linux-kernel - Re: [RFC] btf: Some structs are doubled because of struct ring

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Date:   Sat, 14 Dec 2019 12:35:10 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Andrii Nakryiko <andrii.nakryiko@...il.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        Quentin Monnet <quentin.monnet@...ronome.com>
Subject: Re: [RFC] btf: Some structs are doubled because of struct ring_buffer

On Fri, Dec 13, 2019 at 02:05:31PM -0500, Steven Rostedt wrote:

SNIP

>  	struct trace_array *tr = filp->private_data;
> -	struct ring_buffer *buffer = tr->trace_buffer.buffer;
> +	struct trace_buffer *buffer = tr->trace_buffer.buffer;
>  	unsigned long val;
>  	int ret;
>  
> diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
> index 63bf60f79398..308fcd673102 100644
> --- a/kernel/trace/trace.h
> +++ b/kernel/trace/trace.h
> @@ -178,7 +178,7 @@ struct trace_option_dentry;
>  
>  struct trace_buffer {
>  	struct trace_array		*tr;
> -	struct ring_buffer		*buffer;
> +	struct trace_buffer		*buffer;

perf change is fine, but 'trace_buffer' won't work because
we already have 'struct trace_buffer' defined in here

maybe we could change this name to trace_buffer_array?

thanks,
jirka