linux-kernel - Re: [PATCH][GIT PULL] ftrace: Rename config option HAVE_C_MCOUNT_RECORD to HAVE_C

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Message-ID: <1287150575.23682.65.camel@gandalf.stny.rr.com>
Date:	Fri, 15 Oct 2010 09:49:35 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Frédéric Weisbecker <fweisbec@...il.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH][GIT PULL] ftrace: Rename config option
 HAVE_C_MCOUNT_RECORD to HAVE_C_RECORDMCOUNT

On Fri, 2010-10-15 at 11:41 +0200, Ingo Molnar wrote:
> * Ingo Molnar <mingo@...e.hu> wrote:
> 
> > FYI, a recent tracing change causes this new warning on latest -tip:
> 
> It appears it has been there for a longer time. So not caused by a 
> recent commit - but it's a real warning nevertheless.

Are you sure? We hit this bug before, but that was fixed by:

25aac9dc7c8c73798c1be8aa36141f980d32579e
ftrace, ia64: explictly ignore a file in recordmcount.pl

Basically what is happening in ftrace.o is that we have:

	ftrace_make_nop(mod, rec, mcount);

That reference to "mcount" will be in the relocation table. The perl
script simply fixes this by not processing the files "ftrace.c". I can
add the same to the C code which should fix this.

Patch soon.

-- Steve


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