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SubjectRe: Linux 2.6.38-rc1 doesn't boot

* H. Peter Anvin <h.peter.anvin@intel.com> wrote:

> On 01/19/2011 12:12 AM, Shaohua Li wrote:
> > On Wed, 2011-01-19 at 15:49 +0800, Markus Trippelsdorf wrote:
> >> On 2011.01.19 at 08:39 +0100, Markus Trippelsdorf wrote:
> >>> On 2011.01.18 at 15:54 -0800, Linus Torvalds wrote:
> >>>>
> >>>> And as usual, report any regressions to the lists and the appropriate
> >>>> authorities.
> >>>
> >>> Unfortunately 2.6.38-rc1 doesn't even boot on my machine (amd64).
> >>> This is caused by 86b1e8dd83cbb0f:
> >>> x86: Make relocatable kernel work with new binutils
> >>>
> >>> Reverting the commit solves the problem.
> >>
> >> I'm running the latest binutils:
> >> GNU ld (Linux/GNU Binutils) 2.21.51.0.5.20110104
> > Hmm, reproduce it here with binutils-2.21.51.0.6-20110118
> > but not with GNU ld (GNU Binutils for Ubuntu) 2.20.51-system.20100908
> > I got this in system.map: ffffffff03514880 D jiffies_64, which looks
> > wrong.
> > looks binutils changed something again.
> > Have no idea, CC Lu Hongjiu.
> >
>
> Either way... the whole jiffies vs jiffies_64 thing is kind of
> ridiculous. We should be able to do it in a completely
> architecture-generic way by either making it a union(!) (with "jiffies"
> and "jiffies_64" presumably would be #defines, or we do a global replace
> across the tree), moving the variable declaration itself to a .S file
> (which would only have data components and therefore would be
> arch-generic) or doing something like the attached (untested since it is
> 1 am here) patch.
>
> This should let us get rid of the hacks in *all* the architectures, not
> just x86.

Ok - until it's resolved i'll queue up a revert - a known build failure is preferred
to a boot regression.

Thanks,

Ingo


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