Re: [PATCH] Kallsyms problems (was: Re: linux-next: arm build failures)

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On Sat, Jun 20, 2009 at 03:54:40PM +1000, Stephen Rothwell wrote:
> Hi Russell,
> 
> On Fri, 19 Jun 2009 16:13:21 +0100 Russell King <rmk+lkml@xxxxxxxxxxxxxxxx> wrote:
> >
> > On Wed, Jun 17, 2009 at 11:08:04PM +1000, Stephen Rothwell wrote:
> > > 
> > > On Wed, 17 Jun 2009 09:34:31 +0100 Catalin Marinas <catalin.marinas@xxxxxxx> wrote:
> > > >
> > > > Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> > > > > Over the past few days, I have started getting some arm configs (at least
> > > > > iop13xx_defconfig and integrator_defconfig, but some others) failing to
> > > > > build getting this error:
> > > > >
> > > > >   SYSMAP  System.map
> > > > >   SYSMAP  .tmp_System.map
> > > > > Inconsistent kallsyms data
> > > > > Try setting CONFIG_KALLSYMS_EXTRA_PASS
> > > > >
> > > > > Is this something you have seen?  Could it be my toolchain (I am
> > > > > currently using gcc 4.4.0 and have not changed it recently)?
> > > > 
> > > > I reported an error with kallsysms on ARM this Monday leading to
> > > > inconsistent data:
> > > > 
> > > > http://lkml.org/lkml/2009/6/15/233
> > > > 
> > > > Could it be related?
> > > 
> > > Could be.  I have added the proposed fix patch to my fixes tree until
> > > Linus or Sam gets around to including it.
> > 
> > No, I don't think it's got anything to do with it.  It's the kallsyms
> > generator that's getting confused.
> > 
> > What's happening is that we're ending up with differences between the
> > symbolic information generated for .tmp_vmlinux2 and vmlinux:
> 
> I do wonder if the above could be the root cause, though.  Since I added
> the added the fix mentioned above to linux-next, my arm builds have not
> failed do to this problem.  Or maybe this "fix" just works around another
> problem?
> 
> In any case, it would be nice if the fix (repeated below) could be sent
> to Linus by someone (it also fixes a problem that Dave Miller is seeing).

Just sent it. Overloaded with day-time stuff (again).

	Sam
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