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powerpc/kexec: Switch to a static PACA on the way out

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With dynamic PACAs, the kexecing CPU's PACA won't lie within the kernel
static data and there is a chance that something may stomp it when preparing
to kexec.  This patch switches this final CPU to a static PACA just before
we pull the switch.

Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Matt Evans
2010-07-07 21:55:37 +00:00
committed by Benjamin Herrenschmidt
parent 7e3f36c3e1
commit fc53b4202e
4 changed files with 31 additions and 11 deletions
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2
arch/powerpc/include/asm/paca.h
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@@ -146,7 +146,7 @@ struct paca_struct {
extern struct paca_struct *paca;
extern __initdata struct paca_struct boot_paca;
extern void initialise_paca(struct paca_struct *new_paca, int cpu);
extern void setup_paca(struct paca_struct *new_paca);
extern void allocate_pacas(void);
extern void free_unused_pacas(void);