linux-kernel - Re: [RFC] Re: [PATCH v3 1/2] tracing/syscalls: Rename variable 'nr' to '__syscall

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Message-ID: <20160229142111.GG8720@kernel.org>
Date:	Mon, 29 Feb 2016 11:21:11 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...nel.org>,
	Taeung Song <treeze.taeung@...il.com>,
	linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Lai Jiangshan <jiangshanlai@...il.com>
Subject: Re: [RFC] Re: [PATCH v3 1/2] tracing/syscalls: Rename variable 'nr'
 to '__syscall_nr'

Em Sat, Feb 27, 2016 at 04:13:57PM +0100, Peter Zijlstra escreveu:
> On Fri, Feb 26, 2016 at 10:57:13AM -0300, Arnaldo Carvalho de Melo wrote:
> 
> > Ingo, Peter, have you guys followed this case?
> > 
> > Summary: Some tracepoint have multiple fields with the same name, 'nr',
> >          the first one is a unique syscall ID, the other is a syscall
> >          argument:
> 
> I'm all for pushing the limits on tracepoint ABI. I'm all for making it
> less rigid. So if we can get away with changing this under the promise
> of helping fixup fallout, I'm all for it.
> 
> That means we can always just change tracepoints, and they're not really
> ABI at all.

I'll take that as an Acked-by, and will apply Taeung/Steven's patch for
the kernel + the builtin-trace.c change, Ok everybody?

- Arnaldo