Bug#511703: text_poke_early crash and noreplace-paravirt

[Richard Kettlewell <rjk@terraraq.org.uk>]

I saw the text_poke_early crash too, on a Soekris net4501, which uses an 
AMD ElanSC520.  The problem may or may not apply to other 486-class 
hardware (some reports of the bug say it does).

The workaround is to specify noreplace-paravirt on the kernel command line.

If the bug does indeed affect all 486-class CPUs then it would be a good 
idea to compile CONFIG_PARAVIRT out of the -486 kernels entirely, at 
least until such time as the bug is fixed.

ttfn/rjk