tree 6a220d2935ed4c539e41a9ad7057bfbc21deafd8
parent ebcccd14b73831fa7fbc197e1d2b9c710a65731e
author James Bottomley <James.Bottomley@SteelEye.com> 1169479111 -0600
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1169523576 -0800

[PATCH] x86: fix PDA variables to work during boot

The current PDA code, which went in in post 2.6.19 has a flaw in that it
doesn't correctly cycle the GDT and %GS segment through the boot PDA,
the CPU PDA and finally the per-cpu PDA.

The bug generally doesn't show up if the boot CPU id is zero, but
everything falls apart for a non zero boot CPU id.  The basically kills
voyager which is perfectly capable of doing non zero CPU id boots, so
voyager currently won't boot without this.

The fix is to be careful and actually do the GDT setups correctly.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>