linux-kernel - arm build failures (Was: linux-next: triage for March 13, 2012)

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Date:	Wed, 14 Mar 2012 11:41:15 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Paul Gortmaker <paul.gortmaker@...driver.com>
Cc:	<linux-next@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Russell King <rmk@....linux.org.uk>, tony@...eyournoodle.com
Subject: arm build failures (Was: linux-next: triage for March 13, 2012)

On Tue, 13 Mar 2012 19:47:07 -0400 Paul Gortmaker <paul.gortmaker@...driver.com> wrote:
>
> ARM:netx_defconfig,pnx4008_defconfig 
> 	when:	Mar 14, 02:43
> 	why:	net/core/pktgen.c: can't find a register in class 'GENERAL_REGS'
> 	status:	
> 	fix:	
> 	ref:	http://kisskb.ellerman.id.au/kisskb/buildresult/5869486/

This is this:

net/core/pktgen.c:682:2775: error: can't find a register in class 'GENERAL_REGS' while reloading 'asm'
net/core/pktgen.c:682:3153: error: can't find a register in class 'GENERAL_REGS' while reloading 'asm'
net/core/pktgen.c:682:2775: error: 'asm' operand has impossible constraints
net/core/pktgen.c:682:3153: error: 'asm' operand has impossible constraints

Which is a do_div() call.  The relevant code does not appear to have
changed, so this may well be a result of our toolchain changing from
"arm-linux-gcc (GCC) 4.4.0, GNU ld (GNU Binutils) 2.19.1" to
"arm-unknown-linux-gnueabi-gcc (GCC) 4.6.3, GNU ld (GNU Binutils) 2.22".

Anyone have any thoughts?
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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