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authorJames Bottomley <James.Bottomley@SteelEye.com>2007-01-22 09:18:31 -0600
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-01-22 19:39:36 -0800
commit9ee79a3d372fcb6729893437f4923c5efd1f85db (patch)
tree6a220d2935ed4c539e41a9ad7057bfbc21deafd8 /include/asm-i386
parentebcccd14b73831fa7fbc197e1d2b9c710a65731e (diff)
[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>
Diffstat (limited to 'include/asm-i386')
-rw-r--r--include/asm-i386/processor.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h
index a52d6544042..359f10b54f5 100644
--- a/include/asm-i386/processor.h
+++ b/include/asm-i386/processor.h
@@ -743,6 +743,7 @@ extern void enable_sep_cpu(void);
extern int sysenter_setup(void);
extern int init_gdt(int cpu, struct task_struct *idle);
+extern void cpu_set_gdt(int);
extern void secondary_cpu_init(void);
#endif /* __ASM_I386_PROCESSOR_H */