linux-kernel - Re: [RFC/PATCH 2/3] recordmcount: Record locations of __aeabi

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Message-ID: <20151123155834.37b11beb@gandalf.local.home>
Date:	Mon, 23 Nov 2015 15:58:34 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	Måns Rullgård <mans@...sr.com>,
	Arnd Bergmann <arnd@...db.de>,
	Nicolas Pitre <nico@...xnic.net>,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC/PATCH 2/3] recordmcount: Record locations of
 __aeabi_{u}idiv() calls on ARM

On Mon, 23 Nov 2015 12:53:35 -0800
Stephen Boyd <sboyd@...eaurora.org> wrote:

 
> 
> This comment in recordmcount.pl may tell us something.
> 
> 	#
> 	# Somehow the make process can execute this script on an
> 	# object twice. If it does, we would duplicate the mcount
> 	# section and it will cause the function tracer self test
> 	# to fail. Check if the mcount section exists, and if it does,
> 	# warn and exit.
> 	#
> 	print STDERR "ERROR: $mcount_section already in $inputfile\n" .
> 	    "\tThis may be an indication that your build is corrupted.\n" .
> 	    "\tDelete $inputfile and try again. If the same object file\n" .
> 	    "\tstill causes an issue, then disable CONFIG_DYNAMIC_FTRACE.\n";
> 	exit(-1);

I believe I hit this by hitting ctrl-C during a build and then starting
it again. It's been a while so it could have been something else.

-- Steve


> 
> I don't think there's much that can be done here besides making
> it silent unless there's some verbose build flag set (-v?), but
> it is interesting that you see it spew thousands of times. I've
> never seen the error printed, but perhaps I'm not building the
> kernel the same way you are. Care to share how you're building
> and seeing these error messages?
> 

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