linux-kernel - Re: [PATCH tip 1/2] ring_buffer: remove unused flags parameter

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Message-ID: <20090206014840.GE9846@ghostprotocols.net>
Date:	Thu, 5 Feb 2009 23:48:40 -0200
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...e.hu>,
	Jens Axboe <jens.axboe@...cle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH tip 1/2] ring_buffer: remove unused flags parameter

Em Thu, Feb 05, 2009 at 11:17:02PM +0100, Frederic Weisbecker escreveu:
> On Thu, Feb 05, 2009 at 04:12:56PM -0200, Arnaldo Carvalho de Melo wrote:
> > Impact: API change, cleanup
> > 
> > From ring_buffer_{lock_reserve,unlock_commit}.
> > 
> > Cc: Ingo Molnar <mingo@...e.hu>
> > Cc: Frédéric Weisbecker <fweisbec@...il.com>
> > Cc: Jens Axboe <jens.axboe@...cle.com>
> > Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
> > ---
> >  block/blktrace.c                 |    8 +++---
> >  include/linux/ring_buffer.h      |    9 ++----
> >  kernel/trace/kmemtrace.c         |   12 +++-----
> >  kernel/trace/ring_buffer.c       |    9 +-----
> >  kernel/trace/trace.c             |   56 +++++++++++++------------------------
> >  kernel/trace/trace_boot.c        |   12 +++-----
> >  kernel/trace/trace_branch.c      |    7 ++---
> >  kernel/trace/trace_hw_branches.c |    6 ++--
> >  kernel/trace/trace_mmiotrace.c   |   12 +++-----
> >  kernel/trace/trace_power.c       |   12 +++-----
> >  10 files changed, 51 insertions(+), 92 deletions(-)
> > 
> > $ codiff /tmp/vmlinux.before /tmp/vmlinux.after
> > linux-2.6-tip/kernel/trace/trace.c:
> >   trace_vprintk              |  -14
> >   trace_graph_return         |  -14
> >   trace_graph_entry          |  -10
> >   trace_function             |   -8
> >   __ftrace_trace_stack       |   -8
> >   ftrace_trace_userstack     |   -8
> >   tracing_sched_switch_trace |   -8
> >   ftrace_trace_special       |  -12
> >   tracing_sched_wakeup_trace |   -8
> >  9 functions changed, 90 bytes removed, diff: -90
> > 
> > linux-2.6-tip/block/blktrace.c:
> >   __blk_add_trace |   -1
> >  1 function changed, 1 bytes removed, diff: -1
> > 
> > /tmp/vmlinux.after:
> >  10 functions changed, 91 bytes removed, diff: -91
> 
> 
> codiff... I didn't know this great tool! :-)

My marketing dept is not so good, but since you liked it, I guess its
appropriate to point you to this, that is the only documentation
available about it and some of its friends, like pahole:

https://ols2006.108.redhat.com/2007/Reprints/melo-Reprint.pdf

Now back to the Rostedts extended TODO list.

- Arnaldo
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