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

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Date:	Thu, 15 Jul 2010 17:05:43 +0530
From:	Subrata Modak <subrata@...ux.vnet.ibm.com>
To:	Paul Mackerras <paulus@...ba.org>
Cc:	Linuxppc-dev <Linuxppc-dev@...abs.org>,
	Paul Mackerras <paulus@....ibm.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	sachinp <sachinp@...ux.vnet.ibm.com>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	divya.vikas@...ibm.com
Subject: [PPC64/Power7 - 2.6.35-rc5] Bad relocation warnings while Building
	a CONFIG_RELOCATABLE kernel with CONFIG_ISERIES enabled

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

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.

View attachment "config-2.6.35-rc5" of type "text/plain" (104542 bytes)