[S390] hibernation: fix lowcore handling

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Our swsusp_arch_suspend() backend implementation disables prefixing
by setting the contents of the prefix register to 0.
However afterwards common code functions are called which might
access percpu data structures.
Since the lowcore contains e.g. the percpu base pointer this isn't
a good idea. So fix this by copying the hibernating cpu's lowcore to
absolute address zero.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Heiko Carstens 2009-07-24 12:39:49 +02:00 • committed by Martin Schwidefsky

parent 4be3bd7849

commit 5f954c3426

2 changed files with 10 additions and 7 deletions

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4

arch/s390/kernel/early.c

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13

arch/s390/power/swsusp_asm64.S

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