linux-kernel - Re: [PPC64/Power7 - 2.6.35-rc5] Bad relocation warnings while Building a CONFIG_RELOCATABLE kernel with CONFIG

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Message-Id: <1279529778.4985.1.camel@subratamodak.linux.ibm.com>
Date:	Mon, 19 Jul 2010 14:26:17 +0530
From:	Subrata Modak <subrata@...ux.vnet.ibm.com>
To:	Michael Neuling <mikey@...ling.org>
Cc:	Paul Mackerras <paulus@...ba.org>,
	sachinp <sachinp@...ux.vnet.ibm.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Linuxppc-dev <Linuxppc-dev@...abs.org>,
	Paul Mackerras <paulus@....ibm.com>, divya.vikas@...ibm.com
Subject: Re: [PPC64/Power7 - 2.6.35-rc5] Bad relocation warnings while
	Building a CONFIG_RELOCATABLE kernel with CONFIG_ISERIES enabled

On Fri, 2010-07-16 at 12:04 +1000, Michael Neuling wrote:
> > commit e62cee42e66dcca83aae02748535f62e0f564a0c solved the problem for
> > 2.6.34-rc6. However some other bad relocation warnings generated against
> > 2.6.35-rc5 on Power7/ppc64 below:
> > 
> > MODPOST 2004 modules^M
> > WARNING: 2 bad relocations^M
> > c000000000008590 R_PPC64_ADDR32    .text+0x4000000000008460^M
> > c000000000008594 R_PPC64_ADDR32    .text+0x4000000000008598^M
> 
> I can't replicate this with your config with gcc 4.4.4 and binutils
> 2.20.  What are you using?

Well, i also have the following GCC (from Fedora 13 Rawhide)
# gcc --version
gcc (GCC) 4.4.4 20100611 (Red Hat 4.4.4-8)
Copyright (C) 2010 Free Software Foundation, Inc.

and binutils-2.20.51.0.2-22.fc13.ppc,

Regards--
Subrata

> 
> Mikey
> 
> > 
> > Config file attached.
> > 
> > Regards--
> > Subrata
> > 
> > On Fri, 2010-05-07 at 15:40 +1000, Paul Mackerras wrote:
> > > On Wed, May 05, 2010 at 05:20:51PM +0530, Subrata Modak wrote:
> > > 
> > > > I built 2.6.34-rc6 with the attached Fedora Config file
> > > > (config-2.6.33.1-19.fc13.ppc64) on my P5 Fedora Box and got the
> > > > following warning. Is the following expected ?
> > > > 
> > > > CALL    arch/powerpc/relocs_check.pl
> > > > Building modules, stage 2.
> > > > WARNING: 4 bad relocations
> > > > c00000000007216e R_PPC64_ADDR16_HIGHEST  __ksymtab+0x00000000009dcec8
> > > > c000000000072172 R_PPC64_ADDR16_HIGHER  __ksymtab+0x00000000009dcec8
> > > > c00000000007217a R_PPC64_ADDR16_HI  __ksymtab+0x00000000009dcec8
> > > > c00000000007217e R_PPC64_ADDR16_LO  __ksymtab+0x00000000009dcec8
> > > 
> > > No, it's not expected.  It's in iSeries code, so you could avoid it
> > > just by disabling CONFIG_ISERIES (I don't think any distro still
> > > supports legacy iSeries).  I'll post a patch to fix the problem
> > > properly.
> > > 
> > > Paul.

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