[S390] Initialize per cpu lowcores on cpu hotplug.

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Just copy the first 512 read-only bytes of the current cpu lowcore if
a new cpu gets onlined. The rest is zeroed out and must be explicitly
initialized. Current code just copies the entire lowcore and
initializes the needed fields.
This should reveal bugs in future enhancements quite early.
Also when the lowcore of the first cpu is replaced this is now done
atomically (no interrupts, no machine checks).

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 2008-02-19 15:29:29 +01:00 • committed by Martin Schwidefsky

parent a22fb7ff12

commit 591bb4f637

1 changed files with 38 additions and 15 deletions

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arch/s390/kernel/smp.c

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