[BUG] 2.6.6-rc2-bk5 mm/slab.c change broke x86-64 SMP

[Mikael Pettersson]

The change to mm/slab.c between 2.6.6-rc2-bk4 and -bk5
broke x86-64 SMP. The symptoms are general protection
faults in __switch_to shortly after init starts, and
then the machine is dead. (Can't be more specific, my
box can't log early boot oopses.)

I'm only seeing this with x86-64 SMP; x86-64 UP and i386
SMP on the same machine (Athlon64 UP) have no problems.

Reverting 2.6.6-rc2-bk5's change to mm/slab.c eliminates
the problem.

/Mikael
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