnan0@...wei.com>, paulus@...ba.org,
	a.p.zijlstra@...llo.nl, mingo@...hat.com, acme@...nel.org,
	namhyung@...nel.org, jolsa@...nel.org, dsahern@...il.com,
	daniel@...earbox.net, brendan.d.gregg@...il.com,
	masami.hiramatsu.pt@...achi.com
CC:	lizefan@...wei.com, linux-kernel@...r.kernel.org, pi3orama@....com
Subject: Re: [RFC PATCH v3 07/37] bpf tools: Allow caller to set printing
 function

On 5/17/15 3:56 AM, Wang Nan wrote:
> By libbpf_set_print(), users of libbpf are allowed to register he/she
> own debug, info and warning printing functions. Libbpf will use those
> functions to print messages. If not provided, default info and warning
> printing functions are fprintf(stderr, ...); defailt debug printing
> is NULL.
>
> Signed-off-by: Wang Nan <wangnan0@...wei.com>
> ---

Acked-by: Alexei Starovoitov <ast@...mgrid.com>

would be good to add a sentence to the commit log explaining
that perf and patch 30 makes use of this api:

> +void libbpf_set_print(int (*warn)(const char *format, ...),
> +		      int (*info)(const char *format, ...),
> +		      int (*debug)(const char *format, ...));
> +

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